Re: Questions for the Leg Part I

Comments:
: : : True/False Questions for the Leg : : : 1. The fiber direction of the interosseous membrane resists proximal displacement of the femur. : : False?: Fibula? Since the interosseous membrane lies b/t the Tibia and Fibula and runs inferio-laterally : Agreed. : : : 2. The tendon of flexor digitorum longus crosses superficial to the tendon of flexor hallucis longus. : : True: They cross inferior to the Flexor retinaculum and medial to the calcaneous. After crossing, FHL extends medially to the great toe while FDL turns slightly laterally and attaches to digits 2-5. : Agreed. But posterior to flexor retinaculum? : : : 3. The tendon of the flexor hallucis longus, within the foot, is inferior to the tendon of flexor digitorum brevis. : : False: FDL is superficial, and therefore also inferior since it crosses on the plantar side of the foot. : Agreed. : : : 4. The anterior tibial artery enters the anterior compartment of the leg by passing medial to the neck of the fibula. : : True: It passes medially to the neck of the fibula through the Interosseous membrane. : Agreed. : : : 5. The deep peroneal nerve enters the anterior compartment of the leg by passing the superior free edge of the interosseous membrane. : : False: DPN enters the anterior compartment by passing inferior and laterally to the head of the fibula (and deep to the Fibularis Longus.) : Agreed. Excellent. : : : 6. The deep peroneal nerve enters the anterior compartment of the leg by passing the anterior lateral intermuscular septum. : : True: Deep peroneal N. supplies the anterior compartment of the leg while the superficial peroneal N. supplies the lateral compartment, however both brach from the common peroneal, which is in the lateral compartment (see last question). : Agreed. The superf. peroneal nerve crosses the posterior lateral intermuscular septum, but not the anterior. : : : 7. The talocural joint is primarily a joint of extension and flexion and most stable in flexion (plantar flexion) : : False, it is primarily a joint of extension and flexion, but is most stable in DORSAL felxion (extension). : Agreed. : : : 8. The talocalcaneonavicular (subtalar) joint is primarily a joint of eversion and inversion. : : True : Agreed. : : : 9. The transverse tarsal joint is primarily a joint of flexion and extension. : : False: This is tricky.. it has 2 axes, therefore it does both flexion/extension and inversion/eversion. I don't know if one is more primary, but sources say this is a "stabilizer" of the foot for uneven terrain. : Agreed. Pronation/supination as well perhaps. We will not dwell on this. : : : 10. The tendon of extensor hallucis brevis blends into the medial side of the tendon of extensor hallucis longus. : : Flase: Lateral side. : Agreed. : : : 11. The tendons of extensor digitorum brevis blend into the lateral side of the tendons of extensor digitorum longus. : : True : Agreed. : : : 12. The tendons of flexor hallucis brevis bifurcate inferior to the tendons of flexor digitorum longus and insert on the proximal phalanx. : : False: Also tricky, the FHB tendons don't bifurcate. The muscle bifurcates. Flexor digitorm brevis bifurcates inferior to FDL. : Agreed. I did not intend this to be tricky. I hastily changed some words and made it so unwittingly. : : : 13. The flexor digitorum longus flexes the proximal interphalangeal joint but not the distal interphalangeal joint. : : False: FDL flexes the DIP not the PIP. : Agreed. Except to say that flexor digitorum longus flexes all joints that it crosses including the proximal interphalangeal joint. : : : 14. The superior ramus of the "Y" of the inferior extensor retinaculum extends superior to the medial malleolus. : : True? It looks like it attaches on the medial malleolus, but I can't tell if it's superior. : Agreed. : : : 15. Sesamoid bones in the tendons of flexor hallucis brevis guide the tendon of flexor hallucis and the lateral sesamoid bone is a site of attachment for the transverse head of the adductor hallucis. : : True. : Agreed. I should have written flexor hallucis longus. : : : 16. The anterior medial malleolar artery circles the medial side of the tibia superior to the medial malleolus. : : True : Agreed. : : : 17. The peroneal artery enters the anterior compartment of the leg and then the lateral compartment of the leg. : : False: The peroneal artery supplies the lateral compartment through perforating arteries, but it actually lies in the deep posterior compartment of the leg since it branches off of the posterior tibial artery. : Agreed. Except to say that the peroneal artery indeed enters the anterior compartment near the ankle joint. It sometimes becomes the dorsalis pedis artery if the anterior tibial artery is slight. : : : 18. The lateral calcaneal artery arises from the peroneal artery. : : True: At the malleolus, the peroneal supplies the lateral malleolar, lateral calcaneal, as well as perforating and communicating branches in the anastomosis. : Agreed. excellent. : : : 19. Immediately superior to the sustentaculum tali is the tendon of flexor hallucis longus. : : False, the FHL is inferior, thus creating one of the "pulleys." : Agreed. : : : 20. Immediately medial (superficial) to the sustentaculum tali is the posterior tibial artery/vein and the tibial nerve. : : True: Tom (Tibialis Posterior) Dick (Flexor Digitorum Longus) and A Very Nervous (Posterior Tibial Vein, Artery, Nerve) Harry (Flexor Hallicus Longus). If Harry (FHL) is inferior to the Sustentaculum tali it only makes sense that "a very nervous" lay on top (superficial) to the sustentaculum tali : Agreed. Possibly the tibial nerve divides into lateral and medial plantar at this location. Splitting hairs. : : : 21. Immediately superior to the sustentaculum tali is the tendon of flexor digitorum longus. : : True: Using same logic as last question. : Agreed. : : : 22. Attaching to the anterior surface of the sustentaculum tali is the plantar calcaneonavicular (spring) ligament. : : True: the spring ligament goes from the anterior side of the sustentaculum tali to the navicular bone. : Agreed. The attachments and relations of the sustentaculum tali are worth noting. : : : 23. Attaching to the superior surface of the sustentaculum tali is the tibiocalcanial part of the deltoid ligament. : : True: : Agreed. : : Any feedback would be appreciated, Thanks! : Good work.

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