Question

Muscle	Origin	Insertion	Action
Latissimus dorsi
Extensor carpi radialis brevis
Triceps brachii
Palmaris longus
Flexor carpi radialis
Rectus femoris
Tibialis anterior

Answer 1

Ans:- 1)

Muscle:- Latissimus dorsi,

Origin:- Spines of inferior thoracic and all lumbar ans sacral vertebrae , thoracolumbar fascia and lower four ribs,

Insertion:- Intertubercular sulcus of the humerus,

Action :- Extends, adducts and rotates arm medially at the shoulder.

2)

Muscle:- Extensor carpi radialis brevis,

Origin:- Lateral epicondyle of the humerus ,

Insertion:- Base of the third metacarpal ,

Action:- Extension of the wrist, abduction of the wrist, weak flexion of the elbow.

3)

Muscle:- Triceps brachii,

Origin:- Inferior margin of glenoid fossa of scapula ,

Insertion:- Olecranon process of ulna,

Action:- Extension of forearm, long head extends and adducts arm,

4)

Muscle:- Palmaris longus,

Origin:- Common flexor tendon from medial epicondyl of humerus , deep to antebrachial fossa,

Insertion:- Flexor retinaculum and palmar aponerurosis ,

Action:- Tenses palmer fascia , flex wrist assits in elbow flexion.

5)

Muscle:- Flexor carpi radialis,

Origin:- Medial epicondyl of humerus,

Insertion:- Base of 2nd metacarpal,

Action:- Flexes and radial deviates the hand .

6)

Muscle:- Rectus femoris,

Origin:- Anterior inferior iliac spine and upper margin of acetabulum,

Insertion:- Quadriceps tendon,

Action:- Hip flexion and sole knee extensor.

7)

Muscle:- Tibialis anterior,

Origin:- Lateral tibia condyle and proximal 2/3 rd of anterolateral tibia,

Insertion:- Medial plantar surface of 1st cuneiform and base of 1st metatarsal,

Action:- Ankle dorsiflexion and foot inversion .