Muscles

Question 1

Upper fibers: elevates scapula (shrug shoulders) rotates scapula
Middle fibers: retract scapula
Lower fibers: depress scapula

Answer 1

Trapezius

Question 2

Extension of humerus
Adducts and medially rotates humerus (pull-up)

Answer 2

Latissimus Dorsi

Question 3

Retracts scapula

Answer 3

Rhomboid Minor
Rhomboid Major

Question 4

Elevates scapula

Answer 4

Levator Scapulae

Question 5

Unilaterally: laterally flexes and rotates head to ipsilateral side
Bilaterally: extends head and neck

Answer 5

Splenius Capitis
Splenius Cervicis

Question 6

Unilaterally: laterally flexes vertebral column to ipsilateral side
Bilaterally: extends vertebral column

Answer 6

Iliocostalis
Longissimus
Spinalis

Question 7

Anterior fibers: flexes and internally rotates humerus
Middle fibers: abducts humerus
Posterior fibers: extends and externally rotates humerus

Answer 7

Deltoid

Question 8

Initiates abduction of humerus

Answer 8

Supraspinatus

Question 9

Externally rotates humerus

Answer 9

Infraspinatus
Teres Minor

Question 10

Internally rotates humerus

Answer 10

Subscapularis

Question 11

Adducts and internally rotates humerus

Answer 11

Teres Major

Question 12

Adducts and internally rotates humerus

Answer 12

Pectoralis Major

Question 13

Protracts scapula

Answer 13

Pectoralis Minor

Question 14

Protracts scapula and holds scapula against rib cage

Answer 14

Serratus Anterior

Question 15

Supinates forearm
Flexes elbow joint
Flexes shoulder joint
Innervation: musculocutaneous nerve

Answer 15

Biceps Brachii

Question 16

Flexes and Adducts humerus

Innervation: musculocutaneous nerve

Answer 16

Coracobrachialis

Question 17

Flexes elbow joint

Innervation: musculocutaneous nerve

Answer 17

Brachialis

Question 18

Extends forearm
Extends arm long head only
Innervation: radial nerve

Answer 18

Triceps Brachii

Question 19

Elevates rib below

Answer 19

External intercostal

Question 20

Depresses rib above

Answer 20

Internal intercostal

Question 21

Contraction flattens diaphragm which decreases intrathoracic pressure allowing inspiration

Answer 21

Diaphragm

Question 22

Flexes trunk (sit-up) and compresses abdominal organs

Answer 22

Rectus Abdominus

Question 23

Bilaterally: compresses and supports abdominal organs
Unilaterally: lateral flexion of trunk, rotation of trunk

Answer 23

External Oblique
Internal Oblique

Question 24

Compresses abdominal organs

Answer 24

Transverse Abdominus

Question 25

Hip extension and lateral rotations of femur

Answer 25

Gluteus Maximus

Question 26

Abducts and medially rotates femur, keeps pelvis level when opposite leg is off ground (balancing on 1 leg)

Answer 26

Gluteus Medius
Gluteus Minimus

Question 27

Hip extension
Knee flexion
Medial rotation of leg

Answer 27

Semitendinosus
Semimembranosus
Innervation: tibial part of sciatic nerve

Question 28

Hip extension
Knee flexion
Lateral rotation of leg

Answer 28

Biceps Femoris

Innervation: tibial part of sciatic nerve