The extensor carpi radialis muscle, which consists of two parts—longus and brevis—primarily functions to extend and abduct the wrist. It plays a crucial role in stabilizing the wrist during hand movements and contributes to the overall coordination of the forearm and hand. This muscle is particularly active during actions that involve gripping or lifting objects.
extensor carpi radialis
The muscle that acts as a synergist to the flexor carpi radialis during wrist abduction is the extensor carpi radialis longus. Both muscles work together to assist in the movement, with the flexor carpi radialis contributing to wrist flexion and abduction, while the extensor carpi radialis longus helps stabilize and support the wrist during this motion.
Extension of the wrist is done by both the Extensor Carpi Radialis and the Extensor Carpi Ulnaris muscles, while abduction of the wrist is done by both the Extensor Carpi Radialis and Flexor Carpi Radialis.
flexor carpi radialis, flexor carpi ulnaris, extensor carpi radialis longus, extensor carpi ulnaris
Extensor Carpi Radialis Longus
Radial
There's more than one: flexor carpi radialis palmaris longus flexor carpi ulnaris pronator teres flexor digitorum superficialis (sublimis) flexor digitorum profundus flexor pollicis longus pronator quadratus brachioradialis extensor carpi radialis longus extensor carpi radialis brevis extensor digitorum (communis) extensor digiti minimi (proprius) extensor carpi ulnaris abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis (proprius) supinator anconeus
The agonist muscle for wrist flexion is the flexor carpi radialis, while the antagonist muscle is the extensor carpi radialis longus. These muscles work in opposition to produce movement at the wrist joint.
The agonist muscles responsible for wrist extension (or hypertension) include the extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris. These muscles work together to extend the wrist, allowing for movements such as lifting or pushing. They are primarily innervated by the radial nerve. Additionally, the extensor digitorum can assist in wrist extension during finger movements.
The wrist flexor that follows the ulna is the flexor carpi ulnaris muscle. It originates from the medial epicondyle of the humerus and inserts on the pisiform and the hamate bones of the wrist. Its primary function is wrist flexion and ulnar deviation.
They are so many. But main actors are extensor carpi radialis longus and brevis and extensor carpi ulnaris. Others: extensors_digitorum, indicis, digiti minimi, pollicis longus and brevis.
The extensor that is considered a one-joint muscle is the extensor carpi radialis longus. Unlike other extensors that cross multiple joints, the extensor carpi radialis longus primarily acts on the wrist joint, aiding in wrist extension and abduction. This specificity allows it to play a key role in wrist movements without influencing the elbow joint.