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Related Concept Videos

Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

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 stimulus...
Somatosensation01:33

Somatosensation

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.
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

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 the...
Sensation01:21

Sensation

Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
Absolute thresholds can quantify the sensitivity of sensory...
Perception01:28

Perception

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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Related Experiment Video

Updated: May 30, 2026

Psychophysically-anchored, Robust Thresholding in Studying Pain-related Lateralization of Oscillatory Prestimulus Activity
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Habituation within the somatosensory processing hierarchy.

Carsten M Klingner1, Igor Nenadic, Caroline Hasler

  • 1Department of Neurology, University of Jena, Jena, Germany. carsten.klingner@med.uni-jena.de

Behavioural Brain Research
|August 16, 2011
PubMed
Summary
This summary is machine-generated.

Habituation, a learning process, shows decreased responses in the somatosensory network. This study found habituation increases most within the primary somatosensory cortex, suggesting early thalamocortical interactions are key.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Processing

Background:

  • Habituation is a fundamental learning process involving decreased responses to repeated stimuli.
  • It affects all human sensory systems, including the somatosensory network.
  • The precise origin of habituation within the somatosensory hierarchy remains unclear.

Purpose of the Study:

  • To investigate whether habituation effects distribute uniformly or distinctly across the somatosensory processing hierarchy.
  • To identify specific processing stages where habituation increases significantly.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed in 43 healthy subjects.
  • Unilateral electrical median nerve stimulation was administered using a block design.
  • The blood-oxygen-level-dependent (BOLD) response was analyzed to quantify habituation.

Main Results:

  • A time-dependent decrease in the positive BOLD response (habituation) was observed across the somatosensory network, excluding Brodmann area (BA) 3b.
  • Habituation effects increased most notably between subareas of the primary somatosensory cortex (BA3b, BA1, BA2).
  • No further increase in habituation was found in secondary somatosensory cortex or insula; a strong effect was noted in the thalamus.

Conclusions:

  • The increase in habituation along the somatosensory processing stream is primarily observed between primary somatosensory cortex subareas.
  • These findings suggest habituation originates early in the processing stream, potentially involving thalamocortical interactions.