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Two Forms of Knowledge Representations in the Human Brain.

Xiaoying Wang1, Weiwei Men2, Jiahong Gao3

  • 1State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China; Beijing Key Laboratory of Brain Imaging and Connectomics, Beijing Normal University, Beijing 100875, China.

Neuron
|May 11, 2020
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Summary
This summary is machine-generated.

The human brain stores object knowledge through both sensory experiences and language. A sensory-independent system in the brain supports object-color knowledge in both blind and sighted individuals.

Keywords:
colorembodiedhumanknowledgelanguagememorysensorysymbolicvisualvisual deprivation

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Background:

  • Sensory experiences, like sight, significantly influence how the brain stores knowledge.
  • Object-color knowledge is typically acquired through visual perception in sighted individuals.

Purpose of the Study:

  • To investigate the neural basis of object-color knowledge in congenitally blind individuals compared to sighted individuals.
  • To identify whether knowledge representation in the brain is solely dependent on sensory input or if alternative pathways exist.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to compare brain activity between blind and sighted participants.
  • Participants' ability to access object-color knowledge was assessed, considering both sensory-derived and language-derived information.

Main Results:

  • Sighted individuals utilized specific brain regions for color knowledge that were dependent on visual sensory input.
  • A distinct region in the left dorsal anterior temporal lobe demonstrated activity related to object-color knowledge in both blind and sighted groups.
  • This suggests a shared, sensory-independent neural system for processing certain types of knowledge.

Conclusions:

  • The human brain employs at least two distinct systems for representing object knowledge: one derived from sensory input and another from language and cognitive inference.
  • The left dorsal anterior temporal lobe plays a crucial role in a sensory-independent knowledge coding system.
  • This finding highlights the brain's remarkable plasticity and its capacity to build knowledge representations through diverse pathways.