5.Muscles of Upper Limb

7/27/2019 5.Muscles of Upper Limb

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MUSCLES OF UPPER LIMB

MUSCLES OF FOREARM WRIST AND

HAND


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FOREARM

Note: the deep fascia in the forearm(antebrachial fascia) encloses the forearm

region. This fascial sheath, together with theinterosseous membrane (between the radiusand ulna) and fibrous intermuscular septa,divides the forearm into anterior andposterior fascial compartments, each havingits own muscles, nerves, and blood supply.


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Superficial Group

Pronator Teres

Originhumeral head: medial epicondyle of

humerus (common flexor tendon)

ulnar head: coronoid process of ulna

Insertion radius

action: pronation and flexion of forearm nerve supply: median nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Coronoid_process_of_ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Coronoid_process_of_ulnahttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Flexor Carpi Radialis

Originmedial epicondyle of humerus

(common flexor tendon)

Insertion Bases of second and third

metacarpal bones

action: flexion and abduction of hand at wristjoint

nerve supply: median nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Third_metacarpal_bonehttp://en.wikipedia.org/wiki/Third_metacarpal_bonehttp://en.wikipedia.org/wiki/Third_metacarpal_bonehttp://en.wikipedia.org/wiki/Third_metacarpal_bonehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Palmaris Longus

Originmedial epicondyle of humerus

(common flexor tendon)

Insertion palmar aponeurosis

action: flexion of hand

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Medial_epicondyle_of_humerushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Flexor Carpi Ulnaris

Originmedial epicondyle (common flexor

tendon)

Insertion pisiform

action: flexion and adduction of hand at wrist

joint

nerve supply: ulnar nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Pisiformhttp://en.wikipedia.org/wiki/Pisiformhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Deep Group

Flexor Digitorum Superficialis

Originmedial epicondyle of the humerus

(common flexor tendon) as well as parts of the

radius and ulna.

Insertion phalanges

action: flexion of middle phalanx of fingers;

assists in flexing proximal phalanx and hand

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Radius_(bone)http://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Phalangeshttp://en.wikipedia.org/wiki/Phalangeshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Radius_(bone)http://en.wikipedia.org/wiki/Common_flexor_tendonhttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Flexor Pollicis Longus

Origin The middle 2/4 of the volar surface of theradius and the adjacent interosseus membrane.(Also occasionally a small origin slightly on themedial epicondyle of the ulna.)

Insertion The base of the distal phalanx of thethumb

action: flexion of distal phalanx of thumb

nerve supply: anterior interosseous branch ofmedian nerve
http://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Distal_phalanxhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Distal_phalanxhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/Medial_epicondylehttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Interosseus_membranehttp://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/Volarhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Flexor Digitorum Profundus

Originulna

Insertion distal phalanges action: flexion of distal phalanx of fingers;

assists in flexion of middle and proximal

phalanges and wrist

nerve supply: ulnar and median nerves
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Distal_phalangeshttp://en.wikipedia.org/wiki/Distal_phalangeshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Pronator Quadratus

Origin medial, anterior surface of the ulna

Insertion lateral, anterior surface of theradius

action: pronation of forearm

nerve supply: anterior interosseous branch ofmedian nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Muscles of the Posterior Fascial Compartment -

generally extensors

1. Superficial Group - arise from the lateralepicondyle & ridge just above it


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Brachioradialis:

Origin :Lateral supracondylar ridge of the

humerus

Insertion Distal radius (Radial styloid

process)

action: flexion of forearm; rotation of forearm

to midprone position(Beer mug Raising muscle )

nerve supply: radial nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Lateral_supracondylar_ridgehttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/Radial_styloid_processhttp://en.wikipedia.org/wiki/Radial_styloid_processhttp://en.wikipedia.org/wiki/Radial_styloid_processhttp://en.wikipedia.org/wiki/Radial_styloid_processhttp://en.wikipedia.org/wiki/Radiushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Lateral_supracondylar_ridgehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Extensor Carpi Radialis Longus*:

Originlateral supracondylar ridge

Insertion 2nd metacarpa

action: extension and abduction of hand at

wrist joint

nerve supply: radial nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Lateral_supracondylar_ridgehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/2nd_metacarpalhttp://en.wikipedia.org/wiki/2nd_metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Lateral_supracondylar_ridgehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Extensor Carpi Radialis Brevis

Originhumerus at the anterior oflateral

epicondyle (common extensor tendon)

Insertion base of the 3rd metacarpal

action: extension and abduction of hand at

wrist joint

nerve supply: deep branch of radial nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/3rd_metacarpalhttp://en.wikipedia.org/wiki/3rd_metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Extensor Digitorum:

Originlateral epicondyle (common extensor

tendon)

Insertion middle and distal phalanges

action: extension of fingers and hand

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Phalangeshttp://en.wikipedia.org/wiki/Phalangeshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Extensor Digiti Minimi

Origin the anterior portion of the lateral

epicondyle of the humerus (common extensortendon)

Insertion at the extensor expansion, located

at the base of the proximal phalanx of thefinger on the dorsal side

action: extension of metacarpophalangeal

joint of little finger nerve supply: deep branch of radial nerve
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Lateral_epicondylehttp://en.wikipedia.org/wiki/Lateral_epicondylehttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Extensor_expansionhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/Extensor_expansionhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Lateral_epicondylehttp://en.wikipedia.org/wiki/Lateral_epicondylehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Extensor Carpi Ulnaris:

OriginCommon extensor tendon (lateral

epicondyle), ulna

Insertion 5th metacar

action: extension and adduction of hand at

wrist joint

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/5th_metacarpalhttp://en.wikipedia.org/wiki/5th_metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Lateral_epicondyle_of_the_humerushttp://en.wikipedia.org/wiki/Common_extensor_tendonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Supinator:

OriginLateral epicondyle ofhumerus,

supinator crest ofulna, radial collateral

ligament, annular ligament

Insertion Lateral proximal radial shaft

action: supination of forearm

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Lateral_epicondylehttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Supinator_cresthttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Radial_collateral_ligamenthttp://en.wikipedia.org/wiki/Radial_collateral_ligamenthttp://en.wikipedia.org/wiki/Annular_ligamenthttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Radial_shafthttp://en.wikipedia.org/wiki/Radial_shafthttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Annular_ligamenthttp://en.wikipedia.org/wiki/Radial_collateral_ligamenthttp://en.wikipedia.org/wiki/Radial_collateral_ligamenthttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Supinator_cresthttp://en.wikipedia.org/wiki/Humerushttp://en.wikipedia.org/wiki/Lateral_epicondylehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Deep Group - arise principally in succession

along the dorsal side of the forearm bones

and interosseous membrane


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Abductor Pollicis Longus*

Originulna, radial styloid process

Insertion first metacarpal

action: abduction and extension of thumb

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/Radial_styloid_processhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/First_metacarpalhttp://en.wikipedia.org/wiki/First_metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Radial_styloid_processhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Extensor Pollicis Brevis:

Originradius

Insertion thumb, proximal phalanx


joint of thumb

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Radius_%28bone%29http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Proximal_phalangeshttp://en.wikipedia.org/wiki/Proximal_phalangeshttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Radius_%28bone%29http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Abductor Pollicis Longus,Extensor Pollicis

Brevi,Extensor Pollicis Longus*

All the three muscles form the boundaries of a

triangular skin depression on the lateral side

of the wrist known as the anatomical

snuffbox where the scaphoid bone is mosteasily palpated and pulsations of the radial

artery can be felt)


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Extensor Indicis :

Originulna

Insertion index finger (extensor hood)


joint of index finger

http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Index_fingerhttp://en.wikipedia.org/wiki/Extensor_hoodhttp://en.wikipedia.org/wiki/Extensor_hoodhttp://en.wikipedia.org/wiki/Index_fingerhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Ulnahttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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WRIST AND HAND


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WRIST AND HAND

Flexor and Extensor Retinacula

specialized bands of deep fascia seen in the

region of the wrist that serve to hold the long

flexor and extensor tendons in position


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flexor retinaculum stretches across the

front of the wrist and converts the concave

anterior surface of the carpus into an

osteofascial tunnel for the passage of themedian nerve and the flexor tendons of the

thumb and fingerscarpal tunnel


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extensor retinaculum stretches across the

back of the wrist and converts the grooves on

the posterior ends of the radius and ulna into

6 separate tunnels for the passage of the longextensor tendons


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Palmar Aponeurosis

thick, triangular-shaped deep fascia occupying

the central area of the palm medial and lateral borders continuous with

the thinner deep fascia covering the thenar

and hypothenar muscles gives firm attachment to the overlying skin

and so improve the grip and to protect the

underlying tendons


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Fibrous Flexor Sheaths

strong fibrous sheaths attached to the sides of

the phalanges

together with anterior surfaces of phalanges

and interphalangeal joints, form osteofibrous

tunnels in which the flexor tendons of the

fingers lie.


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Synovial Flexor Sheaths

surround the long flexor tendons

form digital synovial sheaths, common flexor

synovial sheath (ulnar bursa), and the synovial

sheath for the flexor pollicis longus (radial

bursa).


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Palmar Fascial Spaces

potential spaces filled with loose connective

tissue that may limit the spread of infection in

the palm

continuous distally with the lumbrical canals

closed of proximally from the forearm by the

walls of the carpal tunnel


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I t i i (Sh t) M l f th H d


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Intrinsic (Short) Muscles of the Hand

1. Short Muscles of the Thumb

a. Abductor Pollicis Brevis - abduction of

thumb

Origin Transverse carpal ligament, the

scaphoid and trapezium

Insertion Radial base ofproximal phalanx of

thumb and the thumb extensors[1]
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Scaphoidhttp://en.wikipedia.org/wiki/Trapeziumhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Thumb_extensorhttp://en.wikipedia.org/wiki/Abductor_pollicis_brevis_musclehttp://en.wikipedia.org/wiki/Abductor_pollicis_brevis_musclehttp://en.wikipedia.org/wiki/Thumb_extensorhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Trapeziumhttp://en.wikipedia.org/wiki/Scaphoidhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Flexor Pollicis Brevis :

Origintrapezoid, flexor retinaculum

Insertion thumb, proximal phalanx

flexes metacarpophalangeal joint of thumb
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Trapezoid_bonehttp://en.wikipedia.org/wiki/Flexor_retinaculumhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Proximal_phalangeshttp://en.wikipedia.org/wiki/Proximal_phalangeshttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Flexor_retinaculumhttp://en.wikipedia.org/wiki/Trapezoid_bonehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Opponens Pollicis:

Origintrapezium and transverse carpal

ligament

Insertion metacarpal bone of the thumb on

its radial side - pulls thumb medially and

forward across palm

All the three muscles form the thenar

eminence
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Trapezium_%28bone%29http://en.wikipedia.org/wiki/Transverse_carpal_ligamenthttp://en.wikipedia.org/wiki/Transverse_carpal_ligamenthttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Metacarpalhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Transverse_carpal_ligamenthttp://en.wikipedia.org/wiki/Transverse_carpal_ligamenthttp://en.wikipedia.org/wiki/Trapezium_%28bone%29http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Adductor Pollicis

OriginTransverse head: anterior body of the

third metacarpal

Oblique head: bases of the second and thethird metacarpals and the adjacent trapezoid

and capitate bones

Insertion medial side of the base of theproximal phalanx of the thumb and the ulnar

sesamoid adduction of thumb
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Third_metacarpalhttp://en.wikipedia.org/wiki/Second_metacarpalhttp://en.wikipedia.org/wiki/Third_metacarpalhttp://en.wikipedia.org/wiki/Trapezoidhttp://en.wikipedia.org/wiki/Capitatehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Ulnar_sesamoidhttp://en.wikipedia.org/wiki/Ulnar_sesamoidhttp://en.wikipedia.org/wiki/Ulnar_sesamoidhttp://en.wikipedia.org/wiki/Ulnar_sesamoidhttp://en.wikipedia.org/wiki/Thumbhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Capitatehttp://en.wikipedia.org/wiki/Trapezoidhttp://en.wikipedia.org/wiki/Third_metacarpalhttp://en.wikipedia.org/wiki/Second_metacarpalhttp://en.wikipedia.org/wiki/Third_metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Short Muscles of the Little Finger - form the

hypothenar eminence

a. Abductor Digiti Minimi

Originpisiform

Insertion base of the proximal phalanx of

the 5th digit on the ulnar or medial side.

abducts little finger
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Pisiformhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/5th_digithttp://en.wikipedia.org/wiki/5th_digithttp://en.wikipedia.org/wiki/Proximal_phalanxhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Pisiformhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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b. Flexor Digiti Minimi

Originhamate bone

Insertion little finger

flexes little finger
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Hamate_bonehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Little_fingerhttp://en.wikipedia.org/wiki/Little_fingerhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Hamate_bonehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Opponens Digiti Minimi

Origin Hook ofhamate and flexor retinaculum

Insertion Medial border of 5th metacarpal

pulls 5th metacarpal

forward as in cupping of the palm
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Hamatehttp://en.wikipedia.org/wiki/Flexor_retinaculumhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Metacarpalhttp://en.wikipedia.org/wiki/Metacarpalhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Flexor_retinaculumhttp://en.wikipedia.org/wiki/Hamatehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Small Muscles of the Hand


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Small Muscles of the Hand

a. Palmaris Brevis Originflexor retinaculum (medial), palmar

aponeurosisInsertion palm

corrugates skin to improve grip of palm

b. Lumbricals (4)

Originflexor digitorum profundus

Insertion extensor expansion

flex metacarpophalangeal joints and extendinterphalangeal joints of fingers, except thumb
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Flexor_retinaculum_of_the_handhttp://en.wikipedia.org/wiki/Handhttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Handhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Flexor_digitorum_profundushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Extensor_expansionhttp://en.wikipedia.org/wiki/Extensor_expansionhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Flexor_digitorum_profundushttp://en.wikipedia.org/wiki/Flexor_digitorum_profundushttp://en.wikipedia.org/wiki/Flexor_digitorum_profundushttp://en.wikipedia.org/wiki/Flexor_digitorum_profundushttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Handhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Palmar_aponeurosishttp://en.wikipedia.org/wiki/Flexor_retinaculum_of_the_handhttp://en.wikipedia.org/wiki/Flexor_retinaculum_of_the_handhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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brevis lumbricals

Interossei (8)


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Interossei (8)

Palmar Interossei (4) - Originmetacarpals ,Insertion proximal phalange

adduct fingers toward center 3rd finger. Note: PAD

(palmer adduction)

Dorsal Interossei (4)

OriginmetacarpalsInsertion proximal phalanges

abduct fingers from center of 3rd finger. Note: DAB

(dorsal abduction)
http://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Metacarpalshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Proximal_phalangehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Metacarpalshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Proximal_phalangeshttp://en.wikipedia.org/wiki/Proximal_phalangeshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Metacarpalshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Proximal_phalangehttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeletonhttp://en.wikipedia.org/wiki/Metacarpalshttp://en.wikipedia.org/wiki/List_of_bones_of_the_human_skeleton


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Palmar and dorsal


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Nerve Supply: ALL intrinsic muscles of the

hand are innervated by the ULNAR NERVE,

EXCEPT for 5 muscles: the 3 thenar muscles

and lumbricals 1 and 2 which are innervatedby the median nerve

5.Muscles of Upper Limb

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Transcript of 5.Muscles of Upper Limb