Unit I - CNS Review

Question 1

How may pairs of cranial nerves?

Answer 1

12 pairs

Question 2

Where cranial nerves connect to the brain it is called what?

Answer 2

Apparent origin

Question 3

Nucleus of origin is what type of function?

Answer 3

motor

Question 4

Nucleus of termination is what type of function?

Answer 4

sensory

Question 5

How many spinal nerves? Function?

Answer 5

31 pairs, mixed

Question 6

Spinal nerves attach to the spinal cord how?

Answer 6

ventral (anterior) and dorsal (posterior) rootlets

Question 7

Function of ventral (anterior) rootless?

Answer 7

motor/efferent

Question 8

Function of dorsal (posterior) rootlets?

Answer 8

sensory/afferent

Question 9

Other names for dorsal root ganglion?

Answer 9

Spinal ganglion, posterior root ganglion

Question 10

Another name for spinal nerve

Answer 10

Mixed spinal nerve

Question 11

Spinal nerve splits into what? Function(s)?

Answer 11

Anterior primary ramus
Posterior primary ramus
Mixed - sensory and motor

Question 12

Functional subdivisions of the nervous system?

Answer 12

Somatic and visceral (autonomic)

Question 13

Somatic is what function? Association?

Answer 13

Sensory (afferent) and motor (efferent)

Skeletal muscle

Question 14

Another way to say ‘visceral’?

Answer 14

autonomic

Question 15

Function of autonomic nervous system?

Answer 15

Controls vital body functions

Question 16

2 divisions of the visceral nervous system?

Answer 16

Sympathetic and parasympathetic

Question 17

Fight or flight; emergency. Division?

Answer 17

sympathetic

Question 18

Sympathetic division. How many efferent neurons to reach target? What types?

Answer 18

Two, preganglionic and postganglionic, and adrenergic

Question 19

Sympathetic, preganglionic neurons release what?

Answer 19

acetylcholine

Question 20

Sympathetic, postganglionic neurons release what?

Answer 20

norepinephrine

Question 21

Where many pre-ganglionic neurons terminate in the sympathetic division.

Answer 21

Sympathetic trunk

Question 22

What sympathetic nerves carry preganglionic neurons but do not synapse in the sympathetic trunk but go through it?

Answer 22

splanchnic nerves

Question 23

What organs does the autonomic division supply?

Answer 23

heart, lungs, abdominopelvic organs, blood vessels, arrector pili

Question 24

Parasympathetic and sympathetic supply same organs except for what?

Answer 24

Blood vessels

Question 25

How many efferent neurons to reach target in parasympathetic division? Types (3)?

Answer 25

Two, preganglionic and postganglionic and cholenergic

Question 26

Different in lengths of sympathetic and parasympathetic pathways?

Answer 26

Sympathetic - preganglionic short, post long

Parasympathetic -pre-ganglionic long, post short (in lining of organ)

Question 27

Where are the cell bodies of the visceral afferents located?

Answer 27

Spinal ganglion

Question 28

“return to normalcy” division?

Answer 28

parasympathetic

Question 29

Parasympathetic craniosacral nerves?

Answer 29

CN III, VII, IX, X and S2,3,4

Question 30

What type of splanchnic nerves in parasympathetic division?

Answer 30

Pelvic splanchnic nerves

Question 31

Two types of neurons of the somatic motor pathway?

Answer 31

Upper motor neurons and lower motor neurons

Question 32

Two types of upper motor neurons?

Answer 32

Pyramidal and extrapyramindal

Question 33

Pathway of the upper motor neuron?

Answer 33

Descends through corona radiate, internal capsule, crus cerebri, most cross in pyramids and descend in lateral corticospinal tract before synapsing in the anterior horn (primarily Rexed lamina VII)) of the gray matter.

Question 34

LMN synapse primarily in which rexed lamina?

Answer 34

R.L. IX