Primary Muscles - Action and Insertion

Question 1

Scapula Depression

Answer 1

Lower Trapezius

Insertion: Spine of scapula

Question 2

Scapula Elevation

Answer 2

Levator Scapulae

Insertion: Superior angle of the scapula

Question 3

Scapula Retraction

Answer 3

Middle Trapezius

Insertion: Acromion

Question 4

Scapula Protraction

Answer 4

Serratus Anterior

Insertion: Medial margin of the scapula

Question 5

Scapula Upwards Rotation

Answer 5

Serratus Anterior

Insertion: Medial margin of the scapula

Question 6

Scapula Downwards Rotation

Answer 6

Levator Scapulae

Insertion: Superior angle of the scapula

Question 7

Shoulder Abduction

Answer 7

Middle Deltoid

Insertion: Deltoid tuberosity

Question 8

External Rotation of the Shoulder

Answer 8

Infraspinatus

Insertion: Greater tubercle of the humerus

Question 9

Internal Rotation of the Shoulder

Answer 9

Subscapularis

Insertion: Lesser tubercle of the humerus

Question 10

Shoulder Flexion

Answer 10

Anterior Deltoid

Insertion: Deltoid tuberosity

Question 11

Shoulder Extension

Answer 11

Posterior Deltoid

Insertion: Deltoid tuberosity

Question 12

Horizontal Abduction of the Shoulder

Answer 12

Posterior Deltoid

Insertion: Deltoid tuberosity

Question 13

Horizontal Adduction of the Shoulder

Answer 13

pec major

Insertion: Lateral margin of the bicipital groove

Question 14

Shoulder Adduction

Answer 14

Pec major

Insertion: Lateral margin of the bicipital groove

Question 15

Elbow Flexion

Answer 15

Biceps Brachii (supination)
Insertion: Radial tuberosity, and bicipital aponeurosis
Brachioradialis (Thumbs up)
Insertion: Styloid process of the radius

Question 16

Elbow Extension

Answer 16

Triceps Brachii

Insertion: Olecranon

Question 17

Forearm Pronation

Answer 17

Pronator teres

Insertion: Lateral surface of the radius

Question 18

Forearm Supination

Answer 18

Biceps brachii

Insertion: Radial tuberosity, and bicipital aponeurosis

Question 19

Wrist Flexion

Answer 19

Palmaris longus

Insertion: Palmar aponeurosis

Question 20

Wrist Extension

Answer 20

Extensor carpi ulnaris

Insertion: Base metacarpal V

Question 21

Ulnar Deviation

Answer 21

Extensor carpi ulnaris

Insertion: Base metacarpal V

Question 22

Radial deviation

Answer 22

Extensor carpi radialis longus

Insertion: Dorsal surface of metacarpal II

Question 23

Finger Extension

Answer 23

Extensor digitorum

Insertion: Medial and distal phalanges II-V via dorsal aponeurosis

Question 24

Finger Flexion

Answer 24

Flexor digitorum superficialis

Insertion: Middle phalanges II-V

Question 25

Thumb Extension

Answer 25

Extensor pollicis longus | Insertion: Base phalanx distal I

Question 26

Thumb Flexion

Answer 26

Flexor pollicis longus | Insertion: Palmar surface of the distal phalanx I

Question 27

Opposition

Answer 27

Opponens | Insertion: Radial border metacarpal I

Question 28

Ankle Plantar Flexion

Answer 28

Gastrocnemius Insertion: Calcaneal tuberosity via the Achilles tendon Soleus (knee flexion) Insertion: Achilles Tendon

Question 29

Ankle Dorsi Flexion

Answer 29

Tibialis Anterior | Insertion: Medial cuneiform and first metatarsal

Question 30

Subtalar Eversion

Answer 30

Fibularis longus | Insertion: Base of metatarsal 1 and medial cuneiform

Question 31

Subtalar Inversion

Answer 31

Tibialis anterior | Insertion: Medial cuneiform and first metatarsal

Question 32

Interphalangeal Flexion

Answer 32

Flexor digitorum longus | Insertion: Bases of the distal phalanges 2-5

Question 33

Interphalangeal Extension

Answer 33

Extensor digitorum longus | Insertion: Middle and distal phalanges of toes II-V

Question 34

Hip Flexion

Answer 34

Iliopsoas | Insertion: Lesser trochanter

Question 35

Hip Extension

Answer 35

Gluteus Maximus Insertion: Upper fibers: iliotibial tract on Gerdy’s tubercle (tibia) Lower fibers: gluteal tuberosity of femur

Question 36

Hip Abduction

Answer 36

Gluteus Medius | Insertion: Greater trochanter

Question 37

Hip Adduction

Answer 37

Adductor longus | Insertion: Lower two-thirds of the medial lip of the linea aspera on the posterior surface

Question 38

Hip Internal Rotation

Answer 38

Gluteus medius | Insertion: Greater trochanter

Question 39

Hip External Rotation

Answer 39

Gluteus Maximus Insertion: Upper fibers: iliotibial tract on Gerdy’s tubercle (tibia) Lower fibers: gluteal tuberosity of femur

Question 40

Knee Flexion

Answer 40

``` Biceps Femoris I: Head of fibula Semitendinosus I: Medial border of the tibia (pes anserinus tendon) Semimembranosus I: Medial tibial condyle ```

Question 41

Knee Extension

Answer 41

Rectus Femoris | I: Anterior Tibial Tuberosity (Quadriceps tendon)