Neuroanatomy: Spinal Cord and Spinal Nerves Flashcards Preview

C&M Term 2 > Neuroanatomy: Spinal Cord and Spinal Nerves > Flashcards

Flashcards in Neuroanatomy: Spinal Cord and Spinal Nerves Deck (7):
1

What are the dorsal and ventral rami and what do they supply?

These are branches going anteriorly and posteriorly from the mixed spinal nerve leaving the spinal cord
made up of both dorsal and ventral rootlets mixed together

Dorsal rami - muscles and sensation to the back
Ventral rami - muscles and sensation of the anterolateral trunk and limbs

2

What is the functional difference between dorsal and ventral nerve roots?

Dorsal nerve roots = somatic and visceral sensory
Ventral nerve roots = somatic and visceral motor

3

Where do the dura and arachnoid mater terminate inferiorly?

Around the S2 level

4

What is the lumabr cistern?

the area between the end of the spinal cord and the termination of the dura and arachnoid mater

5

What surface landmark can be used to determine betwen L4/5, the point of entry for an epidural

Supracristal plane
line between peaks to both iliac crests

6

Why is there more white matter as you ascend the spinal cord?

Cervical spinal cord has the most white matter
in order to achieve fine finger control, more myelinated axons are required (white matter

7

Is the spinothalamic tract somatotopically mapped?

yes, divisions for arm, trunk and leg
(for secondary neuron to run in)