Occurrence of this type of paresis is altogether uncommon (Lishman 1998). Diagnosis
Classification
ICD
The WHO first listed the condition in the 6th revision of the International Classification of Diseases ICD-6 (1949) and it stayed in the manual until the present version ICD-10. ICD-9
The ICD-9 simple-type schizophrenia description:

A psychosis in which there is insidious development of oddities of conduct, inability to meet the demands of society, and decline in total performance. Delusions and hallucinations are not in evidence and the condition is less obviously psychotic than are the hebephrenic, catatonic and paranoid types of schizophrenia. With increasing social impoverishment vagrancy may ensue and the patient becomes self-absorbed, idle and aimless. Because the schizophrenic symptoms are not clear-cut, diagnosis of this form should be made sparingly, if at all. ICD-10
These are the current criteria:

Slowly progressive development over a period of at least one year, of all three of the following: 
(a) A significant and consistent change in the overall quality of some aspects of personal behaviour, manifest as loss of drive and interests, aimlessness, idleness, a self-absorbed attitude and social withdrawal. (b) Gradual appearance and deepening of negative symptoms such as marked apathy, paucity of speech, underactivity, blunting of affect, passivity and lack of initiative, and poor non-verbal communication. (c) Marked decline in social, scholastic or occupational performance. 2. Absence, at any time, of any symptoms referred to in G1 in F20.0 - F20.3 and of hallucinations or well formed delusions of any kind, i.e.
Most commonly acute cerebellar ataxia affects children between age 2 and 7 years. See also
Gluten ataxia

References


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