BRAIN
CRANIAL NERVES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Spinal nerves of S.l-3
|
|
|
Anterior rami of spinal nerves L.2, 3
|
|
|
Posterior rami of spinal nerves L. 1 to coccygeal 1
|
|
|
Anterior and posterior nerve roots of the spinal nerves below the first lumbar segment of the spinal cord.
|
|
|
Spinal nerves of L.l-5
|
Detailed explanation-1: -The cauda equina roots have both an anterior and a posterior root. The anterior rami of these spinal nerves contribute to the lumbar and sacral plexuses, which provide motor and sensory innervation to the entire lower limb, pelvic and perineal regions.
Detailed explanation-2: -The individual nerve roots at the end of the spinal cord that provide motor and sensory function to the legs and the bladder continue along in the spinal canal. The cauda equina is the continuation of these nerve roots in the lumbar and sacral region.
Detailed explanation-3: -The cauda equina is the bundle of nerve roots located at the lower end of the spinal cord.
Detailed explanation-4: -The cauda equina is formed by the L2–L5, S1–S5, and coccygeal spinal nerve roots located in the dural sac.