muscle function

• the Frontalis Raises eyebrows and wrinkles forehead
• the Orbicularis oculi Closes eye
• Orbicularis oris Closes lips; kissing and whistling
• Sternocleidomastoid Flexes, tilts, and rotates head
• Zygomaticus Raises corners of mouth; smiling
• Masseter Elevates (closes) and protracts jaw, as when chewing
• Trapezius Shrug shoulders
• Latissimus dorsi Extends, adducts, and medially rotates arm
• pectoralis major Flexes, adducts, and medially rotates arm
• External oblique Lateral rotation of the vertebral column; twisting
• Rectus abdominis Flexion of the vertebral column; sit ups
• Deltoid Abducts, flexes, and rotates arm
• Triceps brachii Extends forearm
• Biceps brachii Flexes forearm
• Brachioradialis Flexes arm
• Extensor digitorum Extends fingers and hand
• Extensor carpi radialis longus Extends hand
• Flexor carpi ulnaris Flexes hand
• Palmaris longus Flexes hand
• Tensor fasciae latae Flexes, abducts, and rotates thig
• Adductor longus Adducts, flexes, and rotates thigh
• Gluteus maximus Extends, abducts, and rotates thigh
• Gracilis Adducts thigh and flexes leg
• Sartorius Crosses the leg
• Vastus medialis Extends leg
• Vastus lateralis Extends leg
• Biceps femoris Extends thigh and flexes le
• Rectus femoris Flexes thigh and extends leg
• tibialis anterior Dorsiflexion of the foot; inverts foot
• Fibularis longus Plantar flexion of the foot; everts foot
• Gastrocnemius Plantar flexion of the foot; flexes leg