An easy way to learn shoulder muscles

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C. Riedinger - An easy way to learn muscles C. Riedinger - An easy way to learn muscles Muscles of the shoulder biceps brachii serratus anterior pectoralis major short head long head coraco- brachialis pectoralis minor name meaning body part location / layer origin insertion nerve supply blood supply function pectoralis major major chest muscle shoulder supericial clavicular head: anterior surface of medial half of clavicle, sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of the external obliqe muscle lateral lip of intertubercular groove of humerus (long insertion) lateral pectoral nerve (lat. cord) pectoral branch of thoracoacromial trunk adducts and medially rotates the humerus pectoralis minor minor chest muscle shoulder deep to pectoralis major 3rd to 5th ribs near their costal cartilages medial border and superior surface of coracoid process of scapula medial pectoral nerve (post. cord) pectoral branch of thoracoacromial trunk stabilises scapula by drawing it against the thoracic wall, horizontal adduction of shoulder serratus anterior muscle that's notched like the edge of a saw shoulder outer surface of upper 8 or 9 ribs (or more) costal aspect of medial margin of scapula long thoracic nerve lateral thoracic artery, thoracodorsal artery protracts (=anterior movement of arms at shoulder) and stabilises scapula biceps brachii biceps of the arm arm anterior, superficial long head: supraglenoid tubercle of scapula (through sleeve of synovial tissue in intertubercular /bicipital groove of humerus, short head: coracoid process, joins long head midway down arm via common tendon into the bicipical tuberosity of radius. Medial side: via bicipital aponeurosis into deep fascia of medial forearm and subcutaneous border of ulna musculocutaneous brachial artery supinator of forearm when elbow is flexed, flexes elbow in fully supinated position. Shoulder: stabilises and minor flexion coracobrachialis muscle of the arm and coracoid process arm anterior, deep tip of coracoid process of scapula (with short head of biceps) medial aspect mid-shaft of humerus musculocutaneous brachial artery adducts shoulder (to hold things under arm), weak flexor of shoulder joint

description

A summary for learning the muscles of the shoulder including their attachments, innervation, etc., without having to have too many books open. Resources: "Grey’s anatomy", "Taschenatlas Anatomie", "McMinn’s Clinical Atlas of Human Anatomy" and Wikipedia. Awaiting further proof-reading!

Transcript of An easy way to learn shoulder muscles

Page 1: An easy way to learn shoulder muscles

C. Riedinger ­ An easy way to learn musclesC. Riedinger ­ An easy way to learn muscles

Muscles of the shoulder

bicepsbrachii

serratus anterior

pectoralis major

short head

long head

coraco­brachialis

pectoralisminor

name meaning body part location / layer origin insertion nerve supply blood supply function

pectoralis major major chest muscle shoulder supericial

clavicular head: anterior surface of medial half of clavicle, sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of the 

external obliqe muscle

lateral lip of intertubercular groove of 

humerus (long insertion)

lateral pectoral nerve

(lat. cord)

pectoral branch of thoracoacromial 

trunk

adducts and medially rotates the humerus

pectoralis minor minor chest muscle shoulderdeep to pectoralis major

3rd to 5th ribs near their costal cartilages

medial border and superior surface of coracoid process of 

scapula

medial pectoral nerve

(post. cord)

pectoral branch of thoracoacromial 

trunk

stabilises scapula by drawing it against the 

thoracic wall, horizontal adduction of 

shoulder

serratus anteriormuscle that's notched like the edge of a saw

shoulder outer surface of upper 8 or 9 ribs (or more)

costal aspect of medial margin of scapula

long thoracic nerve

lateral thoracic artery, 

thoracodorsal artery

protracts (=anterior movement of arms at shoulder) and stabilises 

scapula

biceps brachii biceps of the arm arm anterior, superficial

long head: supraglenoid tubercle of scapula (through sleeve of synovial tissue in 

intertubercular /bicipital groove of humerus, short head: coracoid process, joins long head midway down arm

via common tendon into the bicipical tuberosity of radius. Medial side: 

via bicipital aponeurosis into deep fascia of medial forearm and subcutaneous border of ulna

musculocutaneous brachial artery

supinator of forearm when elbow is flexed, flexes elbow in fully supinated position. 

Shoulder: stabilises and minor flexion

coracobrachialis muscle of the arm and coracoid process arm anterior, 

deep

tip of coracoid process of scapula (with short head of biceps)

medial aspect mid­shaft of humerus musculocutaneous brachial artery

adducts shoulder (to hold things under arm), weak flexor of shoulder 

joint

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C. Riedinger ­ An easy way to learn musclesC. Riedinger ­ An easy way to learn muscles

Muscles of the shoulder (2)

teres major

serratus anterior

pectoralis major

infraspinatus*

deltoid

subscapularis*

sub­scapularis*

supraspinatus*

teres major

latissimusdorsi

teres minor*

(tricepsbrachii)

ROTATOR CUFF

OTHER muscles

Insertions of rotator cuff muscles:                              Insertions around bicipital / intertubercular groove:           

(Right arm seem from post.)       

(Right arm seem from ant.)       

Bicipital groove:­ teres major medial to it­ latissimus dorsi in floor of it­ pectoralis major lateral to it­ bicipital tendon on top!

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