Anatomy Muscle Practical

For Mr Peterson

Frontalis

Raises Eyebrow

Orbicularis Oculi

Closes eye

Buccinator

Compresses cheeks

Orbicularis Oris

Compresses lips

Platysma

Tenses skin of neck; depresses mandible

Temporalis

Tenses scalp; moves auricle of ear

Masseter

Tenses side of the jaw

Sternocleidomastoid

Tenses the neck

Deltoid

Abduction at shoulder (Whole muscle)

Pectoralis Major

Flexion, Adduction and medial rotation at shoulder

Rectus Abdominis

Depresses ribs, flexes vertebral column, compresses abdomen

Transversus abdominis

Compresses abdomen

Internal oblique

Compresses abdomen, depresses ribs and flexes/ bends abdomen

External oblique

Compresses abdomen, depresses ribs and flexes/ bends abdomen

Rectus Sheath (aponeurosis)

no action (aka ziggy fr)

Trapezius

Elevate/ retract/ depress/ rotate scapula, elevate clavicle, extends neck

Latissimus dorsi

extension, adduction and medial rotation at shoulder

Erector spinae

extends neck/vertebral column

Splenius capitus

extends neck, rotates and laterally flexes neck to side

Supraspinatus

abduction at shoulder

Infraspinatus

lateral rotation at shoulder