Leg muscles

Assoc. Prof. Jenny Hayes

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Objectives Major features and surface landmarks of the tibia and fibula. Fascial compartments enclosing the major muscle groups. Component muscles of the major muscle groups • position • joint/s they act upon • movement/s produced

Suggested pre-reading Gray’s Anatomy for Students: Conceptual overview of Bones and joints, Muscles, Chapter 6, Lower Limb, p. 517-520

Moore K L. Clinically Oriented Anatomy. 7th ed. Williams and Wilkins; 2014. ISBN 978-1-4511-1945-9. Ch.5 Fig5.4, 13

Figure 6.13 Muscle compartments in the thigh and leg.

Downloaded from: StudentConsult (on 26 August 2011 06:57 AM) © 2005 Elsevier

Muscles in the thigh and leg are separated into compartments by bone, fascia and interosseous membrane:

Thigh: Medial (adductor) compartment with muscles acting mostly on hip Anterior (extensor) compartment with muscles extending knee and flexing hip Posterior (flexor) compartment with muscles that act on hip and knee because they span both joins

Leg: Muscles in anterior compartment dorsiflex the foot and extend the toes Muscles in the posterior compartment plantarflex the foot and flex the toes Muscles in the lateral compartment evert the foot

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #491A

intermuscular septa:

anterior

posterior interosseous membrane

tibia

fibula deep fascia

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #491B

ant

lat

post

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #488

tibialis anterior

EHL EDL

fibularis tertius

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #498

tibialis anterior

EHL

EDL

Extensor retinaculum “Timothy has a nasty, dirty toe”

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #490

fibularis longus

fibularis brevis

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #497A

fibular retinacula

sup

inf

PL PB

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #485

gastrocnemius

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #486

soleus

plantaris popliteus

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #487

FDL

tibialis posterior

FHL

Netter, F.H. Interactive Atlas of Human Anatomy. 3rd ed. New Jersey, Icon Learning Systems, 2003, ISBN: 1-929007-15-9, Plate #497B

flexor retinaculum

“Tom, Dick and very naughty Harry”

TP

FDL

FHL

Barcode Specimen Description Location

516-100333 Left lower limb Three dissections of the muscles on the anterior aspect of the left leg. From left to right: the first displays tibialis anterior, the second displays peroneus longus and peroneus brevis and the third shows the muscles and the anterior tibial nerve with its branches to tibialis anterior.

24C

516-100344 Flexor hallucis longus A dissection showing the flexor hallucis longus muscle. The muscle belly of flexor digitorum longus has been removed and its tendon can be seen in the distal part of the dissection.

24A

516-100327 Lower limb Left male leg and hemipelvis with viscera removed.

Museum annex (front display)

516-100317 Adductor magnus Dissection of the left adductor magnus. The fascial attachment of the hamstring part of the muscle to the femur has been removed.

24A

516-100329 Lower limb Dissection of the medial and posterior relations of the left knee joint.

24A

Images and information on these specimens can also be accessed via the museum online database: http://mdhs.unimelb.edu.au/harrybrookesallenmuseum/catalogue