302 Lab A

Question 1

Which peripheral nerves does the cervical plexus arise from?

Answer 1

C1-C5

Question 2

Which peripheral nerves does the brachial plexus arise from?

Answer 2

C5-T1

Question 3

Which peripheral nerves does the lumbar plexus arise from?

Answer 3

L1-L4

Question 4

Which peripheral nerves does the sacral plexus arise from?

Answer 4

L4-S4

Question 5

The medullary cone is approximately located at ______

Answer 5

L2

Question 6

Which nuclei reside in the anterior horn of spinal cord gray matter?

Answer 6

Visceral and somatic motor nuclei

Question 7

Which nuclei reside in the posterior horn of spinal cord gray matter?

Answer 7

Visceral and somatic sensory nuclei

Question 8

The ventral root carries….

Answer 8

Efferent motor signals

Question 9

The dorsal root carries….

Answer 9

Afferent sensory signals

Question 10

Ascending tracts are

Answer 10

Afferent sensory signals UP spinal cord

Question 11

Descending tracts are….

Answer 11

Efferent motor signals DOWN spinal cord

Question 12

Order of spinal nerve structure from inside out

Answer 12

Rootlets —> Root (Posterior + Anterior) —> Spinal Nerve

Question 13

Nerve layers

Answer 13

Endoneurium —> Perineurium —> Epineurium

Question 14

What is the rule for numbering spinal nerves?

Answer 14

Name for inferior vertebrae until C8 then switch to naming for superior vertebrae

Question 15

Anterior ramus

Answer 15

Largest branch of spinal nerves, forms cervical and lumbar plexuses

Question 16

Posterior ramus

Answer 16

Innervates muscles and skin of back

Question 17

Communicating rami

Answer 17

Carry info to/from sympathetic chain ganglia

Question 18

Meningeal branch

Answer 18

Innervates structure of spinal cord

Question 19

Cervical plexus includes what nerves

Answer 19

Phrenic

Question 20

Brachial plexus includes what nerves

Answer 20

Axillary, Median, Musculocutaneous, Ulnar, Radial

Question 21

What nerves are in the lumbar plexus

Answer 21

Femoral nerve

Question 22

What nerves are in the sacral plexus?

Answer 22

Sciatic nerve

Question 23

Which two nerves arise from C7?

Answer 23

Axillary and Radial

Question 24

Which two nerves arise from C5,6 and T1?

Answer 24

Median and Ulnar

Question 25

Order of meninges from outside in

Answer 25

Dura mater, arachnoid mater, (subarachnoid space), pia mater

Question 26

How can you tell which is the posterior horn?

Answer 26

Usually closer to touching external part of spinal cord

Question 27

Where is the gray commisure?

Answer 27

Connecting two hemispheres of gray matte