Muscle Actions

Question 1

Closes and puckers lips

Answer 1

Orbicularis oris

Question 2

Pulls angle of mouth upwards

Answer 2

Zygomaticus

Question 3

Helps masseter raise the mandible

Answer 3

Temporalis

Question 4

Compresses cheeks

Answer 4

Buccinator

Question 5

Pair of Neck muscles that flex head

Answer 5

Sternocleidomastoid

Question 6

Pair of muscles that extend head

Answer 6

Splenius capitus

Question 7

Innermost muscle of abdominal wall

Answer 7

Transversus abdominis

Question 8

Raises ribs during inspiration

Answer 8

external intercostals

Question 9

Elevates Clavicle and scapula

Answer 9

Trapezius

Question 10

Draws scapula downward and anteriorly

Answer 10

Pectoralis minor

Question 11

Adducts and draws humerus across chest

Answer 11

pectoralis major

Question 12

Sheetlike muscle of lower back that adducts and extends humerus

Answer 12

Latissimus dorsi

Question 13

Abducts, flexes and extend humerus

Answer 13

Deltoid

Question 14

flexion vs. extension of shoulder

Answer 14

Flexion is forward Extension is backwards

Question 15

Rotates humerus laterally

Answer 15

Infraspinatus

Question 16

Assists Deltoid in abducting Humerus

Answer 16

Supraspinatus

Question 17

Rotator Cuff muscles (4) (S.I.T.S), function, Location (O-I)

Answer 17

1) Infraspinatus (I = greater tubercle humerus)
2) Supraspinatus (I = greater tubercle humerus)
3) Subscapularis (I = lesser tubercle humerus)
4) Teres Minor (I = greater tubercle humerus. O = Lateral border of scapula)

Stabilizing the shoulder, also elevates and rotates the arm.

Each muscle originates on the scapula, and inserts on the humerus.

Question 18

Assists Lasissimus Dorsi

Answer 18

Teres major

Question 19

Assists biceps brachii (2 muscles)

Answer 19

Brachialis Brachioradialis

Question 20

Extends forearm

Answer 20

Triceps brachii

Question 21

Flexes and rotates forearm laterally

Answer 21

Biceps brachii

Question 22

Flexes and abducts wrist

Answer 22

Flexor carpi radialis

Question 23

Flexes and adducts wrist

Answer 23

Flexor carpi ulnaris

Question 24

Adducts, flexes, and rotates thigh laterally (3 muscles)

Answer 24

Adductor Longus, Adductor Magnus, Adductor brevis

Question 25

Abducts and rotates thigh medially

Answer 25

Gluteus medius

Question 26

Extends and rotates thigh laterally

Answer 26

Gluteus Maximus

Question 27

Extension vs. Flexion of thigh

Answer 27

Extension towards back Flexion towards front

Question 28

Flexes and abducts thigh

Answer 28

Tensor fasciae Latae

Question 29

Flexes thigh only (2 muscles)

Answer 29

Iliacus Psoas major

Question 30

Flexes leg and thigh

Answer 30

Sartorius

Question 31

Flexes leg and adducts thigh

Answer 31

Gracilis

Question 32

Group of four muscles that extend leg

Answer 32

Quadriceps Femoris (1)Biceps Femoris, 2)Vastus lateralis, 3)Vastus Medialis, 4)Vastus intermedius = main function is knee extension) Knee Extension [1, 2, 3, 4] Hip Flexion [1] O = Illiac Spine [1] Grater throcanter [2] Interthrocanteric line [3], Anterior proximal Surface femur [4] I = Tibia Tuberosity [1, 2, 3, 4] through Patellar Tendon

Question 33

Three muscles that flex the leg and extends thigh

Answer 33

1. Biceps femoris 2. Semitendinosus 3. Semimembranosus

Question 34

Dorsiflexes and Inverts foot

Answer 34

Tibialis anterior

Question 35

Flexes leg and plantar flexes foot

Answer 35

Gastrocnemius

Question 36

Extends Toes and dorsiflexes and everts foot

Answer 36

Extensor digitorum longus

Question 37

Plantar flexes and everts foot

Answer 37

Fibularis longus