ANATOMY: Shoulder and upper arm

Question 1

what is the sister artery to the radial n.?

Answer 1

deep brachial a.

Question 2

pectoralis minor innervation

what is this from?

Answer 2

medial and lateral pectoral nerves

lateral and medial cords of the brachial plexus

Question 3

teres minor innervation

where does this come from off the brachial plexus?

Answer 3

axillary n.

terminal branch of the posterior cord

Question 4

coracobrachialis innervation

where does this come from on the brachial plexus

Answer 4

musculocutaneus n.

a terminal branch of the lateral cord

Question 5

triceps brachii innervation

where does this come from?

Answer 5

radial n.

comes from a terminal branch of the posterior cord

Question 6

list the boundaries of the triangular space

contents?

Answer 6

teres major, minor, and long head of triceps

circumflex scapular a.

Question 7

biceps brachii innervation

where does this come from on the brachial plexus?

Answer 7

musculocuteneus n.

terminal branch of the lateral cord.

Question 8

what vessel and nerve runs beneath the trapezius?

Answer 8

accessory n.

superficial branch of the transverse cervical a.

Question 9

innervation of teres minor

Answer 9

axillary n.

Question 10

coracobrachialis

attachments, function

Answer 10

o: coracoid process
i: anteriomedial humerus

adduction of arm, flexes arm

Question 11

innervation: pectorals major

where does this come from on the brachial plexus?

Answer 11

medial and lateral pectoral nerves

lateral and medial cords

Question 12

supraspinatus

attachments, function

Answer 12

o: supraspinous fossa
a: greater tubercle (superior facet)

stabilized GHJ, ABDUCTION

Question 13

serratus anterior:

attachments, function

Answer 13

O: ribs
I: medial border scapula (anterior)

Protracts, tilts glenoid up, hods scapula against thorax

Question 14

innervation: levator scapulae

the nerve is a branch off of what?

Answer 14

dorsal scapular n.

C5 nerve root

Question 15

latissimus dorsi

attachments, function

Answer 15

o: lower thoracic ad lumbar spinous processes, ilium
i: ANTERIOR inter tubercular groove humerus (middle facet)

F: Adduction arm, extension arm, medial rotation

Question 16

innervation: latissimus dorsi

where does this come from?

Answer 16

thoracodorsal n.

from the posterior cord of the brachial plexus (middle sub scapular n.)

Question 17

innervation of supraspinatus

Answer 17

suprascapular n.

Question 18

innervation of trapezius

Answer 18

accessory n. (CN 11)

Question 19

brachialis

attachments, function

Answer 19

o: anterior humerus
i: ulnar tuberosity

flexes forearm

Question 20

attachments for supraspinales:

FUNCTION

Answer 20

supraspinous fossa —- greater tubercle humerus (superior facet)

ABDUCTION, stabilization GHJ

Question 21

biceps brachii

attachments, function

Answer 21

o: coracoid, supraglenoid tubercle
i: radial tuberosity

flexes forearm, flexes arm weakly
SUPINATION

Question 22

Impingement of suprascapular n. at ________ notch effects ___________ AND __________!

Impingement of suprascapular n. at __________ notch – yields atrophy of infraspinatus

Answer 22

scapular notch - suprasinatus, infraspinatus

spinoglenoid notch - infraspinatus

Question 23

pectoralis minor

attachments
function

Answer 23

o: ribs
i: coracoid process of scapula

depresses scapula, protracts

Question 24

supraspinatus innervation

where does this come from on the brachial plexus?

Answer 24

suprascapular n.

from the superior trunk (non-terminal branch)

Question 25

list the boundaries of the quadrangular space contents?

Answer 25

teres minor, teres major, long head of the triceps brachii, humerus axillary n., posterior circumflex humeral a.

Question 26

innervation: rhomboids major and minor

Answer 26

dorsal scapular n. C5 nerve root

Question 27

teres minor attachments, function

Answer 27

o: inferior angle scapula i: intertubercular groove of ANTERIOR humerus (most medial facet) adduct arm, extend arm, medially rotate arm (mini latissimus dorsi)

Question 28

pectorals major attachments, function

Answer 28

o: sternum, clavicle i: ANTERIOR inter tubercular groove (most lateral facet) F: medial rotation arm, adducts arm, flexes arm (upper fibers), extends flexed arm (lower fibers)

Question 29

subscapularis innervation where does this come from on the brachial plexus?

Answer 29

upper and lower sub scapular nerve from the posterior cord

Question 30

rhomboids major and minor attachments, function

Answer 30

o: spinous processes C7-T5 i: medial border of scapula F: retract, elevate scapula, tilt glenoid down

Question 31

deltoideus innervation. where does this come from on the brachial plexus?

Answer 31

axillary n. branch off the posterior cord

Question 32

The axillary artery, axillary vein and brachial plexus pass posterior to ___________; any tightness or swelling of the muscle may result in ___________ syndrome

Answer 32

pectoralis minor pectoralis minor syndrome

Question 33

innervation of subscapularis

Answer 33

upper and lower subscapular n.

Question 34

levator scapulae attachments, function

Answer 34

o: cervical transverse processes i: superior angle scapula F: elevation of scapula, tilts glenoid down

Question 35

deltoideus attachments, function

Answer 35

o: spine of scapula, acromion, clavicle i: deltoid tuberosity of humerus ABDUCTION, upper fibers flex arm, lower fibers extend arm

Question 36

innervation of infraspinatus

Answer 36

suprascapular n.

Question 37

what artery runs with the long thoracic n.? what main a. does this branch off of?

Answer 37

lateral thoracic a. axillary a.

Question 38

attachments teres minor: FUNCTION

Answer 38

axillary border scapula --- greater tubercle humerus (inferior facet) lateral rotation, stabilization GHJ

Question 39

infraspinatus attachments, function

Answer 39

o: infraspinous fossa i: greater tubercle, middle facet laterally rotates arm, stabilizes GHJ

Question 40

brachialis innervation where does this come from on the brachial plexus?

Answer 40

musculocutaneus n. terminal branch of the lateral cord

Question 41

serratus anterior innervation. what is this from?

Answer 41

long thoracic nerve nerve roots of C5-7

Question 42

attachments infraspinales: FUNCTION

Answer 42

infraspinous fossa --- greater tubercle humerus (middle facet) lateral rotation, stabilization GHJ

Question 43

buddy artery to the suprascapular n. where does this come from (main a.?)

Answer 43

suprascapular a. branches off the subclavian a. and travels above the scapular ligament and notch

Question 44

innervation: teres minor where does this come from on the brachial plexus?

Answer 44

lower sub scapular n. posterior cord

Question 45

infrapinatus innervation where does this come from off the brachial plexus?

Answer 45

suprascapular n. comes off the superior trunk of the brachial plexus

Question 46

what are the muscles of the rotator cuff?

Answer 46

supraspinales, infraspinalis, teres minor, subscapularis

Question 47

triceps brachii attachments, function

Answer 47

o: posterior humerus, infraglenous tubercle of scapula i: olecranon process extension of forearm, extension of arm (long head)

Question 48

subscapularis attachments, innervation

Answer 48

o: sub scapular fossa i: lesser tubercle humerus medial rotation of arm, stabilization of GHJ

Question 49

attachments and functions trapezius

Answer 49

o: skull, ligamentum nuchae, thoracic spinous processes i: scapular spine, acromion, clavicle a: elevates scapula, depresses scapula, retraction of scapula, rotates glenoid upwards

Question 50

attachments subscapularis: FUNCTION

Answer 50

subscapular fossa --- lesser tubercle humerus medial rotation, stabilization GHJ