Reflex Periosteal

The periosteal reflex (r. periostalis; synonym r. periosteal) is one of the tendon reflexes, which is caused by tapping the bone with a hammer at the site of tendon attachment. In this case, contraction occurs in the muscles innervated by the spinal segment from which branches extend to the adjacent bone and periosteum.

The reflex has diagnostic value, since its absence or weakening may indicate damage to the corresponding segments of the spinal cord. In addition, the periosteal reflex helps determine the level of damage in injuries and diseases of the nervous system.