Spinal Cord and Spinal Nerves Flashcards Preview

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Flashcards in Spinal Cord and Spinal Nerves Deck (10):
1

How many cranial nerves are there and how many spinal nerves?

12 cranial nerves, 31 pairs of spinal nerves

2

Approximately where does the spinal cord terminate relative to the vertebral bodies (in the adult and adolescent)?

Between the L1 and L2 vertebral bodies

3

Where do nerve roots merge to become spinal nerves?

At the IV foramina

4

What are the two enlargements of the spinal cord?

Cervical enlargement and lumbosacral enlargement

5

Which horn of spinal cord gray matter contains cell bodies of sensory neurons?

The posterior horn

6

Which horn of spinal cord gray matter contains cell bodies of motor neurons?

The anterior horn

7

Four types of fibers conveyed by spinal nerves

General Somatic Afferent (GSA), General Somatic Efferent (GSE), General Visceral Afferent (GVA), General Visceral Efferent (GVE)

8

What do general somatic afferent nerve fibers do?

Relay sensory information from the skin, such as pain, touch, proprioception, pressure, etc.

9

What do general somatic efferent nerve fibers do?

Communicate motor instructions to skeletal muscles

10

What types of nerve fibers are carried in the dorsal ramus of a spinal nerve?

All 4 types (GSA, GSE, GVA, GVE). Same is true for ventral ramus

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