nerves innervating the muscles of the upper extremity
Topic: Anatomy
Created on Sunday, September 3 2006 by
Last modified on Sunday, September 3 2006.
Which of the following is most accurate regarding nerves innervating the muscles of the upper extremity?
A) Rhomboids receives innervation from median nerve. B) Lumbricals II receives innervation from axillary nerve. C) Lumbricals II receives innervation from anterior interosseous nerve. D) Extensor digitorum receives innervation from spinal segment C7. E) Flexor digitorum profundus I receives innervation from radial nerve.
This question was created on September 03, 2006 by .
This question was last modified on September 03, 2006.
ANSWERS AND EXPLANATIONS
A) rhomboids receives innervation from median nerve.
This answer is incorrect.
The statement, "rhomboids receives innervation from median nerve." is false.
rhomboids receives innervation from the brachial plexus, receives innervation from spinal segment C4, and receives innervation from spinal segment C5. (
See References)
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B) lumbricals II receives innervation from axillary nerve.
This answer is incorrect.
The statement, "lumbricals II receives innervation from axillary nerve." is false.
lumbricals II receives innervation from median nerve, receives innervation from spinal segment C8, and receives innervation from spinal segment T1. (
See References)
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C) lumbricals II receives innervation from anterior interosseous nerve.
This answer is incorrect.
The statement, "lumbricals II receives innervation from anterior interosseous nerve." is false.
lumbricals II receives innervation from median nerve, receives innervation from spinal segment C8, and receives innervation from spinal segment T1. (
See References)
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D) extensor digitorum receives innervation from spinal segment C7.
This answer is correct.
The statement, "extensor digitorum receives innervation from spinal segment C7." is true.
extensor digitorum receives innervation from radial nerve, receives innervation from posterior interosseous nerve, receives innervation from spinal segment C7, and receives innervation from spinal segment C8. (
See References)
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E) flexor digitorum profundus I receives innervation from radial nerve.
This answer is incorrect.
The statement, "flexor digitorum profundus I receives innervation from radial nerve." is false.
flexor digitorum profundus I receives innervation from median nerve, receives innervation from anterior interosseous nerve, receives innervation from spinal segment C7, and receives innervation from spinal segment C8. (
See References)
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References:
1. Guarantors of Brain. (2000). Aids to the Examination of the Peripheral Nervous System, fourth edition. W.B. Saunders, Edinburgh. | |
2. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore. | |
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anatomy
nerves innervating the muscles of the upper extremity
Question ID: 683156834
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved.
Created: 09/03/2006
Modified: 09/03/2006
Estimated Permutations: 0