Muscles Origin, Insertion, and Action

Question 1

Latissimus Dorsi

Origin:
Insertion:
Action:

Answer 1

Origin: lumbar vertabra
Insertion: Humerous
Action: arm extention, and rotates the arm, for punching

Question 2

Masseter

Origin:
Insertion:
Action:

Answer 2

Origin: Zygomatic Bone
Insertion: Angle of the ramus
Action: Closes the jaw

Question 3

Sternocleidomastoid

Origin:
Insertion:
Action:

Answer 3

Origin: sternum and medial portion of the clavicle
Insertion: mastoid process
Action: flexion of the head and rotation of head towards shoulders

Question 4

Digastric

Origin:
Insertion:
Action:

Answer 4

Origin: mandible and mastoid process
Insertion: hyoid bone
Action: open mouth and depress mandible

Question 5

Pectoralis Major

Origin:
Insertion:
Action:

Answer 5

Origin: clavicle, sternum, ribs
Insertion: humerous
Action: arm flexion and medially rotates arm, pulls chest upward

Question 6

Deltoid

Origin:
Insertion:
Action:

Answer 6

Origin: Clavicle, acromion and spine of scapula
Insertion: deltiod tuberosity of humerous
Action: arm abduction

Question 7

Pectoralis Minor

Origin:
Insertion:
Action:

Answer 7

Origin: ribs
Insertion: corocoid process of the scapula
Action: draws scapula forward and inferiorly

Question 8

Trapezius

Origin:
Insertion:
Action:

Answer 8

Origin: occipital bone
Insertion: acromion and spine of scapula and clavicle
Action: stabilizes, elevates, rotates, and retracts scapula and extends the head

Question 9

Biceps Brachii

Origin:
Insertion:
Action:

Answer 9

Origin: corocoid process of the scapula
Insertion: radial tuberosity
Action: flexion and supination of the arm

Question 10

triceps brachii

Origin:
Insertion:
Action:

Answer 10

Origin: radial groove
Insertion: olecranon of ulna
Action: forearm extensor

Question 11

Sartorious

Origin:
Insertion:
Action:

Answer 11

Origin: iliac spine
Insertion: tibia
Action: flexes, abducts, and laterally rotates thigh

Question 12

rectus femoris

Origin:
Insertion:
Action:

Answer 12

Origin: iliac spine
Insertion: tibial tuberosity and patella
Action: extends leg and flexes thigh

Question 13

Gracilis

Origin:
Insertion:
Action:

Answer 13

Origin: ramus and body of pubis
Insertion: tibia
Action: adducts thigh; flexes and medially rotates leg

Question 14

extensor digitorum longus

Origin:
Insertion:
Action:

Answer 14

Origin: tibia; interossesous membrane
Insertion: phalanges
Action: toe extension

Question 15

Stylohyoid

Origin:
Insertion:
Action:

Answer 15

Origin: Styloid Process
Insertion: Hyoid bone
Action: Elevates and retracts hyoid bone

Question 16

Mylohyoid

Origin:
Insertion:
Action:

Answer 16

Origin: mandible
Insertion: hyoid bone
Action: elvates hyoid bone

Question 17

Sternohyoid

Origin:
Insertion:
Action:

Answer 17

Origin: manubrium and clavicle
Insertion: Hyroid Bone
Action: depresses larynx and hyoid bone

Question 18

Sternothyroid

Origin:
Insertion:
Action:

Answer 18

Origin: manubrium
Insertion: Thyroid cartilidge
Action: depresses larynx and hyoid bone

Question 19

Omohyoid

Origin:
Insertion:
Action:

Answer 19

Origin: scapula
Insertion: hyoid bone
Action: depresses and retracts hyoid bone

Question 20

Thyrohyoid

Origin:
Insertion:
Action:

Answer 20

Origin: thyroid cartilidge
Insertion: hyoid bone
Action: depresses hyoid bone

Question 21

Iliopsoas

Origin:
Insertion:
Action:

Answer 21

Origin: sacrum
Insertion: femur
Action: thigh flexion