The brachialis is a muscle located in the upper arm, specifically on the front of the humerus bone. It plays a crucial role in elbow flexion, meaning it helps bend your arm at the elbow joint.
Anatomy and Function:
- Location: The brachialis sits deep to the biceps brachii muscle, meaning it's found beneath the biceps.
- Origin: It originates from the distal half of the anterior surface of the humerus.
- Insertion: The brachialis attaches to the coronoid process of the ulna, which is a bony projection on the ulna bone.
- Action: Its primary function is to flex the elbow joint, bringing your forearm closer to your upper arm. This action is particularly important for lifting and carrying objects.
Importance:
The brachialis is a powerful muscle that contributes significantly to elbow flexion. It's especially active during powerful gripping and heavy lifting tasks.
Clinical Relevance:
- Injury: Injuries to the brachialis are not very common but can occur due to overuse, trauma, or repetitive strain.
- Strength Training: The brachialis is a key muscle to target for upper body strength training. Exercises like bicep curls and hammer curls effectively engage this muscle.
