Advertisement

Topics

Olfactory hallucinations in schizophrenia and schizoaffective disorder: A phenomenological survey.

Summary of "Olfactory hallucinations in schizophrenia and schizoaffective disorder: A phenomenological survey."

Olfactory hallucinations (OHs), so it has been argued, are prognostic of a poorer outcome, are unpleasant, and cannot be well explained within current theoretical accounts of hallucinations. We examined these and related issues by conducting structured interviews with 51 participants who experienced OHs and who were previously diagnosed with schizophrenia or schizoaffective disorder. We found no relationship between disease severity measures and type or frequency of OHs. As with prior research, we too noted the predominance of negative OHs, but with many reports of positive OHs, and also found significant relationships between frequency of OHs and severity of tactile hallucinations. We then examined whether odor imagery or involuntary memory might account for the presence of OHs, but these possibilities were not well supported. We then explored, using cluster analysis, whether or not our sample was homogenous. Two clusters were of especial interest; one which may reflect a 'sensory dysfunction group' and one characterized by more severe tactile hallucinations. The presence of tactile hallucinations may suggest a further novel cause of OHs, which we discuss. Our data suggest diverse causes for OHs in schizophrenia, none of which are consistent with current models of hallucinations in other modalities.

Affiliation

Department of Psychology, Macquarie University, Sydney, NSW2109, Australia.

Journal Details

This article was published in the following journal.

Name: Psychiatry research
ISSN: 0165-1781
Pages: 321-7

Links

DeepDyve research library

PubMed Articles [8510 Associated PubMed Articles listed on BioPortfolio]

Occurrence and co-occurrence of hallucinations by modality in schizophrenia-spectrum disorders.

It is not only unclear why hallucinations in schizophrenia occur with different prevalence by modality, but also to what extent they do. Reliable prevalence estimates of hallucinations by modality in ...

Evaluating clinicians' representations of schizoaffective disorder.

Schizoaffective disorder (SAD) has routinely exhibited poor diagnostic accuracy and reliability. In addition to phenomenological problems with the definition of SAD, the way in which clinicians repres...

Disrupted Olfactory Integration in Schizophrenia: Functional Connectivity Study.

Evidence for olfactory dysfunction in schizophrenia has been firmly established. However, in the typical understanding of schizophrenia, olfaction is not recognized to contribute to or interact with t...

Working memory predicts presence of auditory verbal hallucinations in schizophrenia and bipolar disorder with psychosis.

The recent dramatic increase in research investigating auditory verbal hallucinations (AVHs) has broadened the former narrow focus on schizophrenia to incorporate additional populations that experienc...

Increased risk of suicide in schizophrenia patients with linkage to chromosome 13q.

We link schizophrenia in families from the genetically isolated South African Afrikaner population to chromosome 13q (n =51), 1p (n =23) and combined 13q & 1p (n =18). Patients with linkages to chromo...

Clinical Trials [4742 Associated Clinical Trials listed on BioPortfolio]

A Study of the Effects of Ziprasidone for the Treatment of Schizophrenia or Schizoaffective Disorder in Patients Who Were Switched From Other Antipsychotic Drugs

The purpose of this study is to see if differences exist in outcome in patients with schizophrenia or schizoaffective disorder who were switched from other antipsychotics to ziprasidone.

Evaluation of the Efficacy and Safety of Risperidone Injections Given Once a Month to Adults With Schizophrenia or Schizoaffective Disorder

The purpose of this study is to assess the effectiveness and safety of long-acting risperidone given as a once monthly injection to adult patients with schizophrenia or schizoaffective dis...

Study Evaluating the Effects of Multiple Doses of NSA-789 in Subjects With Schizophrenia or Schizoaffective Disorder

This study will evaluate the safety of multiple doses of NSA-789 in subjects with schizophrenia or schizoaffective disorder. This study will also assess how NSA-789 is absorbed and elimin...

Effect of Ziprasidone on Glucose & Plasma Lipids in Diabetes (II) and Schizophrenia or Schizoaffective Disorder

The aim of the protocol is to study the effects of 320 mg/day of ziprasidone (Geodon) on glucose and lipid metabolism of patients with both Diabetes Type II (DM) and schizophrenia or schiz...

A Drug Interaction Study of Valproic Acid and Paliperidone Extended-Release (ER) in Patients With Schizophrenia, Bipolar I Disorder, or Schizoaffective Disorder

The purpose of this study is to evaluate the potential effect of multiple oral doses of an extended release formulation of paliperidone on the pharmacokinetics (blood levels) of valproic a...

Medical and Biotech [MESH] Definitions

Marked disorders of thought (delusions, hallucinations, or other thought disorder accompanied by disordered affect or behavior), and deterioration from a previous level of functioning. Individuals have one o more of the following symptoms: delusions, hallucinations, and disorganized speech. (from DSM-5)

A severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, HALLUCINATIONS, emotional disharmony, and regressive behavior.

A phenyl-piperidinyl-butyrophenone that is used primarily to treat SCHIZOPHRENIA and other PSYCHOSES. It is also used in schizoaffective disorder, DELUSIONAL DISORDERS, ballism, and TOURETTE SYNDROME (a drug of choice) and occasionally as adjunctive therapy in MENTAL RETARDATION and the chorea of HUNTINGTON DISEASE. It is a potent antiemetic and is used in the treatment of intractable HICCUPS. (From AMA Drug Evaluations Annual, 1994, p279)

Marked disorders of thought (delusions, hallucinations, or other thought disorder accompanied by disordered affect or behavior), and deterioration from a previous level of functioning.

Set of nerve fibers conducting impulses from olfactory receptors to the cerebral cortex. It includes the OLFACTORY NERVE; OLFACTORY BULB; olfactory tract, olfactory tubercle, anterior perforated substance, and olfactory cortex. The term rhinencephalon is restricted to structures in the CNS receiving fibers from the olfactory bulb.

Quick Search
Advertisement
 


DeepDyve research library

Relevant Topics

Psychiatry
Psychiatry is the study of mental disorders and their diagnosis, management and prevention.  Conditions include schizophrenia, severe depression and panic disorders among others. There are pharmaceutical treatments as well as other therapies to help...

Schizophrenia
Schizophrenia is a common  serious long-term mental health condition that affects 5 in 1000 in the UK. It causes a range of different psychological symptoms; hallucinations, delusions, muddled thoughts based on the hallucinations or delusions and ch...