lecture 5

Question 1

Branchial plexus:

1. provide sensory and motor innervation …
2. derived from …
3. general plan is
   a. # roots that consist of what from where to form what

b. # trunk which bifurcate (divide into 2) to do what
c. # divisions which unites what
d. # cords
e. # big nerves, plus numerous smaller ones

Answer 1

1. to upper limb
2. ventral rami of spinal nerves c5-t1
3. a. 5 roots (rami) consisting of ventral rami from c5-t1 unite to form trunks
   b. 3 trunks (upper, middle, lower) which bifurcate to form divisions
   c. 6 divisions(3 anterior, 3 posterior) which unite to form cords
   d. 3 cords (lateral, medial, posterior)
   e. 5 big nerves, plus numerous smaller ones

mnemonic: 5 3 6 3 5

rose the delicious cooked burger

Question 2

the 3 anterior division supploes flexor via what?

Answer 2

via lateral and medial cord

Question 3

the 3 posterior division suplles extensors via what?

Answer 3

posterior cord

Question 4

the 3 posterior division supplies extensors via what?

Answer 4

posterior cord

Question 5

1. where does the 5 roots lie b/w?
2. where 3 trunks cross where?
3. where does the divisions pass posterior to what?
4. 3 cords surround where, posterior where

Answer 5

1. anterior and middle scalene muscle
2. posterior triangle of the neck
3. posterior to clavicle
4. 2nd part of the axillary artery

posterior to pectoralis minor

Question 6

axillary nerve:
1. where is the axillary nerve?

2. it passes what
3. it innervates what?
4. it supplies what with senasation?

Answer 6

axilla

surgical neck of the humerus

deltoid and teres minor

a small patch of skin

Question 7

Radial nerve

1. found where
2. travels where in order to
3. supplies

Answer 7

on the radial (lateral) side of the forearm

travels around the shaft of the humerus in order to innervate the muscles of the posterior compartments of both the arm and forearm

skin over posterior arm, forearm and dorsum of hand with sensation

Question 8

musculocutaneous nerve

travel through what muscle

innverates the muscles of what

continues as awhat nerve to where

Answer 8

travels through the coracobranchilis muscle

innervates the muscles of the anterior compartment of the arm

lateral side of the forearm

Question 9

median nerve

has no what

is the principal nerve to the muscles

travels down the middle of the limb

median nerve supplies what

Answer 9

no branches

of the anterior compartment of the forearm and the thumb

middle of the limb

the index and middle fingers, palmar surface of the thumb and most palm with sensation

Question 10

ulnar nerve

innervate some what

primary nerve to where

travels along what

supplies the skin of what

Answer 10

forarm muscles

primary nerve to the small muscles found in hand

ulnar side of the forearm

ulnar side of hand and little finger and ulnar side of the ring finger with sensation

Question 11

the long thoracic nerve innervates what?

Answer 11

serrratus anterior muscle

Question 12

the dorsal scapular nerve innervates what?

Answer 12

rhomboids and levator scapulae muscles

Question 13

the suprascapular nerve innervates what?

Answer 13

supraspinatus and infraspinatus

Question 14

lateral pectoral nerve branche from where and inneverates?

Answer 14

lateral cord

pectoralis major muscle

Question 15

medial pectoral nerve branches from and innervates?

Answer 15

medial cord

innervates both pectoralis major and pactoralis minor muscles

Question 16

Upper and middle, lower subscapular nerve

1. branches from
2. innervates
3. what is the middle subscapular nerve known as which innervates what?

Answer 16

poaterior cord

upper and lower: innervate subscapularis muscle
lower: innervates the teres major muscle

thoracodorsak nerve or nerve to latissimus dorsi ; latisssimus dorsi muscle

Question 17

medial brancial cutameous and medial antebranchial cutaneous nerves

branches from and suply

Answer 17

medial cord

skin on the medial side of arm and forearm, respectively

Question 18

axilary nerve : the posterior humural circuflex artery can be damaged

Answer 18

by sshoulder dislocation an dsurgical neck fracture

Question 19

radial nerve: profunda(deep) branchii artery can be damaged

Answer 19

humeral shaft fractures

Question 20

motor or sensory and from what cord?

1. upper subscapular nerve
2. middle subsucapular nerve
3. lower subscapular nerve
4. medial pectoral nerve
5. medial branchial cutaneous nerve
6. medial antebranchial cutaneous nerve

Answer 20

1. motor; posterior
2. motor; posterior
3. motor; posterior
4. motor; medial
5. sensory; medial
6. sensory; medial