The Axilla & Brachial Plexus III

Question 1

muscles connecting the upper limb to the vertebral column (5)

Answer 1

trapezius
latissimus dorsi
levator scapulae
rhomboid muscles

Question 2

muscles connecting the upper limb to the vertebral column:
trapezius:

nerve(s)

action(s)

Answer 2

accessory nerve (CN XI)

elevate the scapula
retract the scapula
depress the scapula
upward rotation of the scapula (abduction)

Question 3

muscles connecting the upper limb to the vertebral column:
latissimus dorsi:

nerve(s)

action(s)

Answer 3

thoracodorsal n

extends, adducts, & medially rotates the humerus

Question 4

muscles connecting the upper limb to the vertebral column:
levator scapulae:

nerve(s)

action(s)

Answer 4

dorsal scapular n
ventral rami C3 & C4

elevates the scapula
tilts the glenoid cavity downward
retract the scapula

Question 5

muscles connecting the upper limb to the vertebral column:
rhomboid muscles:

nerve(s)

action(s)

Answer 5

dorsal scapular n

retract the scapula
rotate the scapula inferiorly

Question 6

muscles connecting the upper limb tot he throacic wall (3)

Answer 6

serratus anterior m
pectoral m’s
subclavius m

Question 7

muscles connecting the upper limb tot he throacic wall:
serratus anterior:

nerve(s)

action(s)

Answer 7

long thoracic n

protracts the scapula
fixes the scapula
rotates the glenoid cavity upward

Question 8

the scapular muscles (6)

intrinsic ___ muscles

Answer 8

deltoid m
supraspinatous m
infraspinatous m
teres minor m
teres major m
subscapularis m

shoulder

Question 9

the scapular muscles:
deltoid muscle:

nerve(s)

action(s)

Answer 9

axillary n

flex & medially rotate the humerus
abduct the humerus
extend & laterally rotate the humerus

Question 10

the scapular muscles:
supraspinatous:

nerve(s)

action(s)

Answer 10

suprascapular n

abducts the humerus

Question 11

the scapular muscles:
infraspinatous:

nerve(s)

action(s)

Answer 11

suprascapular n

laterally rotates the humerus

Question 12

the scapular muscles:
teres minor:

nerve(s)

action(s)

Answer 12

axillary n

laterally rotates the humerus

Question 13

the scapular muscles:
teres major:

nerve(s)

action(s)

Answer 13

lower subscapular n

extends, adducts, & medially rotates the humerus

Question 14

the scapular muscles:
subscapularis:

nerve(s)

action(s)

Answer 14

upper & lower subscapular n’s

medially rotates the humerus

Question 15

quadrangular space:
borders:

superior: ___ m
inferior: ___ m
medial: long head of the ___ m
lateral: surgical neck of the ___

Answer 15

teres minor

teres major

long head of the triceps brachii

surgical neck of the humerus

Question 16

quadrangular space:
contents:

nerve (1)

artery (1)

Answer 16

axillary n

posterior circumflex humeral a

Question 17

triangular space:
borders:

muscles (3)

Answer 17

teres minor
teress major
long head of triceps brachii

Question 18

triangular space:
contents:

vessels (or their branches) (1)

Answer 18

circumflex scapular vessels (or their branches)

Question 19

traingular interval:
borders:

muscles (2)

shaft of the ___

Answer 19

teres major
long head of the triceps brachii

shaft of the humerus

Question 20

triangular interval:
contents:

nerve (1)

artery (1)

Answer 20

radial n

profunda brachii a