What cord segments comprise the conus medullaris Stephen @University

Question 6 / 22: What cord segments comprise the conus medullaris, and what do they innervate?

A. The conus consists of lower sacral and a small coccygeal segment that innervates the perineum.

B. The conus consists of the lumbar and sacral segments which innervate the lower part of the
body from the pelvis down.

C. The conus consists of S1-S5 and 3-4 coccygeal segments and innervates the pelvic area.

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Explanation:

Spinal nerves C-1 - C-7 emerge above the corresponding vertebra. Since there is not an eighth cervical vertebra, spinal nerve C-8 emerges below vertebra C-7. All succeeding spinal nerves emerge below the vertebra for which they are named.

Quiz Home Page

https://www.jobilize.com/ch-04-spinal-cord-general-anatomy-brain-stem

Ch 04: Spinal Cord General Anatomy & Brain Stem

Author:

M.D.Stephen VoronLecturer

University of Utah

USA

Access: Public Instant Grading

Attribution: Stephen C. Voron, M.D., Suzanne S. Stensaas, Ph.D. , Department of Neurobiology and Anatomy, University of Utah, School of Medicine, Salt Lake City, Utah 84132, http://library.med.utah.edu/kw/hyperbrain

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