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Related Concept Videos

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.
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Association Areas of the Cortex01:21

Association Areas of the Cortex

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:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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...
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
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...

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Related Experiment Video

Updated: Jul 23, 2026

Cross-Modal Multivariate Pattern Analysis
13:51

Cross-Modal Multivariate Pattern Analysis

Published on: November 9, 2011

Somatosensory input to auditory association cortex in the macaque monkey.

C E Schroeder1, R W Lindsley, C Specht

  • 1Cognitive Neuroscience and Schizophrenia Program, Nathan Kline Institute for Psychiatric Research, Orangeburg 10962, New York, New York 10003, USA. schrod@nki.rfmh.org

Journal of Neurophysiology
|March 15, 2001
PubMed
Summary

Somatosensory and auditory inputs converge in macaque auditory cortex, specifically in regions outside primary auditory cortex (A1). This multisensory integration occurs early in auditory processing, suggesting a new neural basis.

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Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation
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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Multisensory Processing

Background:

  • The auditory cortex processes auditory information, but the integration of other sensory modalities is less understood.
  • Previous research has hinted at cross-modal interactions within the auditory cortex.

Purpose of the Study:

  • To investigate the convergence of somatosensory and auditory inputs within subregions of the macaque auditory cortex.
  • To identify specific areas within the auditory cortex that receive and process somatosensory information.

Main Methods:

  • Used laminar current source density and multiunit activity recordings with linear array multielectrodes in awake macaques.
  • Presented auditory stimuli (clicks, tones, noise) and somatosensory stimuli (median nerve stimulation).
  • Mapped auditory cortex regions based on best frequency, stimulus preferences, and histological analysis.

Main Results:

  • Found robust somatosensory responses co-represented with auditory responses in regions immediately caudomedial to the primary auditory cortex (A1).
  • Observed feedforward response patterns and high temporal overlap between auditory and somatosensory inputs in these regions.
  • No somatosensory responses were detected in A1, but they were present in the caudomedial auditory association cortex.

Conclusions:

  • Somatosensory inputs are integrated with auditory inputs in specific subregions of the macaque auditory cortex, outside of A1.
  • This integration occurs at an early stage of auditory cortical processing, indicating a potential neural substrate for multisensory integration.
  • The findings expand our understanding of auditory cortex function beyond purely auditory processing.