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Does left-handedness confer resistance to spatial bias?
Corinne A Bareham1, Tristan A Bekinschtein2, Sophie K Scott3
11] MRC Cognition and Brain Sciences Unit, 15 Chaucer Road, Cambridge, CB2 7EF, United Kingdom [2] Queensland Brain Institute, The University of Queensland, Brisbane, Australia.
Drowsiness shifts attention differently in non-right-handers compared to right-handers. This finding suggests handedness influences spatial attention biases and resilience to neglect symptoms.
Area of Science:
- Cognitive Neuroscience
- Neuroscience of Attention
- Human Lateralization
Background:
- Drowsiness is linked to left-inattention in right-handers.
- Spatial bias modulation relates to alertness in neglect patients.
- Previous studies focused exclusively on right-handed individuals.
Purpose of the Study:
- Investigate spatial attention biases in non-right-handers during drowsiness.
- Compare attentional shifts in non-right-handers versus right-handers.
- Explore the role of handedness in spatial attention and neglect.
Main Methods:
- Auditory spatial localization task.
- Electroencephalography (EEG) to index drowsiness.
- Study conducted on 26 healthy non-right-handed individuals.
Main Results:
- Non-right-handers exhibited a leftward shift in attention with drowsiness.
- This contrasts with the rightward shift observed in right-handers.
- Handedness significantly affects the direction of spatial attention bias.
Conclusions:
- Handedness influences the development and severity of spatial biases.
- Non-right-handers may possess resilience to clinical neglect symptoms.
- Findings explain the disproportionate persistence of left neglect in right-handers.
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