Anatomy Exam 3 Questions

What are the 3 Erector Spinae Muscles?

iliocostalis, longissimus, spinalis

What are the two muscles used in inspiration?

diaphragm and external intercostals

Which muscle’s main action is mastication?

masseter

What % of muscles is axial?

60%

Which muscle is the agonist of lumbar flexion?

Rectus Abdominis

Lumbar flexion is the action of what muscles?

obliques and iliocostals

The scapula is moved by 7 muscles. What are they?

trapezius, rhomboids, levator scapulae, pectoralis minor, serratus minor

What two muscles do trunk rotation?

external and internal obliques

This muscle begins at the xiphoid process and ends near the pubic symphysis?

external oblique

What is the deepest muscle of the hamstrings?

semimembranosus

What is the most lateral of the forearm muscles?

pronator teres

What is the agonist of hip extension?

gluteus maximus

What muscle is responsible for dorsiflexion of the foot?

tibialis anterior

List all of the muscles responsible for wrist EXTENSION. Are they located anterior or

posterior?

extensor carpi radialis longus and brevis (posterior)

What muscle is deep to the gastrocnemius, and assists with plantar flexion?

soleus

List all of the muscles responsible for wrist FLEXION. Are they located anterior or

posterior?

flexor carpi radialis, palmaris longus, flexor carpi ulnaris (anterior)

What is the agonist of shoulder flexion?

deltoid

What muscles make up the lateral hip rotators?

piriformis, gemellus superior and inferior, obturator internus and externus, quadratus femoris

Name this lateral hip muscle that tenses the IT band to stabilize the knee at full extension.

tensor fasciae latae

What muscle originates at the coracoid process, inserts on the medial margin of the shaft of the humerus, and its action is to adduct and flex the shoulder.

coracobrachialis

What are the four rotator cuff muscles?

supraspinatus, infraspinatus, subscapularis, teres minor