Muscle Action

Question 1

Depressor Anguli Oris

Answer 1

Depresses Corner of Mouth: Major “Frowning Muscle”

Question 2

Levator Labii Superioris

Answer 2

Raises Upper Lip & Flares Nostrils

Question 3

Levator Anguli Oris

Answer 3

“Smiling Muscle”

Question 4

Mentalis

Answer 4

Wrinkles Chin & Protrudes Lower Lip “Pouty Lip”

Question 5

Platysma

Answer 5

Depresses Mandible & Lower Lips

Question 6

Corrugator Supercilii

Answer 6

Draws Eyebrows Together & Forms Vertical Wrinkle

Question 7

Pterygoid-Medial

Answer 7

Closes Lower Jaw & Clenches Teeth

-Synergist of Masseter & Temporalis

Question 8

Pterygoid-Lateral

Answer 8

Protraction of Mandible

Question 9

Sternocleidomastoid

Answer 9

Prime Mover: Neck Flexion & Lateral Neck Flexion

Question 10

Pectoralis Minor

Answer 10

Protracts & Depresses Scapula

Question 11

Serratus Anterior

Answer 11

Prime Mover: Protracts Scapula

Question 12

Levator Scapulae

Answer 12

Elevate Scapula & Rotates Down

Question 13

Trapezius

Answer 13

Extends Head & Elevates Scapula

Question 14

Latissimus Dorsi

Answer 14

Prime Mover: Arm Extension

-Arm adductor

Question 15

Pectoralis Major

Answer 15

Prime Mover: Arm Flexion

-Arm Adductor

Question 16

Deltoid

Answer 16

Prime Mover: Arm Abduction

Question 17

Coracobrachialis

Answer 17

Adducts & Flexes Arm

Question 18

Teres Major

Answer 18

Adducts Arm
Extends Arm
Medially Rotates Arm

Question 19

Extensor Digitorum

Answer 19

Prime Mover: Finger Extension

-Finger Abduction

Question 20

Anconeus

Answer 20

Extends Forearm

- Stabilizes Elbow Joint

Question 21

Iliacus

Answer 21

Prime Mover: Hip Flexion

Question 22

Psoas Major

Answer 22

Prime Mover: Hip Flexion

-Lateral Vertebral Flexion; Posture

Question 23

Sartorius

Answer 23

Flexes Thigh
Laterally Rotates Thigh
-Flexes Knee

Question 24

Gluteus Maximus

Answer 24

Prime Mover: Hip Extension

  - Laterally Rotates Thigh
  - Antagonist of iliopsoas

Question 25

Gluteus Medius

Answer 25

Prime Mover: Hip Abduction | - Medially Rotates Thigh

Question 26

Tensor Fasciae Latae

Answer 26

Abducts Thigh | Medially Rotates Thigh

Question 27

Hamstrings

Answer 27

Prime Mover: Thigh Extension & Knee Flexion

Question 28

Quadriceps Femoris

Answer 28

Prime Mover: Knee Extension & Thigh Flexion

Question 29

Extensor Digitorum Longus

Answer 29

Prime Mover: Toe Extension

Question 30

Tibialis Anterior

Answer 30

Prime Mover: Dorsiflexion | -Inversion

Question 31

Gastrocnemius

Answer 31

Prime Mover: Plantarflexion | -Knee flexion when in Dorsiflex

Question 32

Soleus

Answer 32

Prime Mover: PlantarFlexion

Question 33

Fibrous Joints [3]

Answer 33

1) Gomphoses: Teeth Roots 2) Suture Lines: Skull Bones - Synostoses: Complete Fusion of Suture Line 3) Syndesmoses: Bones Connected via Fibrous-Sheeths - Interosseus Membrane

Question 34

Cartilaginous Joints [2]

Answer 34

1) Synchondroses: Joined via Hyaline Cartilage - Epiphyseal Plate, Rib 1-Sternum Cartilage 2) Symphyses: Fibrocartilage Pad Between Bones - Intervertebral Discs, Pubic Symphysis

Question 35

Synovial Joints [6]

Answer 35

Bone Ends Connected by Synovial-Filled Joint Cavity | Planar/Gliding, Hinge, Pivot, Condyloid, Saddle, Ball-in-Socket