Opposing Effects of Cannabis Use on Late Auditory Repetition Suppression in Schizophrenia Patients and Healthy Control Subjects
Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, ISSN: 2451-9022, Vol: 2, Issue: 3, Page: 263-271
2017
- 5Citations
- 49Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations5
- Citation Indexes5
- CrossRef4
- Captures49
- Readers49
- 49
Article Description
Chronic cannabis use may cause neurocognitive deficits and increase the risk of psychosis. Nevertheless, the effects of cannabis use on neurocognitive functioning in schizophrenia have remained largely unspecified. Here, we studied repetition suppression of auditory event-related responses in a paired-stimulus design in a mixed sample of schizophrenia patients ( n = 34) and healthy control subjects ( n = 45) with chronic heavy cannabis use and schizophrenia patients ( n = 33) and healthy control subjects ( n = 61) without cannabis use. Repeated measures analysis yielded an overall significant reduction of P50 amplitude between first and second stimulus ( p <.02), which was not different between the groups, a reduction of N100 amplitude, which was different for schizophrenia patients compared with healthy control subjects independent of cannabis use ( p <.02), and a significant interaction between diagnosis and chronic cannabis use on the reduction of the P200 amplitude ( p <.001). While chronic cannabis use was related with increased P200 suppression ratios in control subjects (with chronic cannabis use: 0.55 ± 0.04; without chronic cannabis use: 0.40 ± 0.03; p <.02), the reverse effect was found in schizophrenia (with chronic cannabis use: 0.36 ± 0.05; without chronic cannabis use: 0.54 ± 0.05; p <.02). This result remained significant after inclusion of potential confounders. Total lifetime cannabis use showed a significant correlation with the P200 suppression ratio in otherwise healthy control subjects ( r =.28, p <.007). By contrast, the duration of time since last cannabis use was significantly correlated with the P200 suppression ratio in schizophrenia patients ( r =.42, p <.002). In aggregate, these diverging effects of chronic cannabis use on P200 repetition suppression may suggest underlying alterations in the endocannabinoid system in schizophrenia.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2451902216301483; http://dx.doi.org/10.1016/j.bpsc.2016.10.004; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85008231220&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/29528297; https://linkinghub.elsevier.com/retrieve/pii/S2451902216301483; https://dx.doi.org/10.1016/j.bpsc.2016.10.004
Elsevier BV
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