Neurovasculature

Question 1

brachial plexus from:

Answer 1

anterior ventral rami C5-T1 they are the ROOTS

Question 2

Root of brachial plexus found

Answer 2

between anterior and middle scalenes (or slightly above clavicle)

turn into trunks

Question 3

Trunks travels under what and then splits into divisions?

Answer 3

first rib under clavicle then crosses into the axilla as 3 anterior and 3 posterior. Most anterior mingle and end up in flexor compartment

Question 4

Cords and terminal branches is close to which artery and where is it?

Answer 4

Axillary artery in the axilla near armpit)

Question 5

What roots innervate musculotaneous

Answer 5

c567

Question 6

What roots innervate axillary

Answer 6

c56

Question 7

What roots innervate radial

Answer 7

everything

Question 8

What roots innervate median

Answer 8

everything

Question 9

What roots innervate ulnar

Answer 9

c8 t1

Question 10

shoulder joint with abduct and flex has myotome

Answer 10

c5

Question 11

shoulder with adduct and extend has myotome

Answer 11

c6 and c7

Question 12

elbow with flexion has myotome

Answer 12

c5 c6

Question 13

elbow with extension has myotome

Answer 13

c7 c8

Question 14

wrist with flexion and extension has myotome

Answer 14

c6 c7

Question 15

muscultaneous pierces what muscle

Answer 15

coracobrachialis

Question 16

median nerve travel with which artery

Answer 16

brachial

Question 17

M shape (signals end of cords) turn into what three branches

Answer 17

most medial to lateral: Ulnar, median, musculotaneous

Question 18

axillary nerve course

Answer 18

posterior to axillary artery

exits axilla via quandrangular space with posterior circumflex humeral artery

Question 19

Where is injury seen when a nerve is squahed?

Answer 19

distal

Question 20

musculotaneous course

Answer 20

lateral to axillary artery

pierces coracobrachilais
sits between biceps brachii and brachialis (supplies all of them)

Question 21

Muscultaneous nerve changes name as it goes down. When and what is it?

Answer 21

Reach cubital fossa, becomes lateral cutaneous nerve of the forearm (skin innervation, no more muscle)

Question 22

median nerev course

Answer 22

Close to brachial artery

between two heads of pronator teres

deep to flexor digitorum superficialis

supplies all flexor of forearm except flexor carpi ulnaris and half of flexor digitorum profundus

Question 23

Median nerve has a branch, what is it

Answer 23

anterior interosseous nerve

Question 24

What happens when median nerve arrive at wrist?

Answer 24

It is only nerve to go thru carpal tunnel
- under flexor retinaculum
- inflammed muscle squah this nerve

It also divides into a palmar branch at wrist joint

innervates the thenar muscles (via reccurent branch of median nerve CANNOT be just reccurent), and two lumbrical of fingers (index and middle)

reccurent branch is motor, rest is all sensory and motor

Question 25

The median nerve divides into the palmar branch at the wrist joint, does it both go under the flexor retinaculum?

Answer 25

No, palmar goes above it because it supplied skin of palm

Question 26

Ulnar nerve course

Answer 26

medial to the brachial artery posterior to the medial humeral epicondyle only supplies forearm, because fuck the arm at the forearm, it goes between two heads of flexor carpi ulnaris, superficial to profundus it is medial to ulnar artery

Question 27

ulnar divides into three branches in the forearm what is it and what they do

Answer 27

muscular: two muscles in anterior forearm palmar and dorsal branch is sensory to skin (dorsal is lateral to hand, closer to pinky side arrives at guyon's canal with ulnar artery and veins, innervate all hands except the first and second lumbrical, and the thenar muscle

Question 28

ulnar nerve enters the wrist where? where does it branch?

Answer 28

ulnar/guyon canal deep motor and deep sensory branch just distal to pisiform except palmaris brevis muscle is via superficial ulnar nerve

Question 29

radial nerve course

Answer 29

posterior to axillary artery radial groove of humerus between medial and lateral head of triceps travels to the back of arm via triangular interval and travels with profunda brachii artery

Question 30

radial nerve at forearm course?

Answer 30

superifical branch and deep branch, sensory and motor respectively They come anterior a bit in cubital fossa (lateral epicondyle might squash them) goes back by piercing supinator

Question 31

branch of radial nerve?

Answer 31

posterior interosseous nerve

Question 32

radial nerve at hand course?

Answer 32

Superficial branch pass into the hand over anatomical snuff box DEEP NOTHING TO DO WITH THE HAND

Question 33

hand of beediction (gun shape) which nerve stop working

Answer 33

median

Question 34

claw hand which nerve stop working

Answer 34

ulnar

Question 35

wrist drop which nerve stop working?

Answer 35

radial (loss of extensors)