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Related Concept Videos

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Conceptual Associations Generate Sensory Predictions.

Chuyao Yan1,2, Floris P de Lange2, David Richter3,4,5

  • 1School of Psychology, Nanjing Normal University, Nanjing 210097, China.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|April 14, 2023
PubMed
Summary
This summary is machine-generated.

The human brain uses learned conceptual associations to form predictions, influencing sensory processing. This study shows conceptual priors generalize to modulate visual cortex activity for expected stimuli.

Keywords:
conceptual associationsexpectation suppressionperceptionpredictive processing

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Sensory Perception

Background:

  • The brain predicts future events using learned associations.
  • Existing research focuses on perceptual predictions, not conceptual ones.
  • The role of abstract conceptual knowledge in sensory prediction is unclear.

Purpose of the Study:

  • To investigate if conceptual associations modulate visual sensory responses.
  • To determine how the brain generates sensory predictions from abstract knowledge.
  • To examine the specificity of these predictive modulations.

Main Methods:

  • Participants learned arbitrary word-word associations.
  • fMRI BOLD responses were measured during a word-picture association task.
  • Stimuli either conformed to or violated learned conceptual associations.

Main Results:

  • Pictures matching expected words showed suppressed sensory responses in the ventral visual stream, including early visual cortex.
  • These modulations were category-specific, suppressing neural populations tuned to expected input.
  • Learned conceptual priors generalized to generate predictions for visual stimuli.

Conclusions:

  • The brain uses recently acquired conceptual priors across domains to generate category-specific sensory predictions.
  • Conceptual associations actively modulate visual processing, facilitating the perception of expected stimuli.
  • This extends understanding of predictive coding and the brain's use of prior knowledge.