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Sensory Perception: Organization of the Somatosensory System01:11

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
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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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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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Related Experiment Video

Updated: Nov 18, 2025

Cerebral Blood Flow-Based Resting State Functional Connectivity of the Human Brain using Optical Diffuse Correlation Spectroscopy
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Sensory Processing Sensitivity Predicts Individual Differences in Resting-State Functional Connectivity Associated

Bianca P Acevedo1, Tyler Santander2, Robert Marhenke3

  • 1Department of Psychological and Brain Sciences, University of California, Santa Barbara, Santa Barbara, California, USA, bacevedo@ucsb.edu.

Neuropsychobiology
|February 9, 2021
PubMed
Summary

Sensory processing sensitivity (SPS) is linked to stronger brain connectivity in attention and emotion networks. This suggests individuals with high SPS process information more deeply, impacting their environmental responses.

Keywords:
AmygdalaEmotionHippocampusHuman brainSensory processing sensitivityTemperamentfMRI

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Area of Science:

  • Neuroscience
  • Psychology
  • Temperament Research

Background:

  • Sensory processing sensitivity (SPS) is a trait influencing awareness and responsiveness to stimuli.
  • High SPS can lead to overarousal, cognitive depletion, and fatigue due to environmental sensitivity.

Purpose of the Study:

  • To investigate the relationship between sensory processing sensitivity (SPS) and resting-state brain connectivity.
  • To explore neural correlates of heightened environmental awareness in adults.

Main Methods:

  • Functional MRI (fMRI) was used to assess resting-state brain connectivity in adults.
  • The Highly Sensitive Person (HSP) Scale measured SPS, which was correlated with brain connectivity data.

Main Results:

  • Greater SPS correlated with enhanced connectivity in ventral attention, dorsal attention, and limbic networks.
  • Specific increases in connectivity were observed between the hippocampus and precuneus, while decreases were noted involving the amygdala and insula.

Conclusions:

  • SPS is associated with brain connectivity related to attentional control, memory consolidation, and cognitive processing.
  • Findings support the 'depth of processing' theory of SPS, highlighting its neural underpinnings.