Muscle Origins + Insertions

Question 1

Subscapularis (Rotator Cuff Anterior)

Answer 1

Origin: Subscapular Fossa

Insertion: Lesser Tubercle Of Humerus

Action: Extends + Medially Rotates Arm

Question 2

Supraspinatus
Infraspinatus
Teres Minor
Teres Major
(Rotator Cuff Posterior)

Answer 2

Origin:
Supraspinatus; Supraspinous Fossa
Infraspinatus; Infrapinous Fossa
Teres Minor; Scapula
Teres Major; Scapula

Insertion: Humerus

Action: Circumduction

Question 3

Deltoid

Answer 3

Origin: Clavicle, Acrominon + Spine Of Scapula

Insertion: Humerus, Deltoid Tuberosity

Action: Abducts Arm

Question 4

Iliopsoas

Answer 4

Origin: T12 + Lumber Vertebrae

Insertion: Lesser Tubercle Of Femur

Action: Hip + Lumbar Flexion

Question 5

Gluteus Medius

Answer 5

Origin: Outer Ilium

Insertion: Greater Tubercle Of Femur

Action: Abducts Thigh + Medial Rotation Of Thigh

Question 6

Gluteus Maximus

Answer 6

Origin: ilium, Sacrum, Coccyx

Insertion: Gluteal Tuberosity Of Femur, Lateral Condyle Of Tibia

Action: Extension, Abduction, & Laterally Rotates Thigh

Question 7

Brachialis

Answer 7

Origin: Anterior, Distal Humerus

Insertion: Coronoid Process Of Ulna

Action: Forearm Flexion

Question 8

Biceps Brachii

Answer 8

Origin: Supraglenoid Tubercle + Corocoid Process

Insertion: Radial Tuberosity

Action: Arm Flexion

Question 9

Triceps Brachii

Answer 9

Origin: Infraglenoid Tubercle + Humerus

Insertion: Olecranon Process + Ulna

Action: Extension Of Arm

Question 10

Sternocleidomastoid

Answer 10

Origin: Manbrium, Sternal Head Of Clavicle

Insertion: Mastoid Process

Action: Flexion Of Neck

Question 11

Rectus Femoris

Answer 11

Origin: Anterior Inferior iliac Spine

Insertion: Tibial Tuberosity

Action: Leg Extension

Question 12

Vastus - Lateralis + Intermedius + Medialis

Answer 12

Origin: Greater Trochanter

Insertion: Tibial Tuberosity

Action: Leg Extension

Question 13

Tibialis Anterior

Answer 13

Origin: Lateral Tibia

Insertion: First Metatarsal + Medial Cuneiform

Action: Dorsi-Flexion

Question 14

Soleus

Answer 14

Origin: Posterior Tibia + Fibula

Insertion: Calcaneus

Action: Planter-Flexion

Question 15

Gastrocnemius

Answer 15

Origin: Lateral + Medial Condyles Of Femur

Insertion: Calcenous

Action: Planter-Flexion

Question 16

Adductor - Magnus, Brevis, Longus

Answer 16

Origin: Pubis (Magnus - Ischium)

Insertion: Linea Aspera Of Femur

Action: Lateral Rotation + Adduction Of Thigh

Question 17

Biceps Femoris

Answer 17

Origin: Ischial Tuberosity (Long)
Linea Aspira Of Femur (Short)

Insertion: Lateral Tibia + Head Of Fibula

Action: Extension Of Thigh

Question 18

Semimembranosus
Semitendinosus

Answer 18

Origin: Ischial Tuberosity

Insertion: Medial Tibia

Action: Thigh Extension

Question 19

Trapezius

Answer 19

Origin: Occipital + C7 - T12

Insertion: Clavicle, Acrominon + Spine Of Scapula

Action: Extension Of Head + Abduction

Question 20

Latissimus Dorsi

Answer 20

Origin: Ribs 10 - 12, Sacrum, ilium, T7 - T12, L1 - L5

Insertion: Intertubercular Groove Of Humerus

Action: Inferiorly Pulls Shoulder

Question 21

Pectoralis Minor

Answer 21

Origin: Ribs 3 - 5

Insertion: Coracoid Process Of Scapula

Action: Depresses Scapula

Question 22

Pectoralis Major

Answer 22

Origin: Clavicle, Sternum, Ribs 1 - 7

Insertion: Greater Tubercle Of Humerus

Action: Flexion + Adduction + Medial Rotation Of The Arm