Re: Questions for the Thigh and Popliteal Fossa

Comments:
: : : Questions for the Thigh and Popliteal Fossa : : : 1. Despite a total lesion of the tibial portion of the sciatic nerve, flexion of the knee remains possible. : : True: Biceps femoris short head is innervated by the common fibular nerve and can still flex the knee. : Agreed. The short head is innvervated by the sciatic nerve peroneal part; not the common peroneal nerve. : : : 2. Despite a total lesion of the sciatic nerve; flexion of the knee remains possible. : : True: Sartorius can flex the knee : Agreed. Plus? : : : 3. Despite total lesions of the sciatic nerve and the femoral nerve; flexion of the knee remains possible. : : False, the Obturator nerve doesn't innervate any muscles that can flex the knee. : Think about the pes anserinus and gracilis : : : 4. Despite total lesions of the sciatic nerve, femoral nerve, and obturator nerve; flexion of the knee remains possible. : : False: See above : Agreed. : : : 5. The first perforating artery supplies the upper part of the posterior thigh. : : True: The perforating arteries of the profunda femoris penetrate the middle thigh through adductor brevis and pectineus. The artery then forms part of the trochanter anastomosis along with the inferior gluteal artery, medial femoral circumflex, and lateral femoral circumflex. : Agreed. The cruciate anastomosis of the hip. : : : 6. The popliteal artery supplies the lower region of the posterior thigh. : : True: once the femoral artery emerges from the adductor hiatus into the popliteal fossa it becomes the popliteal artery and supplies the lower region of the posterior thigh. : Agreed. Great. : : : 7. The inferior gluteal artery supplies a branch to the sciatic nerve. : : True: via the companion artery of the sciatic?? This was confusing : Agreed. Did you find that in the wannabe book? : : : 8. The perforating arteries supply the sciatic nerve. : : False? I was only able to find that the sciatic nerve arterial supply is variable but often by the inferior gluteal artery. : Arterial supply is to regions. The sciatic nerve is in the posterior thigh region. The perforating arteries and the popliteal artery augment the arteria nervi acommpanens nervi ischiodici (something like that). : : : 9. The popliteal artery supplies the sciatic nerve. : : False... same as above? : You can predict that it does. It is the artery of the region. : : : 10. The posterior surface of the distal femur contributes to the posterior boundary of the popliteal fossa. : : False: Anterior boundary : Agreed. : : : 11. The superior medial genicular artery circles the femur at a location superior to the adductor tubercle and deep the tendon of the posterior adductor magnus. : : False: it circles the femur superior to the adductor tubercle, but superficial to the tendon of the adductor magnus. : It is deep to the tendon of insertion. : : : 12. The inferior lateral genicular artery crosses the posterior surface of the popliteus muscle. : : True: The LGA is superficial to the popliteus. : Agreed. Note the relationship to the arcuate ligament of the knee. : : : 13. The oblique popliteal ligament, derived from the tendon of insertion of the semimembranosus, crosses the posterior knee capsule from inferior lateral to superior medial. : : False: inferior medial to superior lateral : Agreed. : : : 14. The fibular circumflex artery supplies the common peroneal nerve. : : True?: I'm not sure if it supplies it, but it does cross deep to it inferior to the head of the fibula. : Agreed. Again, arteries to regions. You can bet it sends some twigs. : : : 15. The middle genicular artery enters the intercondyler fossa from the anterior border of the popliteal fossa. : : True : Agreed. : : : 16. The pes anserinus is related to 3 motor nerves, three compartments of the thigh, and one sensory nerve. : : True: SGT FOT: Sartorius (Femoral), Gracilis (Obturator), Semitendinosis (Tibia) -- sensory: Saphenous Nerve? : Agreed. excellent. : : : 17. Lymph from the dorsal lateral region of the foot drains to the popliteal lymph nodes. : : True: Dorsal and superficial regions of the foot and deep portions of the leg/thigh drain to the popliteal lymph before draining to the subinguinal lymph nodes. : Agreed. Significance? : : : 18. The long head of the biceps femoris is innervated by the common peroneal part of the sciatic nerve. : : False: The short head of the BF... : Agreed. : : : 19. The posterior part of the adductor magnus arises from the ischial spine, inserts on the adductor tubercle, and is innervated by the obturator nerve. : : False: It arrises from the Ischial tuberosity and is innervated by the tibial nerve. The anterior (medial) part of the Ad. M. arises from the ischiopubic ramus, inserts in the linea aspea, and is innervated by the Obturator nerve. : Agreed. Excellent. : : : 20. The semitendinosus has a long tendon of origin. : : False: long tendon of insertion. : Agreed. : : : 21. The semitendinosus contributes to the pes anserinus. : : True: SGT <-- T= semitendinosus. : Agreed. : : : 22. The short head of the biceps femoris, unlike the hamstring muscles, can flex the knee despite that the hip is fully extended. : : False: Both can flex the knee; the short head is able to laterally rotate the thigh. The long head of the BF is weaker at hip extension when the leg is extended. : The short head is monoarticular; It flexes the knee regardless of hip position. The hamstrings, being biarticular, can not flex strongly at the knee if the hip is extended. Hip extension by the hamstrings will be stronger with an extended knee. Try extending your hip with a fully flexed knee - not much fun there. Good way to get a cramp. At least I did. : : : 23. The posterior femoral cutaneous nerve, at mid-thigh, is posterior to the hamstrings. : : True. : Agree. : : : 24. Only one nerve arises from lateral side of the sciatic nerve and this nerve innervates the short head of biceps femoris. : : True: The only main branch laterally is the common fibular, which innervates the short head of the biceps femoris. : Agree. Sort of. The lecturer spoke loosely today. The short head of the biceps is innervated by the peroneal part of sciatic nerve. The peroneal part of the sciatic nerve gives rise to the common peroneal nerve. The common peroneal nerve is a bona fide structure of the popliteal fossa, a terminal branch of the sciatic nerve. It does not have motor branches prior to further dividing into superficial and deep peroneal nerves. A nuance. : : : 25. The short head of the biceps femoris flexes the knee, laterally rotates the knee, and flexes the hip. : : False? I think flexion of hip is the action of the long head. : Agreed. Short head does not cross the hip joint. : : : 26. The femoral vein, within the adductor canal, is deep to the femoral artery and the popliteal vein, within the popliteal fossa, is superficial to the popliteal artery. : : True : Agreed. Mental gymnastics with anatomical position. : : : 27. The femoral vein, within the adductor canal, is posterior to the femoral artery and the popliteal vein, within the popliteal fossa, is anterior to the popliteal artery. : : False: If it is superficial in the popliteal fossa, as pointed out in the last question, then it must also be posterior. : Agreed. The point is that the vein is posterior to the artery; both in the adductor canal and in the popliteal fossa. Superficial/Deep terminology flips at the longitudinal axis - the femur. : : : 28. The ascending branch of the lateral femoral circumflex artery contributes to the genicular anastomosis. : : True: along with the superior gluteus artery and the deep circumflex iliac artery. : Wrong anastomosis. I am not sure what happened here. Think about the cruciate (hip) anastomosis. : : : 29. The superior lateral genicular artery passes through the adductor hiatus. : : False, it branches off the popliteal artery, which is only named such when the femoral artery emerges from the adductor hiatus. : Agreed. Nevertheless, the superior medial genicular artery does pass through the adductor hiatus. : : : 30. The superior medial genicular artery passes deep to the tendon of insertion from the posterior adductor magnus. : : False, see 11. : Sorry to be repetitive. The is true. : : : 31. The descending genicular artery passes through the adductor hiatus. : : False, it exits the adductor canal through the vastus medialis, which is before the hiatus. : Agreed. : : : 32. The inferior lateral genicular artery crosses the posterior surface of the popliteus muscle. : : True : Agreed. Or the arcuate ligament. : : Thanks again for any feedback.

Link URL:  
Link Title:
Image URL: