Upper Arm

Question 1

Deltoid

Answer 1

O-embraces insertion of the trapezius; lateral third of clavicle; acromion and spine of scapula

I-deltoid tuberosity of humerus

Question 2

Biceps brachii

Answer 2

O-
short head: coracoid process;
long head: supraglenoid tubercle and lip of glenoid cavity
tendon of long head runs within capsule and into intertubercular sulcus of humerus

I-by common tendon into radi tuberosity

Question 3

Brachialis

Answer 3

O-front of distal humerus; embraces insertion of deltoid muscle

I-coronoid process of ulna and capsule of elbow joiint

Question 4

Triceps brachii

Answer 4

O-
long head: infraglenoid tubercle of scapula
lateral head: posterior shaft of humerus
medial head: posterior humeral shaft distal to radial groove

I-by common tendon into olecranon of ulna