Extensor Carpi Radialis Brevis
Extensor Carpi Radialis Brevis Definition
The Extensor carpi radialis brevis is the short muscle located on the radial side of the forearm that helps in straightening the wrist. As its name indicates, the muscle helps stretch out the wrist. It belongs to the posterior compartment of the lateral group of the Antebrachial muscle. It is a part of the wrists’ extensor group.
It is also known as Musculus extensor carpi radialis brevis in Latin and as Muscle court extenseur radial du carpe in French.
Extensor Carpi Radialis Brevis Location
The extensor carpi radialis brevis muscle is located on the forearm’s radial side. It runs to the 3rd metacarpal bone above the middle finger from the lateral epicondyle. The extensor carpi radialis longus muscle cover it at the lateral epicondyle.
Extensor Carpi Radialis Brevis Origin
It originates from the lateral epicondyle of humerus through the radial collateral ligament and the common extensor tendon.
Extensor Carpi Radialis Brevis Insertion
The muscle has its insertion at the base of the 3rd metacarpal bone, precisely at its posterior surface.
Extensor Carpi Radialis Brevis Function
This muscle helps extend the wrist as well as abduct the wrist or perform its radial deviation. It can prevent the flexion of wrist while making a fist or a strong grip. It can stabilize the wrist.
Extensor Carpi Radialis Brevis Innervation
It is supplied by the radial nerves C7 and C8. The muscle, from proximal to distal, gets blood supply from the following arteries:
Extensor Carpi Radialis Brevis Pain
The muscle can result in painful sensations at the back area of the wrist, also known as the dorsum of the hand. Pain is mostly sensed from the muscle in case it is very tight or afflicted with trigger points.
The muscle is directly attached to the wrist and can cause pain in the forearm, back and hand, in case it is very tight. The same aching sensation can be felt in case trigger points exist in this muscle.
In case your extensor carpi radialis brevis is too tensed or there is excessive strain in the trigger points, you can suffer from a significantly weakened grip other than feeling pain at the back part of the hand. You might suffer so much weakness as to drop even the lightest things, such as a newspaper.
Due to repeated use of a strong grip, the muscle can frequently get strained and develop trigger points. This can due to one or more of the activities mentioned here:
In rare cases, extensor carpi radialis brevis pain might also result from isolated extensor carpi radialis brevis tendon rupture in the third metacarpal bone.
Treatment for such pain and discomfort includes rest and self-massage of the injured area.
Extensor Carpi Radialis Brevis Pictures
Look at the following Extensor Carpi Radialis Brevis images and diagrams and get a proper idea about the location of this muscle as well as its shape and structure.
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