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Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

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Published on: November 16, 2017

Sex differences in callosal transfer and hemispheric specialization for face coding.

Alice Mado Proverbio¹, Roberta Mazzara, Federica Riva

¹Department of Psychology, University of Milano-Bicocca, Piazza dell'Ateneo Nuovo 1, 20126 Milan, Italy. mado.proverbio@unimib.it

Neuropsychologia

|June 26, 2012

Summary

This summary is machine-generated.

Men show asymmetric inter-hemispheric transfer (IHTT) during face processing, while women exhibit symmetric transfer. This suggests sex differences in brain communication speed and lateralization for facial information.

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Area of Science:

Neuroscience
Cognitive Psychology
Human Brain Imaging

Background:

Previous research indicates reduced brain function lateralization in women versus men.
Inter-hemispheric transfer (IHTT) is often asymmetric in men (faster RH→LH) but symmetric in women.
Sex-based differences in hemispheric communication and face processing require further investigation.

Purpose of the Study:

To investigate sex differences in inter-hemispheric transfer (IHTT) and hemispheric lateralization during face processing.
To explore how the brain processes facial information and categorizes sex based on sex.
To analyze event-related potentials (ERPs) associated with face perception and inter-hemispheric communication.

Main Methods:

Recorded event-related potentials (ERPs) in 16 men and 17 women performing a face-sex categorization task.
Analyzed occipital P1 and occipito/temporal N170 components for lateralization patterns.
Measured inter-hemispheric transfer (IHTT) latencies in both directions (RH→LH and LH→RH).

Main Results:

Occipital P1 and N170 showed left lateralization in women and bilateral activation in men.
Inter-hemispheric transfer (IHTT) was asymmetric in men (faster RH→LH, 170 ms vs. LH→RH, 185 ms).
Inter-hemispheric transfer (IHTT) was symmetric in women, with similar latencies in both directions.

Conclusions:

Sex differences exist in hemispheric lateralization and inter-hemispheric transfer during face processing.
Asymmetric callosal transfer times in men may reflect faster transmission from more efficient to less efficient hemispheres.
Visual input transfer appears more rapid and symmetric in women compared to men.