Saccadic eye movement in individuals with ultra high‐risk psychosis and bipolar disorder

Abstract

AbstractBackgroundThe purpose of the study is to examine saccadic eye movements, and the relationship with motor functions based on the cerebellar connection among individuals with ultra‐high‐risk of psychosis and bipolar disorder (UHR‐P, UHR‐BD) and healthy controls (HC).MethodThe study included 20 UHR‐P (mean age 21.95±3.38), 20 UHR‐BD (mean age 21.45±4.27), and 19 HC (mean age 24.84±3.95). Participants had been selected from cases clinical‐high‐risk criteria in interviews made with The Structured Interview of Psychosis Risk Syndromes (SIPS) and Bipolar Prodrome Symptom Interview and Scale (BPSS). Correct and incorrect count, amplitude and latency of anti‐saccade were used to evaluate eye movements. Eye movement data were recorded from the right eye using an EyeLink 1000 Plus eye‐tracker. In addition, Brief Motor Scale (BMS) was used to evaluate motor functions.ResultThe number of correct saccade of anti‐saccade showed a significant difference between HC and UHR‐BD (p = 0.021). The Correct anti‐saccades were strongly correlated with motor function in UHR‐BD (r = ‐0.754, p<0.000). There was a moderate positive correlation between incorrect responses of anti‐saccade and motor function in UHR‐BD. (r = 0.455, p = 0.044). Motor functions indicated statistically significant differences between HC and high‐risk groups (p = 0.002 and p< 0.000). No significant relationship was found between anti‐saccade latency and amplitude and motor functions. (p> 0.05).ConclusionWe indicated that patients with ultra‐high risk had saccadic inhibition and motor coordination‐sequencing problems. This may be related to the dysfunctions in the cerebellum. The results are preliminary data of an ongoing study.