Skeletal Muscle Anatomy Names and Actions

Gastronemius Action

Plantar Flexor of the ankle, and a knee flexor.

Origin

the point where a muscle attaches to a stationary bone.

Insertion

the point where a muscle attaches to movable bone

Gastonemius Location

Back of calf

Tricep Brachii Action

Extends the muscle

Tricep Brachii Location

Back of upper arm

Rectus Abdominus Action

Flexion of the lumbar spine

Rectus Abdominus Location

Abs

Trapezius Action

Elevates, Retracts, and Depresses the Scapula

Trapezius Location

Upper back and neck

Rectus Femoris Location

Front of thigh

Rectus Femoris Action

Hip flexion and knee extension

Sartorius Location

Strip going diagonally on thigh

Sartorius Action

Hip Flexion, Hip abduction, Hip Lateral

Deltoidus Location

Shoulder muscle

Deltoidus Action

Abduction, Flexion, Extension

External Oblique Action

trunk rotation and lateral flexion and compression of the abdominal contents

External Oblique Location

Sides of the abdomen

Frontalis Action

Raises eybrows and wrinkles forehead

Frontalis Location

Forehead

Biceps Brachii Action

the flexion and supination (outward rotation) of the forearm

Biceps Brachii Location

Bicep

Brachioradialis Action

Flexes the forearm at the elbow

Brachioradialis Location

Forearm

Tibialis Anterior Action

foot dorsiflexion; foot inversion

Tibialis Anterior Location

Little bit in middle of calf

Pectoralis Major Action

Adducts and flexes humerus

Pectoralis Major Location

Pecs