Encyclopedia of Computational Neuroscience

Living Edition
| Editors: Dieter Jaeger, Ranu Jung

Somatosensory Cortex: Neural Coding of Motion

Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-7320-6_383-1

Synonyms

Definition

The tactile perception of motion involves the perception of movement of an object across the skin. Neural processing in the somatosensory cortex transforms the information originating from populations of afferents into a percept of the direction and speed of the tactile motion.

Detailed Description

Two Sources of Tactile Motion Information

The perception of tactile motion is thought to rely on two types of signals at the somatosensory periphery: the sequential activation of slowly adapting type 1 (SA1) (Johansson and Vallbo 1979) and rapidly adapting (RA) afferents (Kirman 1974; Sherrick and Rogers 1966) as an object moves across the skin and the activation of slowly adapting type 2 (SA2) afferents (Olausson et al. 2000) caused by friction-induced skin stretch resulting from motion (Olausson and Norrsell 1993).

Direction Tuning Emerged in the Primary Somatosensory Cortex

SA1 and RA afferents encode...

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References

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Chang Gung Memorial Hospital and UniversityTaoyuan CountyTaiwan