muscles of the arm

Question 0

Biceps Brachii insertion

Answer 0

tuberosity of radius and fascia of forearm via bicipital aponuerosis

Question 1

Biceps Brachii origin

Answer 1

short head: tip of coracoid process of scapula

long head: supraglenoid tubercle of scapula

Question 2

biceps Brachii innervation

Answer 2

musculocutaneous nerve C5, C6

Question 3

Biceps Brachii actions

Answer 3

supinates forearm
when supinated flexes elbow joint
flexes shoulder joint
short head resists dislocation of shoulder

Question 4

Brachialis origin

Answer 4

distal half of anterior surface of humerus

Question 5

brachialis insertion

Answer 5

coronoid process and tuberosity of ulna

Question 6

brachialis innervation

Answer 6

musculocutaneous nerve C5, C6

Question 7

brachialis action

Answer 7

flexes the elbow joint in all positions

Question 8

coracobrachialis origin

Answer 8

coracoid process of scapula

Question 9

coracobrachialis insertion

Answer 9

middle third of the medial surface of the humerus

Question 10

coracobrachialis innervation

Answer 10

musculocutaneous nerve

Question 11

coracobrachialis action

Answer 11

helps flex and adduct shoulder joint and prevents dislocation

Question 12

triceps brachii origin

Answer 12

long head: infraglenoid tubercle of scapula
lateral head: posterior surface of humerus superior to radial groove
medial head: posterior surface of humerus inferior to radial groove

Question 13

triceps brachii insertion

Answer 13

proximal end of olecranon of ulna and fascia of forearm

Question 14

triceps brachii innervation

Answer 14

radial nerve C6,7,8

Question 15

triceps brachii action

Answer 15

chief extensor of the elbow joint
long head extends shoulder joint
resists dislocation of humerus (especially important during abduction)

Question 16

anconeus origin

Answer 16

lateral epicondyle of humerus

Question 17

anconeus insertion

Answer 17

lateral surface of olecranon and superior part of posterior surface of ulna

Question 18

anconeus innervation

Answer 18

radial nerve

Question 19

anconeus action

Answer 19

assists triceps in extending elbow joint
stabilizes elbow joint
abducts ulna during pronation