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Related Concept Videos

Perception01:28

Perception

911
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.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
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Somatosensation01:33

Somatosensation

42.8K
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 Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

10.9K
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:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
10.9K
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

639
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.
639
Gestalt Principles of Perception01:21

Gestalt Principles of Perception

952
Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
952
Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

654
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
654

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Related Experiment Video

Updated: Dec 31, 2025

Tactile Semiautomatic Passive-Finger Angle Stimulator TSPAS
04:40

Tactile Semiautomatic Passive-Finger Angle Stimulator TSPAS

Published on: July 30, 2020

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Turning Touch into Perception.

Ranulfo Romo1, Román Rossi-Pool2

  • 1Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico; El Colegio Nacional, 06020 Mexico City, Mexico.

Neuron
|January 10, 2020
PubMed
Summary
This summary is machine-generated.

Brain activity in areas beyond primary somatosensory cortex (S1) tracks stimulus perception. The midbrain dopamine system may encode subjective sensory magnitude, offering new insights into sensation processing.

Keywords:
behaving monkeysbimodal sensory codingconscious sensory experiencedecision makingmicrostimulationmidbrain dopamine systemneural codingperceptionpopulation codingpsychophysicssensationsensory and frontal corticessomatosensory thalamusworking memory

More Related Videos

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

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Related Experiment Videos

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Computational Neuroscience

Background:

  • Brain activity changes during vibrotactile tasks, potentially encoding stimulus parameters, perception, or reports.
  • Understanding the neural basis of sensory perception is crucial for neuroscience.

Purpose of the Study:

  • To investigate how different brain areas process vibrotactile information.
  • To identify the neural correlates of stimulus coding, perception, and subjective magnitude.

Main Methods:

  • Analysis of neural activity in behaving monkeys during vibrotactile tasks.
  • Comparison of neuronal coding in the somatosensory thalamus, primary somatosensory cortex (S1), downstream areas, and the midbrain dopamine system.

Main Results:

  • Neurons in the somatosensory thalamus and S1 primarily code stimulus parameters during stimulation.
  • Areas downstream of S1 code stimulus parameters during tasks and perception.
  • The midbrain dopamine system shows evidence of coding the subjective magnitude of sensory percepts.

Conclusions:

  • Sensory processing involves hierarchical transformations from stimulus coding to perception in downstream brain areas.
  • The midbrain dopamine system plays a previously unrecognized role in sensory perception, specifically in coding subjective magnitude.
  • These findings advance our understanding of the neural mechanisms underlying the transformation of sensation into perception.