Muscle Function

Raises the eyebrows

• frontalis
• orbicularis oculi
• orbicularis oris
• biceps brachi

Aides in chewing

• temporalis
• frontalis
• latissimus dorsi
• triceps brachi

Purses the lips

• orbicularis oculi
• orbicularis oris
• masseter
• sternocleidomastoid

Opens/closes eye

• orbicularis oculi
• orbicularis oris
• trapezius
• masseter

Twists and tilts the neck

• sternocleidomastiod
• trapezius
• masseter
• pectoralis

Rotates and retracts the shoulder blades

• deltoid
• biceps brachii
• trapezius
• latissimus dorsi

Raises the arm to the front, back, and side

• biceps femoris
• deltoid
• trapezius
• triceps brachii

Extends or straightens the arms

• Triceps brachii
• Biceps brachii
• Pectoralis
• Rectus femoris

Flexes the arm

• Biceps brachii
• Biceps femoris
• Triceps brachii
• External oblique

Draws the arms towards the trunk.

• Pectoralis
• Biceps brachii
• Rectus abdominus
• Gluteus maximus