Experimental Brain Research

, Volume 210, Issue 1, pp 117–129 | Cite as

Differing proportions of ‘express saccade makers’ in different human populations

Research Article
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Abstract

Debate continues about cultural influences on processes such as perception and memory. One underlying assumption is that high level, top-down influences that differ between populations (culture) act on identical brain structures and functions to produce different behaviours. More specifically, it has been reported that in various types of complex visual task, eye movement patterns differ systematically between Chinese and non-Chinese subjects. We investigated a relatively simple behaviour (reflexive eye saccades), comparing the saccade latency distributions of Chinese and Caucasian subjects. In a task in which the fixation target remained illuminated when the saccade target appeared (overlap task), 10 out of 34 (29%) Chinese subjects exhibited a high proportion (>30%) of low latency ‘express’ saccades. This pattern of response had been reported to be very uncommon in healthy, naïve subjects. We therefore subsequently confirmed that only 1 out of 38 Caucasian subjects exhibited it. The results suggest important population differences with regard to the expression of distinct oculomotor behaviours.

Keywords

Saccades Express saccades Latency Fixation 
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Notes

Acknowledgments

This study was supported by the National Natural Science Foundation of China (Grant No. 81030027) and a UK Royal Society International Joint Project grant (Grant No. 30711130226).

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Huaxi MR Research Centre, Department of Radiology, Centre for Medical Imaging, West China HospitalSichuan UniversityChengduChina
  2. 2.Division of OrthopticsUniversity of LiverpoolLiverpoolUK

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