Arm muscles

Question 1

Triceps brachiosaurus

Answer 1

O: (long head) infraglenoid tubercle or scapula
(Lateral head) superior half of posterior lateral surface of humerus
(Medial head) inferior 2/3 on posterior surface of humerus
I: supraposterior surface of olecranon process of the Imma and deep fascia of the forearm
A: extends forearm at elbow, long head aids in addiction and extension of arm at shoulder
N: radial c6-8

Question 2

Biceps brachii

Answer 2

O: (long head) supraglenoid tubercle of the scapula
(Short head) apex of coracoid process of scapula
I: radial tuberosity and bicipital aponeurosis
A: flex and supinate forearm at elbow
N: muscuocuteneous c5,6

Question 3

Anconeus

Answer 3

O: posterior surface of lateral epicondyle of humerus
I: lateral side of okecranon process and posterior surface of proximal portion of ulna
A: extension and probation of forearm at elbow
N: radial c6-8

Question 4

Brachioradialis

Answer 4

O: prox 2/3 of lateral supracondylar Ridge of humerus and lateral inter muscular septum
I: lateral side of base of styloid process of radius
A: flex forearm probate and supinate at mid position
N: radial c5-7

Question 5

Brachialis

Answer 5

O: lower 1/2 of anterior surface of humerus
I: tiberosity and coronoid of ulna
A: flex forearm
N: branch musculocutaneous c5,6 radial c7

Question 6

Supinator

Answer 6

O: lateral epicondyle of humerus, radial collateral ligament of elbow, annular ligament of radius and supinator crest of ulna
I: oblique line on lateral anterior surface of upper 1/3 of radius
A: supjnates forearm
N: posterior interosseous c5,6

Question 7

Pronator teres

Answer 7

O: humeral head: common flexor tendon from medial epicondyle of humerus and common flexor tendon
Ulnar head: medial side of coronoid process of ulna
I: middle 1/3 of lateral radius
A: probate forearm and flex elbow
N: median c6,7