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Related Concept Videos

Sensory Modalities01:15

Sensory Modalities

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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Somatosensation01:33

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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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Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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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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Related Experiment Video

Updated: Nov 28, 2025

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

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Response modality-dependent categorical choice representations for vibrotactile comparisons.

Yuan-Hao Wu1, Lisa A Velenosi1, Felix Blankenburg1

  • 1Neurocomputation and Neuroimaging Unit (NNU), Department of Education and Psychology, Freie Universität Berlin, Habelschwerdter Allee 45, 14195 Berlin, Germany.

Neuroimage
|November 28, 2020
PubMed
Summary
This summary is machine-generated.

This study reveals that the dorsal premotor cortex (PMd) and intraparietal sulcus (IPS) encode vibrotactile choices, independent of movement or stimulus order. These brain regions are crucial for tactile decision-making.

Keywords:
Categorical choiceFMRIMultivariate pattern analysisPerceptual decision makingVibrotactile comparison

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Sensory Perception

Background:

  • Previous studies implicated premotor regions in vibrotactile choice encoding.
  • These studies often linked choices to stimulus order and manual movements, leaving choice representation in isolation unclear.

Purpose of the Study:

  • To investigate how vibrotactile choices are represented when decoupled from sensorimotor components.
  • To identify brain regions involved in pure vibrotactile decision-making.

Main Methods:

  • Utilized functional magnetic resonance imaging with multivariate pattern analysis (fMRI-MVPA).
  • Employed a modified vibrotactile frequency discrimination task to isolate choice signals.

Main Results:

  • Identified the left contralateral dorsal premotor cortex (PMd) and intraparietal sulcus (IPS) as key areas for vibrotactile choice information.
  • Demonstrated that PMd and IPS encode choices beyond stimulus order and action selection.

Conclusions:

  • The PMd and IPS are involved in vibrotactile decisions, with IPS potentially computing choices and PMd storing movement-related information.
  • Vibrotactile choice representation is modality-dependent, as evidenced by comparison with oculomotor task findings.