The diameter of the pupil varies depending on the contraction of special muscles, which operate in a variety of ways: the function of the circular (circular) muscle is aimed at narrowing the pupil, and the function of the radial muscle is to expand it.
Unconsciously produced and inexpedient from the point of view of physiology active movements - hyperkinesis - refer to pathologies of nervous regulation of muscles of different localization and arise as a result of the defeat of the central and somatic nervous system.
Friedreich's ataxia is an autosomal recessive pathology when a sick child is born to a visually healthy couple, but one of the parents owns the disease gene.
Cataplexy is the sudden disappearance of muscle tone caused by emotional stress or a state of affect, from a subtle weakening of the musculature of the face and neck to a total short-term atony and disabling the ability to hold the body in a certain position.
Children's cerebral palsy is one of the most severe neurological diseases in which the brain is affected or not fully developed, and various impairments of motor activity occur.
Neuralgia of the facial nerve, also known as neuritis or Fottergil syndrome, is a pathological condition in which human mimicry is disrupted, paralysis or weakening of the facial musculature is observed.
The disease, which is called Duchenne's dystrophy, is associated with damage to the gene structures responsible for the production of large muscle protein dystrophin.
