Spinal segments innervating muscles of the lower extremity 2
Topic: Anatomy
Created on Wednesday, August 30 2006 by jdmiles
Last modified on Tuesday, November 4 2008.
Regarding the muscles of the lower extremity, which of the following muscles typically receives innervation from the S2 spinal segment?
A) Pectineus B) Gluteus minimus C) Gluteus maximus D) Extensor digitorum longus E) Tibialis posterior
This question was created on August 30, 2006 by jdmiles.
This question was last modified on November 04, 2008.
ANSWERS AND EXPLANATIONS
A) Pectineus
This answer is incorrect.
Pectineus typically receives innervation from spinal segments L2 and L3 (
See References)
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B) Gluteus minimus
This answer is incorrect.
Gluteus minimus typically receives innervation from spinal segments L5 and S1 (
See References)
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C) Gluteus maximus
This answer is correct.
The muscles of the lower extremity which typically receive innervation from spinal segment s2 include piriformis, gluteus maximus, semitendinosus, semimembranosus, biceps femoris, peroneus longus, peroneus brevis, gastrocnemius, soleus, plantaris, flexor hallucis longus, flexor digitorum longus, abductor hallucis, flexor digitorum brevis, abductor digiti minimi, quadratus plantae, lumbricals, flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis, plantar interossei, and dorsal interossei (
See References)
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D) Extensor digitorum longus
This answer is incorrect.
Extensor digitorum longus typically receives innervation from spinal segments L5 and S1 (
See References)
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E) Tibialis posterior
This answer is incorrect.
Tibialis posterior typically receives innervation from spinal segments L4 and L5 (
See References)
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References:
1. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore. (ISBN:068306133X) | Advertising:
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anatomy
Spinal segments innervating muscles of the lower extremity 2
Question ID: 830200603
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 08/30/2006
Modified: 11/04/2008
Estimated Permutations: 0