Question

Please complete entire table

Muscles of the trunk (posterior):

Muscle	Origin/Insertion	Primary Action
Trapezius	O: occipital bone and spinous processes of all thoracic vertebrae I: clavicle and scapula	Extends neck
Deltoid
Latissimus dorsi

Muscles of the arm and forearm:

Muscle	Origin/Insertion	Primary Action
Biceps brachii	O: scapula I: radius	Flexion at elbow
Brachialis
Brachioradialis
Triceps brachii
Flexor carpi ulnaris
Extensor carpi ulnaris

Answer 1

Muscle	Origin	Insertion	Primary action
Deltoid	Lateral 1/3 rd of the clavicle Acromion Spine of scapula	Deltoid tuberosity of humerus	Flexion and internal rotation of the arm (clavicular) Extension and external rotation of the arm (spinal) Abduction of the arm (acromial)
Latissimus dorsi	The spinous process of 7th thoracic and to 5th lumbar vertebrae Iliac crest of the sacrum Thoracolumbar fascia The inferior angle of the scapula Lower 3 or 4 ribs	The floor of the bicipital groove of the humerus	Adduction of the arm at the shoulder Extension of the arm at the shoulder Internal rotation of the arm at the shoulder
Brachialis	Distal half of anterior surface of the humerus	Coronoid process of the ulna Tuberosity of the ulna	Flexion of the forearm at the elbow
Brachioradialis	The lateral supracondylar ridge of humerus The lateral intermuscular septum of arm	Styloid process of the radius	Forearm flexion at the elbow in the semipronated position
Tricep Brachi	Long head - infraglenoid tubercle of the scapula Medial head - posterior surface of the humerus (inferior to radial groove) Lateral head - posterior surface of the humerus (superior to radial groove)	Olecranon of ulna and fascia of forearm	Extension of the forearm at the elbow joint Extension and adduction of the arm at the shoulder
Flexor carpi ulnaris	Medial epicondyle of humerus Olecranon The posterior border of ulna	Pisiform bone Hamate bone The base of the 5th metacarpal bone	Wrist flexion Wrist adduction
Extensor carpi ulnaris	Lateral epicondyle of humerus Posterior border of ulna	Base of 5th metacarpal bone	Hand extension Hand adduction