Disorders Of Thought Possession

Disorders of thought possession in schizophrenia are sometimes called thought alienation. The patient has the experience that his thoughts are under the control of an outside agency or that others are participating in his thinking. Thought insertion The patient believes that thoughts that are not his own are being put into his mind by an external agency. Thought withdrawal The patient believes that thoughts are being removed from his mind by an external agency. Thought broadcasting The patient...

Factors Affecting Prognosis

Certain clinical features are associated with a poor prognosis early or insidious onset, male sex, negative symptoms19,20 (Figure 1.8), lack of a prominent affective component or clear precipitants, family history of schizophrenia, poor premorbid personality, low IQ, low social class, social isolation, and significant past psychiatric history. Several studies have demonstrated an association between longer duration of untreated illness and poorer outcome. For example, Loebel and colleagues21...

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Lateral Ventricles Schizophrenia

Figure 3.2 Mean ventricle brain ratio (VBR) in controls and patients with schizophrenia from a total of 39 separate studies. The diagonal line indicates the line of equality. Thus, this figure demonstrates that no matter which diagnostic system or method of measuring brain volume is used, patients with schizophrenia do have larger ventricles than controls. Figure reproduced with permission from Van Horn JD, McManus IC. Ventricular enlargement in schizophrenia. A meta-analysis of studies of the...

Cannabis Consumption At Age 18 And Later Risk Of Schizophrenia

Patients as a group may be of lower birth weight than the general population. The morphological abnormalities that have been reported in schizophrenia are consistent with a neurodevelopmental event occurring in fetal or early development. Some believe that the onset of frank psychotic symptoms reflects the delayed sequelae of an earlier developmental aberration, which is then expressed as the brain continues to develop in adolescence and adult life - sometimes termed the 'doomed from the womb'...

Concordance Rates For Schizophrenia From Twin Studies

Figure 2.6 Concordance rates for schizophrenia in studies of dizygotic twins. The implication of the lack of 100 concordance in monozygotic twins is that there must be environmental etiological factors involved in the genesis of schizophrenia. Data from references 4-10 Figure 2.6 Concordance rates for schizophrenia in studies of dizygotic twins. The implication of the lack of 100 concordance in monozygotic twins is that there must be environmental etiological factors involved in the genesis of...

Pet Schizophrenia D2 Occupancy

High D2 receptor availability no occupancy Clozapine treated patient with schizophrenia Medium D2 receptor availability medium ( 60 ) occupancy Typical antipsychotic-treated patient with schizophrenia Low D2 receptor availability high (80 +) occupancy Figure 4.2 Three single photon emission tomography (SPET), scans of striatal D2 and D2-like receptor availability at the level of the basal ganglia. In the scan on the left from a healthy volunteer there is no receptor occupancy and therefore 100...

The Acute Illness

Drawings Schizophrenic Patients

The onset may be rapid, or slow and insidious. In the latter situation in particular, there may be a prolonged period of undiagnosed illness in which the affected person slowly becomes more withdrawn and introverted. They may develop unusual interests, particularly of a religious or philosophical kind, and drift away from family and friends. They may also begin to fail in their occupation or schoolwork. This process can take weeks to years but eventually, often with a seemingly precipitating...

Sideeffects Of Typical Antipsychotics

Acute neurological side-effects secondary to dopamine D2 receptor blockade with typical antipsychotics include acute dystonia. This is characterized by fixed muscle postures with spasm, e.g. clenched jaw muscles, protruding tongue, opisthotonos, torticollis, oculogyric crisis mouth open, head back, eyes staring upwards . It appears within hours to days and young males are most at risk. It should be treated immediately with anticholinergic drugs procyclidine 5-10 mg or benztropine 50-100mg...

Inner Speech And Auditory Hallucinations

Schizophrenia Inner Speech 2011

Figure 3.13 This study investigated the hypothesis that a predisposition to verbal hallucinations is associated with a failure to activate areas concerned with the monitoring of inner speech. Subjects, who included patients with schizophrenia both with and without a significant history of hallucinations, as well as normal controls, were asked to imagine sentences being spoken in another person's voice. The figure illustrates positron emission tomography data superimposed on a normal magnetic...