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Related Concept Videos

Brain Imaging01:14

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping
13:12

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Published on: August 12, 2019

Imaging prior information in the brain.

Scott Gorlin1, Ming Meng, Jitendra Sharma

  • 1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. scott@scottgorlin.com

Proceedings of the National Academy of Sciences of the United States of America
|April 28, 2012
PubMed
Summary
This summary is machine-generated.

The brain uses both sensory input and past experiences to interpret images. New research shows prior knowledge enhances information in visual brain regions, suggesting complex top-down influences beyond simple attention.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Vision

Background:

  • Visual perception relies on bottom-up sensory data and top-down cognitive influences.
  • Distinguishing these influences is crucial for understanding visual processing.
  • Prior knowledge aids recognition of degraded stimuli, offering a method to study top-down effects.

Purpose of the Study:

  • To quantify information in brain regions related to visual stimuli.
  • To investigate how prior knowledge (top-down influences) affects neural processing of degraded images.
  • To differentiate top-down influences from classical priming mechanisms.

Main Methods:

  • Utilized machine learning algorithms to measure information content in brain regions.
  • Employed degraded visual stimuli that are recognizable with prior knowledge.
  • Analyzed neural data during the learning of coherent images.

Main Results:

  • Several brain regions, including high-level visual areas and the retinotopic cortex, showed increased information about degraded stimuli with prior knowledge.
  • These information-carrying regions were distinct from areas exhibiting classical priming.
  • Demonstrated that top-down influences extend beyond feature-based attention.

Conclusions:

  • Neural processing of complex visual information is rapidly shaped by recent experiences.
  • Top-down influences in visual perception are multifaceted and involve distinct neural substrates.
  • Prior knowledge significantly enhances the brain's ability to interpret ambiguous visual data.