Difference between revisions of "MUSCLES-DEEP POSTERIOR COMPARTMENT OF LEG"
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[[Summary Article| | ===== [[Summary Article|'''SUMMARY''']] ===== | ||
ALL TENDONS (EXCEPT THE POPLITEUS) PASS BENEATH THE <b>MEDIAL</b> FLEXOR RETINACULUM | |||
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<br/>1. TIBIALIS POSTERIOR - arises from the interosseous membrane, adjoining surfaces of tib/fib & adjoining aponeurosis of the FDL. The tendon grooves the back of the medial malleolus, passes above the sustentaculum tali to be inserted into the navicular tuberosity & 3 cuneiforms. | <br/>1. TIBIALIS POSTERIOR - arises from the interosseous membrane, adjoining surfaces of tib/fib & adjoining aponeurosis of the FDL. The tendon grooves the back of the medial malleolus, passes above the sustentaculum tali to be inserted into the navicular tuberosity & 3 cuneiforms. | ||
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<br/>2. FLEXOR DIGITORUM LONGUS - <i>tibial origin: </i>posterior surface, below the soleal line. <i>Fibular origin: </i>by a broad aponeurosis. The tendon passes beneath the flexor retinaculum to enter the sole, where it crosses the FHL tendon to divide into 4 tendons. They pass into the fibrous flexor sheaths of the lateral 4 toes, perforate the tendons of the FDB to be inserted into the bases of the distal phalanges. | |||
<br/>3. FLEXOR HALLUCIS LONGUS - arises from the flexor surface of the fibula, interosseous membrane & adjoining aponeurosis of the FDL. The tendon passes underneath the flexor retinaculum, grooves the posterior process of the talus & sustentaculum tali to be inserted into the base of the distal phalanx of the great toe. | |||
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<br/> | <br/>4. POPLITEUS - arises from the popliteal surface of the tibia and inserts into a facet/pit in the lateral surface of the lateral femoral condyle (the tendon lies within the capsule of the knee joint: arcuate popliteal ligament) & lateral meniscus. This laterally rotates the femur on the fixed tibia & retracts the lateral meniscus. | ||
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<br/ | <br/><i>5. All 4 muscles are supplied by the tibial nerve. Aretrial supply - posterior tibial & peroneal arteries. </i> | ||
<br/><i>[[Image:paste-2615635083823.jpg]]</i> | <br/><i>[[Image:paste-2615635083823.jpg]]</i> | ||
==Reference(s)== | ==Reference(s)== | ||
Latest revision as of 11:29, 1 January 2023
SUMMARY
ALL TENDONS (EXCEPT THE POPLITEUS) PASS BENEATH THE MEDIAL FLEXOR RETINACULUM
1. TIBIALIS POSTERIOR - arises from the interosseous membrane, adjoining surfaces of tib/fib & adjoining aponeurosis of the FDL. The tendon grooves the back of the medial malleolus, passes above the sustentaculum tali to be inserted into the navicular tuberosity & 3 cuneiforms.
2. FLEXOR DIGITORUM LONGUS - tibial origin: posterior surface, below the soleal line. Fibular origin: by a broad aponeurosis. The tendon passes beneath the flexor retinaculum to enter the sole, where it crosses the FHL tendon to divide into 4 tendons. They pass into the fibrous flexor sheaths of the lateral 4 toes, perforate the tendons of the FDB to be inserted into the bases of the distal phalanges.
3. FLEXOR HALLUCIS LONGUS - arises from the flexor surface of the fibula, interosseous membrane & adjoining aponeurosis of the FDL. The tendon passes underneath the flexor retinaculum, grooves the posterior process of the talus & sustentaculum tali to be inserted into the base of the distal phalanx of the great toe.
4. POPLITEUS - arises from the popliteal surface of the tibia and inserts into a facet/pit in the lateral surface of the lateral femoral condyle (the tendon lies within the capsule of the knee joint: arcuate popliteal ligament) & lateral meniscus. This laterally rotates the femur on the fixed tibia & retracts the lateral meniscus.
5. All 4 muscles are supplied by the tibial nerve. Aretrial supply - posterior tibial & peroneal arteries.
Reference(s)
R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone.
Gray, H., Carter, H.V. and Davidson, G. (2017). Gray’s anatomy. London: Arcturus.
