QuestionSBA
QuestionChoice
Incorrect. The dural sac is the outermost meningeal layer that covers the spinal cord in the vertebral canal, terminating at S2. Spinal nerves pierce the dura mater layer as they exit the vertebral canal, transiently passing through the epidural space.
10009179
e
Dural sac
QuestionChoice
Incorrect. The filum terminale is a distal stalk of pia mater that attaches the tapered end of the spinal cord, the conus medullaris, to the dural sac inferiorly, anchoring the spinal cord within the vertebral column.
10009176
b
Filum terminale
QuestionChoice
Incorrect. The conus medullaris is the tapered distal part of the spinal cord inferior to the lumbar enlargement, corresponding to the termination of the spinal cord, which then becomes the cauda equina.
10009178
d
Conus medullaris
QuestionChoice
Incorrect. The denticulate ligaments are double layers of pia mater that extends from the spinal cord to the dural sac laterally, restricting movement of the spinal cord within the vertebral canal.
10009177
c
Denticulate ligament
QuestionChoice
Correct. The spinal cord begins at the foramen magnum and terminates at the conus medullaris at L1/2. The cauda equina consists of a bundle of spinal nerve roots from L2-L5 and the coccygeal nerve, resembling a horse's tail. It arises from the conus medullaris and the roots pass caudally to exit the vertebral column at their respective intervertebral foramina.
10009175
a
Cauda Equina
Concept
Chapter
2693
5317
Spinal cord
Topic
196
Neuroanatomy
14382
Picture
1742
37 - Spinal cord (cauda equina).png
images/mz6q5pis1682950657857.jpg
images/mz6q5pis1682950657857_256.jpg
images/mz6q5pis1682950657857_512.jpg
6SgOHQT2l4aHiHhoeIh3iAaIZ4Bn
Topic
196
Neuroanatomy
Identify the labelled structure.

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a