Arm Muscles

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The biceps brachii is a muscle located in the upper arm. It is responsible for flexion of the elbow and supination of the forearm. It has two heads: the long head and the short head, which originate from the scapula and insert into the radius.

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The triceps brachii is a muscle located in the upper arm. It is responsible for extension of the forearm at the elbow joint and plays a key role in arm movement.

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The brachialis is a muscle in the upper arm that lies underneath the biceps brachii. It is primarily responsible for flexing the elbow joint.

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The brachioradialis is a muscle of the forearm that flexes the forearm at the elbow. It is located on the lateral side of the forearm and is most prominent when the forearm is in a mid-pronated position.

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The pronator teres is a muscle located in the forearm. It is responsible for pronation, which is the movement that turns the palm downward or backward.

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The Flexor carpi radialis is a muscle of the forearm that acts to flex and abduct the hand at the wrist.

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The Palmaris longus is a muscle located in the forearm. It is a slender, superficial muscle that is absent in about 14% of the population. It plays a role in flexing the wrist and tensing the palmar aponeurosis.

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The Flexor carpi ulnaris is a muscle located in the forearm. It is responsible for flexing and adducting the wrist.

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A muscle located in the forearm that plays a key role in extending and abducting the wrist.

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The extensor digitorum is a muscle located in the forearm. It plays a key role in extending the fingers and wrist, allowing for movements such as opening the hand or straightening the fingers.