lecture 4 PNS

Question 1

Peripheral Nervous System Somatic Division

Answer 1

PNS provides the CNS with sensory information, CNS then tells the PNS what to do.

somatic = voluntary

Question 2

2 anatomical divisions of PNS

Answer 2

cranial nerve

spinal nerve

Question 3

two subdivisions of PNS

Answer 3

somatic- voluntary- muscles (somite derived tissues)

autonomic- involuntary -visceral structures

Question 4

ANS has three subdivisions

Answer 4

parasympathetic
sympathetic
Enteric

Question 5

Make up of vertebral column

Answer 5

C1-7
T1-13
L1-7
Sacrum 1-6

Question 6

Brachial Plexus is which nerves

Answer 6

C6-T1-2

Question 7

lumbarsacral plexus is what nerves

Answer 7

L4 to S3

Question 8

dorsal branch is a ___ nerve

Answer 8

mixed

Question 9

ventral branch is a ___ nerve

Answer 9

mixed

Question 10

ramus communicans is a ___ nerve

Answer 10

mixed

Question 11

dorsal root is a ____ nerve

Answer 11

sensory

from body to brain

Question 12

ventral root is a ___ nerve

Answer 12

motor

brain to body

Question 13

dorsal root ganglion is on ___ nerves

Answer 13

sensory

off spinal cord before it becomes the ventral ramus/branch (mixed nerve)

Question 14

dorsal root ganglion branch into

Answer 14

dorsal rootlets

Question 15

a nerve is a ___ wrapped in ___

Answer 15

bunch of axons

epinerium

Question 16

axons are wrapped in ____

Answer 16

perinerium

Question 17

nerve fibers are wrapped in

Answer 17

endonerium

Question 18

nerve make up

Answer 18

epinerium- surround group of axons (whole nerve)
perinerium- surround axon
endonerium- surround nerve fibers

Question 19

pseudounipolar

Answer 19

sensory neuron

dorsal root ganglion

sensory input from body -> soma (cell body) –> synapses

Question 20

sensory axons from somatic tissue- somatic nervous system

Answer 20

somatic afferent fibers (SA)

Afferent =Come from Away to brain

Question 21

sensory axons from visceral tissue- autonomic nervous system

Answer 21

visceral afferent fibers

Question 22

motor axons to skeletal muscle SNS

Answer 22

somatic efferent fibers

Question 23

motor axons to smooth muscle, cardiac muscle, glands and adipose tissue

Answer 23

visceral Efferent fibers

Question 24

nerves of brachial plexus

Answer 24

SSMARMU

subscapular
suprascapular
musculocutaneous
axillary
radial
median
ulnar

Question 25

subscapular nerve innervates

Answer 25

subscapularis muscle

Question 26

suprascapular nerve innervates

Answer 26

suprascapularis muscle | infrascapularis muscle

Question 27

musculocutaneous nerve innervates

Answer 27

flexors of elbow biceps brachii brachialis skin of median antebrachium and brachium*

Question 28

axillary nerve innervates

Answer 28

shoulder flexors teres major teres minor deltoideus part of subscapularis (subscapular nerve) skin of lateral brachium, cranial antebrachium and caudal scapula

Question 29

Radial nerve innervates

Answer 29

elbow carpus and digital extensors ATECLUES ``` anconeus triceps brachii extensor carpi radialis common digital extensor lateral digital extensor ulnaris lateralis extensor carpi obliquus supinator ``` skin of cranial and lateral antebrachium and dorsal paw (not 5th digit)

Question 30

Median nerve innervates

Answer 30

carpal and digital flexors PFSDI ``` pronator flexor carpi radialis superficial digital flexor deep digital flexor (also Ulnar) interossei (also unlar) ``` Skin: caudal antebrachium and palmer paw (shares paw pads with ulnar nerve)

Question 31

Ulnar nerve innervates

Answer 31

carpal and digital flexors flexor carpi ulnaris deep digital flexor (part by median) interossei (part by median FDI Skin: caudal antebrachium, pads of palmer paw (shares with median) and lateral surface of 5th digit

Question 32

cell bodies of motor neurons are in

Answer 32

the spinal cord

Question 33

cell bodies of sensory neurons are in

Answer 33

dorsal root ganglion

Question 34

two patterns of nerves coming off spinal cord

Answer 34

segmental | plexal (ventral branches from C6-T1-2 and L4-S3)

Question 35

two plexus

Answer 35

brachial (C6-T1-2) | Lumbosacral (L4-S3)

Question 36

segmental nerves innervate __-

Answer 36

``` axial regions (neck, thorax, abdominal and pelvic regions) ```

Question 37

plexal type innervate

Answer 37

limbs