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Related Concept Videos

Somatosensation01:33

Somatosensation

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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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Motor and Sensory Areas of the Cortex01:14

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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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Association Areas of the Cortex01:21

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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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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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Tactile and Chemical Senses01:27

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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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Related Experiment Video

Updated: May 2, 2026

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
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Are visual texture-selective areas recruited during haptic texture discrimination?

Samantha K Podrebarac1, Melvyn A Goodale1, Jacqueline C Snow2

  • 1The Brain and Mind Institute, The University of Western Ontario, London, ON N6A 5B7, Canada.

Neuroimage
|March 22, 2014
PubMed
Summary
This summary is machine-generated.

This study investigated how the brain processes texture through touch versus vision. Functional magnetic resonance imaging (fMRI) revealed distinct brain regions for haptic texture perception, separate from visual texture processing areas.

Keywords:
Collateral sulcusHapticsLateral occipital complexShapeTextureVision

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Sensory Processing

Background:

  • Object identity is perceived through shape and texture cues, processed via vision and haptics.
  • Visual shape is processed in the lateral occipital complex (LOC), while visual texture is processed in the collateral sulcus (CoS).
  • The LOC is known to be involved in both visual and haptic shape perception.

Purpose of the Study:

  • To determine if brain regions selective for visual texture are also activated during haptic texture discrimination.
  • To investigate the neural basis of texture perception across different sensory modalities.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed.
  • A blocked design was used where participants discriminated the texture or shape of 3D objects.
  • Stimuli were explored using either vision or touch (haptics).

Main Results:

  • Haptic texture discrimination elicited significant fMRI responses in the medial occipitotemporal cortex.
  • These haptic texture-selective areas were adjacent to, but did not overlap with, visual texture-selective areas.
  • Distinct, modality-specific brain regions in the ventromedial temporal cortex were identified for visual and haptic texture perception.

Conclusions:

  • The brain utilizes spatially distinct neural populations for processing visual versus haptic texture.
  • While overlapping regions in the ventromedial temporal cortex are involved in both modalities, specific areas appear to be modality-specific for texture perception.