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Related Concept Videos

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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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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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Somatosensation01:33

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Related Experiment Video

Updated: Sep 19, 2025

Studying the Coding Profiles of Somatic Stimulation on Cardiac-locked Neuronal Responses in the Rat Spinal Dorsal Horn
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Interplay Between Cortical and Neurocardiac Interoceptive Processes and its Association with Self-Reported

Mariana Oliveira1, Márcia da-Silva1, Lídia Carvalho1

  • 1Psychological Neuroscience Laboratory (PNL), Research Center in Psychology (CIPsi), School of Psychology, University of Minho, Braga, Portugal.

Brain Topography
|June 3, 2025
PubMed
Summary

Self-reported interoception via the Body Perception Questionnaire (BPQ) showed limited alignment with physiological measures. However, specific BPQ scores correlated with brain activity patterns (EEG microstates), suggesting complex interoceptive processing.

Keywords:
Heart-Brain AxisHeartbeat Evoked PotentialsInteroceptionMicrostates

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Area of Science:

  • Neuroscience
  • Psychophysiology
  • Cognitive Science

Background:

  • Interoception, the perception of internal bodily signals, is vital for emotional regulation and decision-making.
  • Existing research often relies on self-report measures, but their psychophysiological validity requires further investigation.

Purpose of the Study:

  • To examine the relationship between self-reported interoceptive processes (using the Body Perception Questionnaire) and objective psychophysiological markers.
  • To explore correlations between subjective interoceptive sensibility and objective measures of cardiac autonomic function, cortical processing of cardiac signals, and brain electrical activity (EEG microstates).

Main Methods:

  • Sixty-four healthy volunteers underwent resting-state EEG and ECG recordings.
  • Self-reported interoception was assessed using the Body Perception Questionnaire (BPQ).
  • Psychophysiological measures included heart rate variability (HF-HRV, RMSSD), heartbeat-evoked potentials (HEPs), and EEG microstate analysis.

Main Results:

  • A positive association was found between a specific BPQ subscale (Subdiaphragmatic Reactivity) and EEG microstate A, linked to arousal and sensory processing.
  • No significant associations were observed between overall BPQ scores and cardiac autonomic markers (HRV) or HEP amplitudes.
  • Significant associations emerged between HEP amplitudes and microstates A/B, and between HRV measures and microstate D, indicating links between autonomic function and brain activity.

Conclusions:

  • Self-reported interoceptive sensibility, as measured by the BPQ, may not fully capture the complexity of psychophysiological interoceptive processes.
  • While subjective reports showed limited overlap with objective cardiac and cortical measures, specific correlations between BPQ subscales and EEG microstates suggest nuanced relationships.
  • Further research is needed to elucidate the intricate interplay between subjective and objective interoceptive measures and their implications for cognitive and emotional functions.