GENERAL HISTOLOGY

NERVOUS SYSTEM SPECIAL SENSE

SPINALCORD

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Inferior to the conus medullaris is a group of nerves that fan out and supply the pelvis and lower appendage. Name this group of nerves.
A
cauda equina
B
brachial plexus
C
cervical plexus
D
fillum terminale
Explanation: 

Detailed explanation-1: -The cauda equina occupies the lumbar cistern, a subarachnoid space inferior to the conus medullaris. The nerves that compose the cauda equina innervate the pelvic organs and lower limbs to include motor innervation of the hips, knees, ankles, feet, internal anal sphincter and external anal sphincter.

Detailed explanation-2: -The cauda equina ("horse’s tail") is a collection of nerves inferior to the conus medullaris that continue to travel through the vertebral column to the coccyx.

Detailed explanation-3: -Cauda equina syndrome (CES) occurs when there is dysfunction of multiple lumbar and sacral nerve roots of the cauda equina.

Detailed explanation-4: -At the bottom of the spinal cord (conus medullaris) is the cauda equina, a collection of nerves that derives its name from the Latin translation of “horse’s tail” (early anatomists thought the collection of nerves resembled a horse’s tail).

Detailed explanation-5: -Cauda equina syndrome (CES) results from compression and disruption of the function of these nerves and can be inclusive of the conus medullaris or distal to it, and most often occurs when damage occurs to the L3-L5 nerve roots.

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