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DTSTAMP:20250704T144624Z
DESCRIPTION:Yukiyasu Kamitani presents\, 'Reconstructing visual and subject
 ive experience from the brain'.\n\nRegistration via Eventbrite.\n\nLivestr
 eaming via Vimeo. \n\nSpeaker: Yukiyasu Kamitani\, Ph.D.\n\nProfessor\, Gr
 aduate School of Informatics\, Kyoto University\, Kyoto\, Japan\n\nDepartm
 ent Head and ATR Fellow\, ATR Computational Neuroscience Laboratories\n\nA
 bstract: The internal visual world is thought to be encoded in hierarchica
 l representations of the brain. However\, previous attempts to visualize p
 erceptual contents based on machine-learning analysis of fMRI patterns hav
 e been limited to reconstructions with low level image bases or to matchin
 gs to exemplars. While categorical decoding of imagery contents has been d
 emonstrated\, the reconstruction of internally generated images has been c
 hallenging. I introduce our recent study showing that visual cortical acti
 vity can be decoded (translated) into the hierarchical features of a pre-t
 rained deep neural network (DNN) for the same input image\, providing a wa
 y to make use of the information from hierarchical visual features. Next I
  present a novel image reconstruction method\, in which the pixel values o
 f an image are optimized to make its DNN features similar to those decoded
  from human brain activity at multiple layers. Our method was able to reli
 ably produce reconstructions that resembled the viewed natural images. Whi
 le the model was solely trained with natural images\, it successfully gene
 ralized to artificial shapes\, indicating that our model was not simply ma
 tching to exemplars. The same analysis applied to mental imagery demonstra
 ted rudimentary reconstructions of the subjective content. Our method can 
 effectively combine hierarchical neural representations to reconstruct per
 ceptual and subjective images\, providing a new window into the internal c
 ontents of the brain.\n\nThe Feindel Virtual Brain and Mind (VBM) Seminar 
 Series will advance the vision of Dr. William Feindel (1918–2014)\, Former
  Director of the Neuro (1972–1984)\, to constantly bridge the clinical and
  research realms. The talks will highlight the latest advances and discove
 ries in neuropsychology\, cognitive neuroscience\, and neuroimaging.\n\nSp
 eakers will include scientists from across The Neuro\, as well as colleagu
 es and collaborators locally and from around the world. The series is inte
 nded to provide a virtual forum for scientists and trainees to continue to
  foster interdisciplinary exchanges on the mechanisms\, diagnosis and trea
 tment of brain and cognitive disorders.\n
DTSTART:20210310T140000Z
DTEND:20210310T150000Z
SUMMARY:Feindel Virtual Brain and Mind Lecture Series: Reconstructing visua
 l and subjective experience from the brain
URL:/neuro/channels/event/feindel-virtual-brain-and-mi
 nd-lecture-series-reconstructing-visual-and-subjective-experience-brain-32
 9228
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