Visuo-haptic object perception and hierarchical inference model = 시촉각 물체 인식과 계층적 추론 모델

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Visuo-haptic information is essential for efficient object perception. Here we investigated the neural response to congruent and incongruent visuo-haptic object stimuli using fMRI. Compared to incongruent stimuli, congruent visuo-haptic stimuli evoked bigger response in early sensory cortex as well as traditional multisensory area such as lateral occipital cortex (LOC) and posterior parietal cortex (PPC). The congruency effect in the early sensory cortex contrasts with the traditional view that multisensory processing occurs at the high level association cortex where information from different primary sensory cortex converges. However, a recent hierarchical inference model of the brain provides an elegant explanation for the involvement of sensory-specific cortex as well as high level cortex. Precision or gain of early sensory channels can be larger for congruent multisensory input because the channels are regarded as more reliable sources that facilitate the inference process. Furthermore, higher multi-voxel pattern reproducibility was observed for the congruent stimuli and it also implies more reliable inference on the sensory cause.
Advisors
Kim, Dae-Shikresearcher김대식
Description
한국과학기술원 : 전기및전자공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
566521/325007  / 020114307
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학과, 2013.8, [ iv, 49 p. ]

Keywords

visuo-haptic; 기능성 자기공명영상; 계층적 추론 모델; sensory congruency; 물체인식; 시촉각; object perception; sensory congruency; hierarchical inference model; fMRI

URI
http://hdl.handle.net/10203/196693
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=566521&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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