During this period, the phenomenon can be observed catarrhal upper respiratory tract, sore throat, gastrointestinal distress and abdominal pain, vomiting, and sometimes darkening of consciousness, severe headache, delirium. Early an infringement of autonomic functions: sweating, changes in vascular responses. In half the cases there is pain, often tapped on the move. There is pain along the nerve trunks. lymphocytic pleocytosis.
In the first days of illness in the cerebrospinal fluid also contains polinukleary. The amount of protein is normal or slightly increased, the sugar content is normal. Temperature and general clinical symptoms are kept in characterized by the manifestation of flaccid paralysis occurring at an altitude of temperature, during its fall as the first day after normalization of temperature, which corresponds to 2.5 days of illness. Febrile period, there may be very short. Usually in the proximal limbs, most often – the legs.
Somewhat less affected muscles of the trunk and neck. Involvement of respiratory muscles significantly worsens the prognosis. There are defeats deltoid, triceps, forearms insoles. When polio is usually observed asymmetric flaccid paralysis with the greatest defeat proksimylnyh departments, which are characterized by hypo-and areflexia, hypotonia and atrophy. The degree and extent of paralysis is very variable. Sensitivity is usually not changed. In terms of the dominant lesions of the nervous system distinguishes the following forms: a) Spinal: focal and widespread (Flaccid paralysis of limbs, torso and neck, with a high injury – respiratory distress). This is the most common form, and b) bulbar (swallowing disorders, speech, chewing, breathing and cardiovascular activity), and c) Pontin (can occur with isolated lesions of the facial nerve that causes the greatest diagnostic difficulty), and d) encephalitic – is characterized by predominantly cerebral symptoms (Loss of consciousness, seizures, speech disorders, the vestibular-cerebellar symptoms, extrapyramidal hyperkinesis of origin). Often in the clinic, there are various options for a combination of the above forms.