Family history of psychosis moderates early auditory cortical response abnormalities in non-psychotic bipolar disorder
Autor: | John R Shapiro, Carol A. Tamminga, Godfrey D. Pearlson, Gunvant K. Thaker, Lauren E. Ethridge, Brett A. Clementz, Matcheri S. Keshavan, Jordan P. Hamm, John A. Sweeney |
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Rok vydání: | 2013 |
Předmět: |
Adult
Male Psychosis Bipolar I disorder Bipolar Disorder Electroencephalography Article P3a P3b medicine Humans Family Bipolar disorder Family history Biological Psychiatry Auditory Cortex Principal Component Analysis medicine.diagnostic_test Discriminant Analysis respiratory system medicine.disease Event-Related Potentials P300 Antidepressive Agents Psychiatry and Mental health Acoustic Stimulation Psychotic Disorders Schizophrenia Case-Control Studies Female Psychology Clinical psychology |
Zdroj: | Bipolar disorders. 15(7) |
ISSN: | 1399-5618 |
Popis: | Objectives Bipolar I disorder is a disabling illness affecting 1% of people worldwide. Family and twin studies suggest that psychotic bipolar disorder (BDP) represents a homogeneous subgroup with an etiology distinct from non-psychotic bipolar disorder (BDNP) and partially shared with schizophrenia. Studies of auditory electrophysiology [e.g., paired-stimulus and oddball measured with electroencephalography (EEG)] consistently report deviations in psychotic groups (schizophrenia, BDP), yet such studies comparing BDP and BDNP are sparse and, in some cases, conflicting. Auditory EEG responses are significantly reduced in unaffected relatives of psychosis patients, suggesting that they may relate to both psychosis liability and expression. Methods While 64-sensor EEGs were recorded, age- and gender-matched samples of 70 BDP, 35 BDNP {20 with a family history of psychosis [BDNP(+)]}, and 70 psychiatrically healthy subjects were presented with typical auditory paired-stimuli and auditory oddball paradigms. Results Oddball P3b reductions were present and indistinguishable across all patient groups. P2s to paired stimuli were abnormal only in BDP and BDNP(+). Conversely, N1 reductions to stimuli in both paradigms and P3a reductions were present in both BDP and BDNP(−) groups but were absent in BDNP(+). Conclusions Although nearly all auditory neural response components studied were abnormal in BDP, BDNP abnormalities at early- and mid-latencies were moderated by family psychosis history. The relationship between psychosis expression, heritable psychosis risk, and neurophysiology within bipolar disorder, therefore, may be complex. Consideration of such clinical disease heterogeneity may be important for future investigations of the pathophysiology of major psychiatric disturbance. |
Databáze: | OpenAIRE |
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