The axial MRI shown in Figure A shows a tumor located in one of the muscles of the thigh. Which nerve innervates this muscle?
"MRI shows a tumor in the sartorius muscle" is your statement.Without labelling the muscles and without seeing MRI cuts at different levels, how can we know that that muscle is indeed sartorius? In your image it shows a tumor in the medial (adductor) compartment.If a different MRI cut more proximally would have been shown, it would've appeared as if arising from the anterior compartment.We don't know at what level this MRI cut has been taken.
Compartments of leg
got it thank you!
Dr. Alfitury - the topic above lists the contents of the compartments, not what innervates them. The tibial nerve is located within the deep posterior compartment.
Superficial posterior compartment nerve supply is Tibial nerve and not sural nerve. please correct.thank you
does not split at the distal thigh but just above mid thigh, and tibial nerve supply all the hamstring muscles except the short head of the biceps femoris.
the sciatic nerve dived at the apex of the popliteal fossa at the level of the just below the gluteal fold (posterior thigh) to common p and tibial never!why you call it peroneal division?
J Bone Joint Surg Br. 2011 Nov;93(11):1471-4.
Bone Joint J. 2015 Sep;97-B(9):1204-13.
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can orthopaedic residents other than USA have access to these study plans?
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Excellent way to remember
During total hip arthroplasty (THA) via a posterior approach, where is the sciatic nerve most likely to be found?
Superficial to the piriformis and superficial to the short external rotators
Superficial to the piriformis and deep to the short external rotators
Deep to the piriformis and deep to the short external rotators
Deep to the piriformis and superficial to the short external rotators
Splits the piriformis and is superficial to the short external rotators
Your point is well taken, when describing anatomical relationships, it is more clear to use anatomical terms such as ventral/dorsal, caudal/rostral. However, when describing relevant anatomy in surgical dissections, surgeons (and those who write tests) often use the terms superficial/deep and proximal/distal. The starting position in this case is noted to be a posterior approach for THA. Thanks.
best regards for your efforts on the education side, if you could add a starting point of the anatomical position (looking from behind or from front) or if the answer would contain ( ventral or dorsal ) would be much less frustrating to the exam taker. and please review QID 2850, there it is said superficial to the piriformis muscle. also would be better ventral .... again thank you.
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Another great animation video:https://www.youtube.com/watch?v=s91bRGEjlPE
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Great Video animation:https://www.youtube.com/watch?v=9N_eR8Pojuw
Great video animation:https://www.youtube.com/watch?v=jcoDfCqTeCU
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