7.1.06 Pns - Plexuses And Brachial Plexus

Front 1

what are the 4 plexuses?

Back 1

Cervical - Brachial -Lumbar - Sacral

Front 2

the roots of the plexuses arise from?

Back 2

the ventral rami of the spinal nerves

Front 3

which nerves on the ventral rami don't form plexuses

Back 3

T2 - T12

Front 4

T2 - T12 ventral rami innervate

Back 4

intercostal muscles

Front 5

T2 - T12 ventral rami help control

Back 5

breathing

Front 6

cervical plexus arises from

Back 6

ventral rami of spinal nerves C1 - C4

Front 7

pair of nerves that innervate the diaphragm

Back 7

phrenic nerve

Front 8

phrenic nerve is ____ of nerves that innervate

Back 8

pair - superior surface of diaphragm

Front 9

phrenic nerve controls

Back 9

breathing

Front 10

which spinal nerves contribute to the phrenic nerve

Back 10

C3 - C4 - C5

Front 11

the brachial plexus innervates the

Back 11

arm

Front 12

brachial plexus roots arise from

Back 12

ventral rami of spinal nerves C5 - T1

Front 13

root order of the brachial plexus (5)

Back 13

roots - trunks - divisions - cords - peripheral nerve

Front 14

brachial plexus roots arise from ventral rami ____-____

Back 14

C5- T1

Front 15

3 brachial plexus trunks

Back 15

upper - middle - lower

Front 16

2 brachial plexus divisions

Back 16

anterior - posterior of each trunk

Front 17

musculocutaneous nerve innervates

Back 17

elbow flexors

Front 18

musculocutaneous nerve function

Back 18

elbow flexion - supination of forearm

Front 19

median nerve innervates

Back 19

lateral flexors of wrist + fingers

Front 20

median nerve is branches of the ____ and ____ cords

Back 20

lateral - medial

Front 21

median nerve function

Back 21

lateral flexors of wrist - lateral 3.5 fingers

Front 22

what is the action of the Median nerve

Back 22

pincer grasp

Front 23

Patient comes in they lost their ability to pick up a penny with a pincer grasp what nerve do you suspect would be damaged?

Back 23

median nerve with weakness in flexion of the wrist

Front 24

ulnar nerve innervates

Back 24

medial flexors of wrist + fingers

Front 25

ulnar nerve function

Back 25

medial flexors of wrist - medial 1.5 fingers

Front 26

radial nerve innervates

Back 26

entire dorsal side of arm (triceps, wrist, finger extension)

Front 27

radial nerve location

Back 27

deep to "M" - on posterior cord

Front 28

radial nerve function

Back 28

elbow - wrist - finger extension

Front 29

axillary nerve innervates

Back 29

deltoid - teres minor

Front 30

axillary nerve function

Back 30

abduction of arm at shoulder joint

Front 31

medial pectoral nerve innervates

Back 31

pectoralis minor + major

Front 32

medial pectoral nerve function

Back 32

pulls scapula downward & forward (abduct)

Front 33

lateral pectoral nerve innervates

Back 33

pectoralis major

Front 34

lateral pectoral nerve function

Back 34

adducts, flexes & medially rotates humerus at shoulder joint

Front 35

thoracodorsal nerve innervates

Back 35

latissimus dorsi

Front 36

thoracodorsal nerve function

Back 36

extension - medial rotation - adduction of arm at shoulder joint

Front 37

long thoracic nerve innervates

Back 37

serratus anterior

Front 38

long thoracic nerve function

Back 38

holds scapula against chest

Front 39

subscapular nerve innervates

Back 39

subscapularis - teres major

Front 40

subscapular nerve function

Back 40

shoulder stability - medial rotation

Front 41

suprascapular nerve innervates

Back 41

supraspinatus - infraspinatus

Front 42

suprascapular nerve function

Back 42

stabilize shoulder joint