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Levy DL, Holzman PS, Proctor LR. Vestibular responses in schizophrenia. Arch Gen Psychiatry. 1978;35(8):972-81doi: 10.1001/archpsyc.1978.01770320066005.
Levy, D. L., Holzman, P. S., & Proctor, L. R. (1978). Vestibular responses in schizophrenia. Archives of general psychiatry, 35(8), 972-81. https://doi.org/10.1001/archpsyc.1978.01770320066005
Levy, D L, et al. "Vestibular responses in schizophrenia." Archives of general psychiatry vol. 35,8 (1978): 972-81. doi: https://doi.org/10.1001/archpsyc.1978.01770320066005
Levy DL, Holzman PS, Proctor LR. Vestibular responses in schizophrenia. Arch Gen Psychiatry. 1978 Aug;35(8):972-81. doi: 10.1001/archpsyc.1978.01770320066005. PMID: 28103.
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Arch Gen Psychiatry. 1978 Aug;35(8):972-81. doi: 10.1001/archpsyc.1978.01770320066005.

Vestibular responses in schizophrenia.

Archives of general psychiatry

D L Levy, P S Holzman, L R Proctor

PMID: 28103 DOI: 10.1001/archpsyc.1978.01770320066005

Abstract

In a study of vestibular responses to caloric stimulation that controlled opportunity for fixation and state of alertness, we evaluated previous findings of diminished nystagmus in schizophrenia. We failed to replicate earlier reports in these respects: (1) None of the psychotic patient groups, when compared with normal controls, showed lower response intensity, latency, or culmination time of the nystagmic response. (2) The schizophrenic groups did not manifest a prevalence of clinically significant asymmetry. We did, however, observe that chronic deteriorated schizophrenics and recent schizophrenics have significantly greater dysrhythmic responses. This diminished orderliness of nystagmus may explain previous reports of absent or diminished nystagmus in the schizophrenics. The results are not compatible with peripheral vestibular disease in schizophrenia, but they may reflect state-related phenomena consistent with disturbances in alertness, which are not necessarily voluntary or motivational in origin.

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