Arm Muscles: Types, Functions, and Key Players

The human arm contains several groups of muscles that work together to perform a variety of movements, including flexing, extending, rotating, and abducting the arm. The major muscle groups in the arm include:

Triceps brachii: This muscle is located on the back of the upper arm and is responsible for straightening or extending the elbow joint.

Biceps brachii: This muscle is located on the front of the upper arm and is responsible for flexing or bending the elbow joint.

Brachioradialis: This muscle is located on the forearm and assists the biceps in flexing the elbow joint.

Supinator: This muscle is located on the forearm and is responsible for rotating the forearm so that the palm faces upward.

Pronator teres: This muscle is located on the forearm and is responsible for rotating the forearm so that the palm faces downward.

Flexor carpi radialis: This muscle is located on the forearm and is responsible for flexing the wrist joint.

Extensor carpi radialis: This muscle is located on the forearm and is responsible for extending the wrist joint.

These are just a few of the major muscle groups in the arm. Each of these groups consists of multiple individual muscles that work together to perform specific movements.