Muscles

Question 0

Zygomaticus

Answer 0

Origin: Zygomatic
Insertion: Angle of mouth; upper lip
Action: draws corners of mouth back and up

Question 1

Buccinator*

Answer 1

Origin: Maxillary bone and mandible
Insertion: blends into fibers of orbicularis oris
Action: compresses cheek

Question 2

Masseter

Answer 2

Origin: Zygomatic arch
Insertion: lateral surface of mandible
Action: elevates mandible

Question 3

Temporalis*

Answer 3

Origin: along temporal lines of skull
Insertion: coronoid process
Action: elevates mandible

Question 4

Platysma

Answer 4

Origin: cartilage of second rib to scapula
Insertion: mandible and skin of cheek
Action: tenses skin of neck, depresses mandible

Question 5

Sternocleisomastoid

Answer 5

Origin: superior margins of sternum and clavicle
Insertion: mastoid region of skull
Action: both flex neck, alone bends head toward shoulder and turns face

Question 6

Splenius capitus

Answer 6

Origin: Spinous process of lower cervical and upper thoracic vertebrae
Insertion: mastoid process, skull base, upper cervical vertebrae
Action: both extend neck, alone rotates and flexes head

Question 7

External Intercostals

Answer 7

Origin: inferior border of each rib
Insertion: superior border of next rib
Action: elevate ribs

Question 8

External obliques

Answer 8

Origin: lower eight ribs
Insertion: linea alba and iliac crest
Action: compresses abdomen, depresses ribs, flexes or laterally flexes vertebral column

Question 9

Rectus abdominis

Answer 9

Origin: superior surface of pubis around symphysis
Insertion:binferior surfac of costal cartilages 5-7 and xiphoid process
Action: depresses ribs, flexes vertebral column

Question 10

Trapezius

Answer 10

Origin: occipital bone and thoracic vertebrae
Insertion: clavicle and scapula
Action: elevate, adduct, depress rotate scapula, elevate clavicle, extend or hyperextend the neck

Question 11

Pectoralis minor*

Answer 11

Chest; ribs/ coracoid process

Question 12

Deltoid

Answer 12

Origin: clavicle and scapula
Insertion: deltoid tuberosity of humerus
Action: abduction at shoulder

Question 13

Latissimus dorsi

Answer 13

Origin: lower thoracic and lumbar vertebrae
Insertion: intertubercular groove of humerus
Action: extension, adduct and medial rotation at shoulder

Question 14

Pectoralis major

Answer 14

Origin: cartilages of ribs 2-6, body of sternum, clavicle
Insertion: greater tubercle of humerus
Action: flexion, adduction, and medial rotation at shoulder

Question 15

Supraspinatus*

Answer 15

Origin: supraspinatus fossa of scapula
Insertion: greater tubercle of humerus
Action: lateral rotation at shoulder

Question 16

Subscapularis*

Answer 16

DEEP on pecs basically on scapula

Question 17

Teres major*

Answer 17

Origin: inferior angle of scapula
Insertion: intertubercle of humerus
Action: adduction and medial rotation at shoulder

Question 18

Biceps brachii

Answer 18

Origin: Coracoid process and supraglenoid tubercle (scapula)
Insertion: radial tuberosity
Action: flexion at Shoulder and elbow, supination

Question 19

Triceps brachii

Answer 19

Origin: superior, posterior, and lateral margins of humerus
Insertion: olecranon of ulna, elbow
Action: extension at elbow

Question 20

Supinator

Answer 20

Origin: lateral epicondyle of humerus and ulna
Insertion: anterior and lateral surface of radias distal to the radial tuberosity
Action: supination

Question 21

Flexor digitorum

Answer 21

Origin: medial epicondyle of humerus, anterior surfaces of ulna and radius, medial and posterior surfaces of ulna
Insertion: distal phalanges
Action. Flexion at finger joints and wrist

Question 22

Gracilis

Answer 22

Origin: inferior ramps of pubis
Insertion: medial surface of tibia inferior to medial condyle
Action: flexion at knee, adduction and medial rotation at hip

Question 23

Gluteus Maximus

Answer 23

Origin: iliac crest of ilium, sacrum, and coccyx
Insertion: iliotibial tract and gluteal tuberosity of femur
Action: extension and lateral rotation at hip

Question 24

Biceps femoris

Answer 24

Origin: iscial tuberosity and linda aspera of femur Insertion: head of fibula, lateral condyle of tibia, Action: flexion at knee, extension and lateral rotation at hip

Question 25

Popliteus

Answer 25

Origin: lateral condyle of femur Insertion: posterior surface of proximal tibial shaft Action: rotates tibia, flexion at knee

Question 26

Vastus lateralis

Answer 26

Origin: anterior and inferior to greater trochanter of femur and along linea aspera Insertion: tibial tuberosity by way of patellar ligament Action: extension at knee

Question 27

Sartorius

Answer 27

Origin: anterior superior spine of ilium Insertion: medial surface of tibia near tibial tuberosity Action: flexion at knee, flexion and lateral rotation at hip

Question 28

Tibialis anterior

Answer 28

Origin: Lateral condyle and proximal shaft of tibia Insertion: base of first metatarsal bone Action: dorsiflexion, inversion of foot

Question 29

Gastrocnemius

Answer 29

Origin: femoral condyles Insertion: calcaneus by way of calcaneal tendon Action: plantar flexion at ankle, inversion and adduction of foot, flexion at knee

Question 30

Flexor hallucis longus

Answer 30

Origin: posterior surface of fibula Insertion: inferior surface, distal phalanx of great toe Action: extension at joints of great toe