Muscle ID

Frontalis

Frontalis

forehead

Soleus

plantar flexes foot

Orbicularis oculi

Closes eyelids; used in blinking, winking, and squinting

Biceps brachii

flexes forearm

Rectus femoris

extends leg and flexes thigh

Gluteus maximus

butt

Infraspinatus

lateral rotation at shoulder

Occipitalis

pulls scalp posteriorly

Masseter

elevates mandible

Extensor digitorum

Extends fingers and the wrist

Calcaneal tendon

Achilles tendon

Coracobrachialis

Flexes and adducts the humerus

Serratus anterior

pulls scapula anteriorly and downward

Adductor magnus

hip adduction

Pectoralis major

Adducts and flexes humerus

Triceps brachii

extends forearm at elbow

Vastus medialis

extends knee

Semimembranosus

Flexes leg at the knee and extends thigh at the hip; belongs to the hamstring group

Teres major

extends, adducts, and medially rotates arm

Gluteus medius

abducts and medially rotates thigh

Buccinator

compresses cheek

Internal oblique

tenses abdominal wall and compresses abdominal contents

Rhomboid major

adducts scapula

Origin

attachment of a muscle that remains relatively fixed during muscular contraction

Latissimus dorsi

Extends, adducts, and medially rotates the arm; draws the shoulder downward and backward

External oblique

Compresses abdomen; laterally flexes and rotates vertebral column

Tibialis anterior

dorsiflexes and inverts foot

Sartorius

Flexes, abducts, and laterally rotates thigh at the hip; flexes knee

Vastus lateralis

extends leg at knee

Semitendinosus

extends thigh and flexes leg

Teres minor

rotates arm laterally

Pectoralis minor

protracts and depresses scapula

Gluteus minimus

abducts and medially rotates thigh

Plantaris

plantar flexion

Rhomboid minor

adducts scapula

Insertion

attachment to movable bone

Gracilis

adducts thigh

Temporalis

elevates and retracts mandible

Deltoid

shoulder

Rectus abdominis

abs

Masseter

elevates mandible

Vastus intermedius

extends leg

Trapezius

Elevates, depresses, retracts, and rotates the scapula; rotates the arm

Zygomaticus

raises corner of mouth to smile

Supraspinatus

Abducts arm; stabilizes the head of the humerus in glenoid cavity; one of the "rotator cuff" muscles

Adductor longus

adducts, flexes, and medially rotates thigh

Fibularis longus

Plantar flexion and eversion of foot

Transversus abdominis

compresses abdomen

Gastrocnemius

Calf muscle

Orbicularis oris

closes lips

Sternocleidomastoid

flexes neck; rotates head

Brachioradialis

flexes forearm

Biceps femoris

flexes leg and extends thigh

Brachialis

flexes forearm

Subscapularis

medially rotates arm at shoulder

Tensor fasciae latae

Abducts, flexes, and rotates the thigh medially

Flexor carpi radialis

flexes and abducts wrist

Iliotibial band

Helps to maintain knee extension, especially while standing

Adenosine triphosphate (ATP)

the sole fuel for muscle contraction