OIA LAB QUIZ

head to thigh muscles

Head and Neck Muscles Lab

Frontal Belly of the Occipitofrontalis

A: Raises eyebrows, wrinkles forehead

Orbicularis oculi

A: Closes eyes, blinking, squinting

Zygomaticus

A: Raises corners of mouth in smiling

Orbicularis oris

A: Closes and purse lips

Risorius

A: Draws corner of lip laterally

Depressor anguli oris

A: Depresses laterally corners of mouth, frown

Buccinator

A: Compresses cheeks

Mentalis

A: Protrudes lower lip

Levator labii superioris

A: Elevates upper lip

Depressor labii inferioris

A: Depresses lower lip

Sternocleidomastoid

O: Sternum and Clavicle

I: Mastoid process

A: Flex the head or neck

Digastric

A: Depresses the mandible

Temporalis

O: Temporalis fossa

I: Coronoid process of the scapula

A: Elevates mandible

Splenius

O: C7 to C6

I: Mastoid process

A: Extend the head or neck

Scalene

O: Cervical vertebrae

I: Ribs 1 and 2

A: Flex the head or neck

Masseter Masseter

O: Zygomatic arch

I: Mandibular ramus and angle

A: Elevates mandible

Platysma

A: Tenses skin of neck

Medial pterygoid

O: Medial surface of pterygoid processes

I: Medial angle of the mandible

A: Elevate the mandible

Lateral pterygoid

O: Lateral surface of the pterygoid process

I: Condylar process of the mandible

A: Protracts mandible

Arm & Torso Muscles Lab

Biceps brachii

O: Supraglenoid tubercule/coracoid process

I: Radial tuberosity

Triceps brachii

O: Infraglenoid tubercule

I: Olecranon process

Coracobrachialis

O: Coracoid process

I: Medial mid-humerus

Brachialis

O: Anterior distal humerus

I: Coronoid process of the ulna

Brachioradialis

O: Lateral distal humerus

I: Styloid process of the radius

Anconeus

O: Lateral epicondyle of humerus

Extensor carpi radialis longus

O: Lateral epicondyle of the humerus

I: Metacarpal 2

Flexor carpi radialis

O: Medial epicondyle of the humerus

I: Metacarpal 2

Extensor carpi ulnaris

O: Lateral epicondyle of the humerus

I: Metacarpal 5

Flexor carpi ulnaris

O: Medial epicondyle of the humerus

I: Metacarpal 5

Flexor digitorum

O: Medial epicondyle of humerus

I: Distal phalanges 2-5

Extensor digitorum

O: Lateral epicondyle of the humerus

I: Distal phalanges 2-5

Pronator teres

O: Medial epicondyle of the humerus

I: Midshaft of radius

Palmaris longus

O: Medial epicondyle of the humerus

I: Palmar aponeurosis

Extensor pollicus longus

O: Middle third of the ulna

I: Distal phalanx 1

anterior torso muscle

external intercostals

A: elevates rib cage

internal intercostals

A: depresses rib cage

rectus abdominis

A: flexes and rotates vertebral column

internal obliques

A: flexes and rotates vertebral column

external obliques

A: flexes and rotates vertebral column

pectoralis minor

A: protracts scapula

serratus anterior

A: protracts scapula

pectoralis major

A: flexes arm (humerus)

deltoid

A: abduction of arm (humerus)

diaphragm

A: Flattens on contraction

transverse abdominis

A: Compresses abdomen

subscapularis

A: Protracts the humerus/Extends scapula

posterior torso muscle

trapezius

A: extends head, retracts scapula, elevates clavicle

latissimus dorsi

A: extends arm (humerus), adducts arm (humerus)

infraspinatus

A: lateral rotation of arm (humerus)

teres major

A: medial rotation of arm (humerus), extends arm (humerus)

teres minor

A: lateral rotation of arm (humerus)

supraspinatus

A: abduction of arm (humerus)

rhomboids

A: retracts scapula

erector spinae

A: extend vertebral column

levator scapulae

A: elevate scapula