Pronator reflex

The pronator reflex is a reflexive contraction of the pronator muscles, which help rotate the arm inward and keep it in the correct position. This reflex is one of the most important for maintaining correct posture and coordination of movements.

The pronator muscles are located on the front surface of the forearm and shoulder, as well as on the back of the hand. They include the extensor carpi radialis longus and brevis, extensor digitorum longus and brevis, extensor pollicis longus and pronator quadratus.

The pronator reflex is caused by irritation of receptors on the palmar surface of the wrist or fingers. In this case, the pronator muscles contract and the arm rotates inward. This reflex serves to maintain the correct position of the hand when performing various movements, such as drawing, writing, playing musical instruments, etc.

Violation of the pronator reflex can be associated with various diseases and injuries, such as spinal cord injuries, neurological diseases, paralysis, paresis, cerebrovascular accidents, etc. In these cases, the reflex may be weakened or absent completely, which can lead to poor coordination and balance.

The pronator reflex is deep and vivid; it serves to move the palm of the hand onto the forearm. The appearance of the reflex is accompanied by a lowered hand and fingers brought to the midline. The reflex disappears when the limb or nerves lose sensitivity. Damage and inflammation of the roots of the brachial plexus blocks the reflex. As soon as adequate blood circulation is lost due to weakening or damage to the nerve bundle, reflex reactions become insufficient. Excessive muscle tension can be accompanied by excessive effort, which leads to a breakdown of the reflex. Causes of the disorder include compression of peripheral nerves and compression of nerve fibers. The appearance of these symptoms usually means the development and progression of neurological pathology. On examination, pressure on the skin reveals a slow rise of the wrist over several seconds. The presence of abnormal reactions indicates instability of the nervous system and requires attention and thorough examination. By feeling the location of the reflex, you can identify active tension in the finger flexors, as well as the interosseous and abdominal muscles. In addition, wrist rotation, shoulder movement, and elbow extension are assessed. Tissue sensitivity decreases. Pain occurs in muscle groups that are innervated by the nerves of the pinched artery.