Final answer:
The brachialis is found deep to the biceps brachii in the upper arm and is a key muscle for flexing the forearm, functioning alongside the biceps brachii and brachioradialis in the anterior compartment of the arm.
Step-by-step explanation:
Location and Function of the Brachialis Muscle
The brachialis is a muscle located in the upper arm, specifically deep to the biceps brachii. Its primary function is to provide power for flexing the forearm.
This muscle plays a crucial role as a flexor in the anterior compartment of the arm, also known as the anterior flexor compartment. It operates alongside the biceps brachii and brachioradialis muscles, which are also involved in flexing the forearm.
The biceps brachii is a two-headed muscle that crosses the shoulder and elbow joints, aiding in forearm flexion, supination, and shoulder flexion. The brachioradialis muscle is capable of flexing the forearm swiftly or assisting in lifting loads slowly.