origin insertion action

Question 1

Occipitofrontalis: insertion and action

Answer 1

Insertion: Epicranial aponeurosis, skin superior to supraorbital margin

Action: Draws scalp anterior (raises eyebrows) posterior

Question 2

Orbicularis oris: action

Answer 2

closes lips

Question 3

Orbicularis Oculi: action

Answer 3

closes eyes

Question 4

Zygomaticus major: origin

Answer 4

zygomatic bone

Question 5

Levator labii superioris: action

Answer 5

Elevates upper lip

Question 6

Depressor labii inferioris: action

Answer 6

depresses lower lip

Question 7

Superior rectus: action

Answer 7

Elevates eyeball

Question 8

Medial rectus: action

Answer 8

Adducts eyeball

Question 9

Inferior rectus: action

Answer 9

Depresses eyeball

Question 10

Lateral rectus: action

Answer 10

Abducts eyeball

Question 11

Masseter: origin, insertion, action

Answer 11

Origin: Zygomatic arch & maxilla

Insertion: Ramus and angle of mandible

Action: Elevates mandible

Question 12

Lateral pterygoid: action

Answer 12

Depression of mandible & moves mandible side to side

Question 13

Sternocleidomastoid: Origin, insertion, action

Answer 13

Origin: Manubrium of sternum and clavicle

insertion: Mastoid process

Action: Both: flexion of cervical vertebrae. Individually: lateral rotation of head.

Question 14

Pectoralis Major: origin, insertion, action

Answer 14

Origin: Clavicle, sternum, & costal cartilage

Insertion: Greater tubercle & Intertubercular sulcus of humerus

Action: Flexes, adducts, rotates humerus (arm) @ shoulder

Question 15

Levator Scapulae: origin, insertion, action

Answer 15

Origin: Transverse process of C1-C4

insertion: Superior border of scapula

Action: Elevates scapula

Question 16

Latissimus dorsi: Origin, action, insertion

Answer 16

Origin: T7-L5 vertebrae, iliac crest

Insertion: Intertubercular sulcus of humerus

Action: Adducts, extends, and rotates humerus (arm) @ shoulder

Question 17

Deltoid: Origin, insertion, action

Answer 17

Origin: Acromion process, spine of scapula, clavicle

Insertion: Deltoid tuberosity of humerus

action: Abducts, flexes and extends humerus (arm) @ shoulder

Question 18

Biceps Brachii: Origin, insertion, action

Answer 18

Origin: Glenoid cavity and coracoid process

Insertion: Radial tuberosity

Action: Flexion of arm @ shoulder and flexion of forearm @ elbow

Question 19

Brachioradialis: Origin, insertion, action

Answer 19

Origin: Humerus

Insertion: Lateral surface of radius

Action: Flexion of forearm @ elbow

Question 20

Triceps Brachii: Origin, insertion, action

Answer 20

Origin: Glenoid cavity and humerus

Insertion: Olecranon of ulna

Action: Extends forearm @ elbow

Question 21

Supinator: Origin, insertion, action

Answer 21

Origin: Lateral epicondyle of humerus

Insertion: Lateral surface of radius

Action: Supinates forearm

Question 22

Flexor Carpi Radialis: origin, insertion, action

Answer 22

Origin: Medial epicondyle of humerus

Insertion: Metacarpals II-III

Action: Flexes and abducts hand @ wrist

Question 23

Extensor Carpi Radialis Longus: origin, insertion, action

Answer 23

Origin: Lateral supracondylar ridge of humerus

Insertion: Metacarpal II

Action: Extends and abducts hand @ wrist

Question 24

Pronator Teres: O, I, A

Answer 24

Origin: Medial epicondyle of humerus and coronoid process of ulna

Insertion: Radius

Action: Pronates forearm

Question 25

Flexor Carpi Ulnaris: O, I, A

Answer 25

Origin: Medial epicondyle of humerus Insertion: Pisiform, hamate, metacarpal V Action: Flexes and adducts hand @ wrist

Question 26

Flexor Digitorum Superficialis: O, I, A

Answer 26

Origin: Medial epicondyle of humerus Insertion: Middle phalanges Action: Flexes phalanges & hand @ wrist

Question 27

Extensor Digitorum: O, I, A

Answer 27

Origin: Lateral epicondyle of humerus Insertion: Distal and middle phalanges Action: Extends phalange & hand @ wrist

Question 28

Gluteus Maximus: O, I, A

Answer 28

Origin: Iliac crest, coccyx, and sacrum Insertion: Greater trochanter of femur via iliotibial tract Action: Extends & rotates thigh @ hip

Question 29

Tensor Fasciae Latae: O, I , A

Answer 29

Origin: Iliac crest Insertion: Tibia via iliotibial tract Action: Flexes & abducts thigh @ hip

Question 30

Adductor Longus: O, I, A

Answer 30

Origin: Pubic crest and symphysis Insertion: Linea aspera of femur Action: Adducts, rotates, & flexes thigh @ hip

Question 31

Gracilis: O, I, A

Answer 31

Origin: Body and inferior ramus of pubis Insertion: Tibia Action: Adducts & rotates thigh @ hip, and flexes lower leg @ knee

Question 32

Rectus Femoris: O, I, A

Answer 32

Origin: Anterior inferior iliac spine Insertion: Patella and tibial tuberosity Action; Extends lower leg @ knee & flexes thigh @ hip

Question 33

Vastus Lateralis, Vastus Medialis, Vastus Intermedius: | Action

Answer 33

Action: Extends lower leg @ knee

Question 34

Semimembranosus: O, I, A

Answer 34

Origin: Ischial tuberosity Insertion: Medial condyle of tibia Action: Flexes lower leg @ knee & thigh @ hip

Question 35

Biceps Femoris: O, I, A

Answer 35

Origin: Ischial tuberosity and linea aspera Insertion: Head of fibula Action: Flexes lower leg @ knee & extends thigh @ hip

Question 36

Extensor Digitorum Longus: A

Answer 36

Action: Extends toes, dorsiflexes foot

Question 37

Flexor Digitorum Longus: A

Answer 37

Action: Flexes toes & plantar flexes foot

Question 38

Gastrocnemius: O, I, A

Answer 38

Origin: Condyles of femur Insertion: Calcaneus via calcaneal (Achilles) tendon Action: Plantar flexes foot @ ankle & flexes lower leg @ knee