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) The hypothenar muscles receives innervation from spinal segment C6. B) Teres major receives innervation from spinal segment C2. C) Teres major receives innervation from spinal segment C5. D) Teres major receives innervation from spinal segment C3. E) Infraspinatus receives innervation from spinal segment T2.
This question was created on September 03, 2006 by .
This question was last modified on September 03, 2006.
ANSWERS AND EXPLANATIONS
A) the hypothenar muscles receives innervation from spinal segment C6.
This answer is incorrect.
The statement, "the hypothenar muscles receives innervation from spinal segment C6." is false.
the hypothenar muscles receives innervation from ulnar nerve, receives innervation from spinal segment C8, and receives innervation from spinal segment T1. (
See References)
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B) teres major receives innervation from spinal segment C2.
This answer is incorrect.
The statement, "teres major receives innervation from spinal segment C2." is false.
teres major receives innervation from the brachial plexus, receives innervation from spinal segment C5, receives innervation from spinal segment C6, and receives innervation from spinal segment C7. (
See References)
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C) teres major receives innervation from spinal segment C5.
This answer is correct.
The statement, "teres major receives innervation from spinal segment C5." is true.
teres major receives innervation from the brachial plexus, receives innervation from spinal segment C5, receives innervation from spinal segment C6, and receives innervation from spinal segment C7. (
See References)
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D) teres major receives innervation from spinal segment C3.
This answer is incorrect.
The statement, "teres major receives innervation from spinal segment C3." is false.
teres major receives innervation from the brachial plexus, receives innervation from spinal segment C5, receives innervation from spinal segment C6, and receives innervation from spinal segment C7. (
See References)
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E) infraspinatus receives innervation from spinal segment T2.
This answer is incorrect.
The statement, "infraspinatus receives innervation from spinal segment T2." is false.
infraspinatus receives innervation from the brachial plexus, receives innervation from spinal segment C5, and receives innervation from spinal segment C6. (
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