Spinal Cord and Meninges

Question 1

Two Enlargements of the spinal cord

Answer 1

cervical (c4-t1)-brachial plaxus

lumbar (region of vertebrae T11-L1) lumbar and sacral plexus

Question 2

Conus Medullaris

Answer 2

termination of the spinal cord

Question 3

Cauda Equina

Answer 3

“horse tail” formed by spinal nerve roots of the lumbar and sacral plexus
located in the lumbar cistern (subarachnoid space)

Question 4

Structure of Spinal Nerves

Answer 4

31 pairs of spinal nerves
dorsal (afferent) and ventral (efferent) nerve roots from spinal nerves

dorsal nerve roots travel through or terminate in grey matter of dorsal horn
ventral nerve roots originate in gray matter of the ventral horn

Question 5

Dura Matter

Answer 5

dural sac extends from foramen magnum
distal end of dural sac is FILUM TERMINALE (attaches to coccyx)
spinal nerve roots pierce dura and form dural sleeves

Question 6

Epidural Space

Answer 6

space between vertebral bone and dura, contains adipose tissue, venous plexus

Question 7

Arachnoid

Answer 7

middle layer between dura and pie

Question 8

Space between Pia and Arachnoid space

Answer 8

subarachnoid space
filled with CSF
cisterns-large areas of subarachnoid space

Question 9

Pia Matter

Answer 9

inner most layer
in spinal cord-small extension from dentate ligaments
dentate ligaments ancho the spinal cord to the dura
distal end-pia fillament extends from conus medullaris to end of dural sac