PSYCH OpenIR  > 认知与发展心理学研究室
Alternative TitleResearch on the subcortical processing mechanisms of biosocial information
Thesis Advisor蒋毅,王莹
Degree Grantor中国科学院心理研究所
Place of Conferral中国科学院心理研究所
Degree Name理学博士
Degree Discipline认知神经科学
Keyword生物社会性信息 恐惧面孔 生物运动 皮层下加工机制






Other Abstract

Biosocial information is of great value to survival and adaptation. Subcortical mechanisms are needed by each individual for processing this kind of information rapidly and automatically. It is of significance to study these subcortical mechanisms. To this end, based on reviewing relevant references, two types of biosocial information, human faces and biological motion were chosen to study their subcortical processing mechanisms.

Study 1 increased (or decreased) the activities of the subcortical pathway by the priming (or adaptation) of emotional faces, and measured the dominant state of the subsequently presented Gabor patches of high and low spatial frequencies in the individual’s visual awareness with the method of binocular rivalry. It was found that fearful faces primed (or adapted to) could strengthen (or weaken) the dominance of Gabor patches with low spatial frequency in visual awareness relative to neutral faces. These results provided new behavioral evidence for the subcortical pathway hypothesis to some extent.

Study 2 used the technique of functional magnetic resonance imaging to observe brain activities of participants when the local biological motion was being processed. It was found that superior colliculus responded to local biological motion and the responses had laminar difference. And the strength of connectivities between superior colliculus and brain areas located in the cerebral cortex was affected by local biological motion (compared to inverted local biological motion), which also had laminar difference and existed in feedforward pathways from superior colliculus to brain areas located in the cerebral cortex. These results revealed the roles of superior colliculus and its layers with different depth played in local biological motion processing and demonstrated the brain networks involving superior colliculus which supported these roles.

Study 3 applied the rapid flicker fusion technique to suppress biological motion stimuli to unconsciousness and took the changes of time perception as indicators to evaluate biological motion processing. It showed that intact biological motion could still lengthen time perception though the involvement of high-level brain areas was reduced by rapid flicker fusion. This study demonstrated little dependence of intact biological motion processing on high-level areas which could be affected by suppressing.

All three studies directly or indirectly proved that biosocial information represented by faces and biological motion could be processed in subcortical areas, in which superior colliculus may be an important structure that served a function.

Document Type学位论文
Recommended Citation
GB/T 7714
胡召起. 生物社会性信息的皮层下加工机制研究[D]. 中国科学院心理研究所. 中国科学院心理研究所,2020.
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