Extensor muscle

Extensor muscles are a group of muscles that help in the movement of certain joints. These muscles are located in various parts of the body, including the arms, legs, and back. They are responsible for extending, or straightening, the joints they are connected to.

Function

The primary function of the extensor muscles is to extend or straighten out the joints. This action is in contrast to the function of flexor muscles, which are responsible for bending the joints. Extensor muscles are crucial for various movements and activities, such as standing up, lifting objects, and reaching out for things.

Types of Extensor Muscles

There are several types of extensor muscles in the human body, including:

• Extensor carpi radialis longus: This muscle is located in the forearm and helps in extending and abducting the wrist.
• Extensor carpi radialis brevis: This muscle is also located in the forearm and assists in extending and abducting the wrist.
• Extensor digitorum: This muscle is responsible for extending the fingers and the wrist.
• Extensor carpi ulnaris: This muscle helps in extending and adducting the wrist.
• Extensor pollicis longus and brevis: These muscles are responsible for extending the thumb.
• Extensor indicis: This muscle helps in extending the index finger.

Disorders and Injuries

Extensor muscles, like other muscles in the body, can be affected by various disorders and injuries. These can include strains, sprains, and conditions like tennis elbow, which is caused by overuse of the extensor carpi radialis brevis muscle.

Treatment

Treatment for disorders and injuries of the extensor muscles depends on the severity of the condition. Mild conditions can often be treated with rest, ice, compression, and elevation (RICE). In more severe cases, physical therapy, medication, or even surgery may be required.

See Also

• Flexor muscle
• Muscular system
• Muscle contraction

Extensor muscle Resources
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