Muscle actions

Question 1

Triceps brachia

Answer 1

extends the ante brachium, stabilizes the shoulder joint, and extends humerus

Question 2

Plamaris Longus

Answer 2

Flexes the carpus and tenses the palmar fascia

Question 3

Brachioradialis

Answer 3

Flexes the olecranon/ cubit, assists in pronation and supinantion of the antebrachium.

Question 4

Coracobrachialis

Answer 4

Flexes and adducts the humerus

Question 5

Flexor carpi ulnaris

Answer 5

Flexes and adducts the wrist

Question 6

Pronator teres

Answer 6

Pronates the antebrachium, and assists in flexing the elbow joint

Question 7

Supraspinatus

Answer 7

Abducts the brachium and acts to stabilize the humeral head

Question 8

Biceps brachii

Answer 8

Flexes and supinates the antebrachium, flexes the humerus

Question 9

Extensor carpi ulnaris

Answer 9

Extends the carpus and assist in adduction of hand

Question 10

Supinator

Answer 10

Supinates the forearm

Question 11

Infraspinatus

Answer 11

laterally rotates the shoulder and acts to stabilize the humeral head, and abducts the humerus.

Question 12

Pronator quadratus

Answer 12

Pronates the antebrachium

Question 13

Extensor carpi radialis

Answer 13

Extends the carpus and abducts the manus

Question 14

Tensor fasciae later

Answer 14

assists in abduction, medial rotation, and flexion of femur

Question 14

Subscapularis

Answer 14

Medially rotates the brachium and stabilizes the head of the humerus

Question 15

Gastrocnemius

Answer 15

Plantar flexes the tarsal joint and assists in flexion of the patellar/knee joint

Question 16

Sartorius

Answer 16

flexes, laterally rotates, and abducts the hip joint

Question 16

Flexor digitorum

Answer 16

flexes distal phalanges of lateral four metatarsals

Question 17

Gluteus Maximus

Answer 17

Extends and laterally rotates femur, extends, laterally rotates thigh, assists in adduction of the hip joint, assists in raising trunk from flexion

Question 18

Extensor digitorum

Answer 18

extends the digits and the carpus

Question 19

Extensor digitorum pt.2

Answer 19

extends the phalanges of the seconds through the fifth phalanges, assists in dorsiflexion

Question 19

Soleus

Answer 19

Plantar flexes the tarsal joint and stabilizes the leg over the foot

Question 19

Flexor digitorum

Answer 19

Flexes the carpus and digits/phalages 2-5

Question 20

Flexor carpi radialis

Answer 20

Flexes carpus and abducts manus

Question 20

Teres major

Answer 20

medially rotates, adducts, and extends the humerus

Question 21

Deltoid

Answer 21

flexes and medially rotates the brachium, abducts the brachium, and laterally rotates the brachium

Question 22

Adductor longus

Answer 22

adducts and flexes femur

Question 22

Gastrocnemius

Answer 22

plantar flexes the tarsal joint and assist in flexion of the patellar/knee joint

Question 23

Rectus femurs

Answer 23

part of the quadriceps, extends the leg at the knee and flexes the femur at the coxal join

Question 24

Psoas major

Answer 24

flexes the femur at the coxal joint and flexes vertebral column

Question 25

Adductor Magnus

Answer 25

adducts and extends femur, assists

Question 25

Vastus lateralis

Answer 25

part of the quadriceps, extends the leg at the knee and flexes the femur at the coxal joint

Question 26

Vastus medialis

Answer 26

part of the quadriceps, extends the leg at the knee and flexes the femur at the coxal joint

Question 27

Vastus intermedialis

Answer 27

part of the quadriceps, extends the leg at the knee and flexes the femur at the coxal joint

Question 27

External intercostals

Answer 27

elevates the ribs/rib cage

Question 28

Pectoralis minor

Answer 28

draws scapula forward and inferior, draws rib cage superiorly

Question 29

Latissimus dorsi

Answer 29

extends, adducts, and medially rotates the arm, draws shoulder inferiorly and posteriorly

Question 30

Internal intercostals

Answer 30

depresses the ribs/rib cage

Question 31

Rectus abdominis

Answer 31

flexes the vertebral column, compresses abdominal cavity

Question 32

Trapezius

Answer 32

stabilizes, raises, retracts, and rotates the scapula

Question 33

Levator scapulae

Answer 33

elevates the scapula and draws it medially, bends neck laterally

Question 33

External oblique

Answer 33

laterally flexes and rotates vertebral column, both sides flex vertebral column anteriorly,
compresses abdominal cavity

Question 33

Pectoralis major

Answer 33

protracts scapula, adducts and medially rotates arm, flexes humerus

Question 34

Diaphragm

Answer 34

flattens on contraction, increasing the volume of the thorax

Question 35

Scalenes

Answer 35

flexes the neck anteriorly and laterally

Question 36

Sternocleiodomastoid

Answer 36

bends cervical region/neck laterally and rotates head to the opposite side

Question 37

Transversus abdomens

Answer 37

constricts the abdomen and supports the abdominal viscera