The illness of Peak belongs to group of frontotemporal dementias at which unlike degeneration Alzheimer's disease first of all not temporoparietal zones of bark of a great brain, and bark of frontal and front departments of temporal shares are exposed. Approximately a half of patients has a positive family anamnesis.
The Peak illness usually develops in the presenile period (45 — 65 years). In a clinical picture changes of behavior whereas memory unlike Alzheimer's disease a long time can remain rather safe dominate. Patients become apathetic, aspontanny, scattered, sometimes stirred up and impulsive. Gradually the criticism decreases, slovenliness, ignoring of social norms appear. The stereotypic movements, persuasive manipulations with surrounding objects, bulimia are noted. Change of behavior is accompanied by speech frustration: the active speech is minimized, answers become terse, appear an echolalia — repetition of the phrase which is just said by someone (for example, the question asked the patient) and speech perseverations (repeated repetition of the same word or phrase). Finally the mutism develops. Emotional and personal disturbances (alarm, a depression, morbid depression, apathy) are often noted. At neurologic survey reflexes of oral automatism, frontal signs (a grasp reflex, a naratoniya), later — an akineziya, rigidity, a tremor and other symptoms come to light. The current which is slowly progressing. Life expectancy — 8 — 10 years from the moment of emergence of the first symptoms. The computer tomography and a magnetic and resonant tomography reveal an atrophy of frontal and perednevisochny departments.
Symptomatic treatment. Leaving is carried out by the general rules.