The biceps (or biceps brachii) is a large muscle located on the front part of the upper arm between the shoulder and the elbow. It is one of the most well-known muscles in the human body due to its prominent role in arm movements and its visibility when flexed.
Structure of the Biceps
The biceps muscle has two heads:
- Long head: Originates from the supraglenoid tubercle of the scapula (shoulder blade).
- Short head: Originates from the coracoid process of the scapula.
Both heads merge into a single muscle belly, which then attaches to the radius bone in the forearm via a tendon.
Functions of the Biceps
The biceps brachii performs several important functions, including:
- Elbow Flexion: Bending the elbow, such as when lifting objects or performing a bicep curl.
- Forearm Supination: Rotating the forearm so that the palm faces upwards.
- Shoulder Flexion: Assisting in raising the arm forward at the shoulder joint.
Common Exercises for Biceps
To strengthen and develop the biceps, people often perform exercises like:
- Bicep Curls (with dumbbells, barbells, or resistance bands)
- Chin-ups
- Hammer Curls
- Concentration Curls
Related Muscles
The biceps works closely with other muscles in the arm, such as:
- Brachialis: Located underneath the biceps, it assists in elbow flexion.
- Brachioradialis: A forearm muscle that also helps with elbow flexion.
- Triceps: Located on the back of the upper arm, responsible for extending (straightening) the elbow.
In summary, the biceps is a key muscle involved in arm movement and plays an important role in many daily activities and exercises.
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