Bicep

Bicep

The bicep is a large muscle located on the front of the upper arm between the shoulder and the elbow. It is known for its role in the flexion of the elbow and the supination of the forearm. The bicep is composed of two heads: the short head and the long head, which work together to perform its functions.

Anatomy

The bicep muscle is divided into two parts:

• Short head - This part of the bicep originates from the coracoid process of the scapula.
• Long head - This part originates from the supraglenoid tubercle of the scapula.

Both heads converge to form a single muscle belly that attaches to the radial tuberosity of the radius bone in the forearm.

Function

The primary functions of the bicep include:

• Elbow flexion - Bending the elbow joint.
• Forearm supination - Rotating the forearm so the palm faces upwards.

The bicep also assists in shoulder flexion due to its attachment to the scapula.

Innervation

The bicep is innervated by the musculocutaneous nerve, which arises from the brachial plexus.

Blood Supply

The blood supply to the bicep is primarily provided by the brachial artery.

Clinical Significance

Injuries to the bicep can include:

• Bicep tendonitis - Inflammation of the bicep tendon.
• Bicep tear - A rupture of the bicep muscle or tendon, often requiring surgical intervention.

Exercises

Common exercises to strengthen the bicep include:

• Bicep curl
• Hammer curl
• Chin-up

Related Pages

• Muscle
• Upper limb
• Elbow
• Forearm
• Shoulder