Arm Cubital Fossa

Question 1

Biceps brachii short head origin

Answer 1

coracoid process of scapula

Question 2

biceps brachia long head origin

Answer 2

supraglenoid tubercle of scapula

Question 3

long head tendon of biceps brachia runs through what structure ?

Answer 3

intertubucular groove of humerus

Question 4

insertions of biceps brachii

Answer 4

radial tuberosity (near head) and bicipital aponeurosis (to fascia)

Question 5

actions of biceps brachii at elbow joint

Answer 5

primarily flexion, plus some supination

Question 6

actions of biceps brachii at shoulder joint

Answer 6

short head: flexion

long head: abduction

Question 7

innervation of biceps brachii

Answer 7

musculocutaneous nerve (C5-C7)

Question 8

origin of coracobrachalis

Answer 8

origin at coracoid process

Question 9

insertion of coracobrachialis

Answer 9

insertion on humerus, medially

Question 10

innervation of coracobrachialis

Answer 10

musculocutaneous (C5-C7)

Question 11

origin of brachialis

Answer 11

origin on humerus, anterior surface

Question 12

insertion of brachialis

Answer 12

insertion on ulna, tuberosity and coronoid process

Question 13

actions of brachialis at elbow joint

Answer 13

flexion

Question 14

innervation of brachialis

Answer 14

musculocutaneous nerve (C5-C7)

Question 15

musculocutaneous nerve

Answer 15

motor: arm anterior compartments, flexors
muscles: biceps, coracobrachialis, brachialis,
sensory: musculocutaneous nerve continues as lateral ante brachial cutaneous nerve

Question 16

triceps long head origin:

Answer 16

infraglenoid tubercle of scapula

Question 17

triceps lateral head origin:

Answer 17

humerus (superior aspect)

Question 18

medial head origin

Answer 18

humerus, below radial groove

Question 19

insertion of triceps all heads

Answer 19

olecranon of ulna

Question 20

anconeus origin

Answer 20

lateral epicondyle

Question 21

anconeus insertion

Answer 21

olecranon of ulna

Question 22

innervation of anconeus

Answer 22

radial nerve

Question 23

radial nerve (from posterior cord C5-T1)

Answer 23

branches in the arm, forearm, and hand

motor: anterior compartment of forearm, hand

Muscles: mostly extensors of arm, wrist, fingers

Sensory: cutaneous territory in arm, forearm, hand

Clinical significance: compression injury at axilla

Question 24

explain sensory reflex test? bicep and tricep

Answer 24

tap, stretch tendon, send info back to spinal cord….C5 and C6 of biceps reflex reflex contraction

C7= tricep

Question 25

Clinical implications with fascial compartments?

Answer 25

compartment syndromes: increases in mass/volume/pressure within one compartments can rapidly compress or damage structures within that compartment, for example edema, bleeding.

Adds mass and pressure, cause ischemia, nerve damage

Question 26

Axilla artery is the blood supply to what component. What does the axilla artery turn into

Answer 26

supplies upper extremity, with a name change to the brachial artery that continues through the arm and cubital fossa to forearm where it bifurcates in the radial and ulnar arteries