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Affective Touch and the Neurophysiology of CT Afferents by Håkan Olausson, Johan Wessberg, India Morrison, Francis

By Håkan Olausson, Johan Wessberg, India Morrison, Francis McGlone

CT afferents are receptors in mammalian furry dermis that fireside motion potentials whilst the surface is touched calmly which makes them quite vital in affective touch.  commonly neuroscientific learn has eager about extra discriminative and haptic homes of contact that are mediated by means of large myelinated afferents and the coding homes and useful association of unmyelinated CT afferents were studied a lot less.  The proposed quantity will draw jointly current wisdom during this nascent box. Separate sections will deal with (1) how we will degree affective contact, (2) CT constitution and body structure, (3) CT processing, (4) the contribution of CTs to sexual habit, (5) scientific relevance, (6) advertisement relevance, and (7) destiny examine considerations.​

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Extra resources for Affective Touch and the Neurophysiology of CT Afferents

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To sum up, two key features of caressing gestures were tested in the studies illustrated in Figs. 17. The findings demonstrate significant correlations between CT activity and estimates of pleasantness when two different stimulus parameters were varied, that is, the speed of an object moving over the skin surface 26 Å. Vallbo et al. Fig. 17 Dependence of psychoneural relation on temperature of moving touch stimuli. Lefthand plot shows CT response (n = 8) to an object moving over the receptive field at different speeds.

Pitcher et al. Fig. 1 The receptive field of a C mechanoreceptor. (a) shows five records obtained when different spots on the skin were touched with the probe. The final load is nearly the same (2 g weight) for all positions. The distances of the probe from the most sensitive central position are indicated in millimeters. (b) is a diagram summarizing all the results for the same unit. The skin was stimulated on a 1 mm grid and each spot is indicated by a filled circle in the diagram. The latency of the first impulse at each position is shown by the shading.

Single fibers can respond to barely perceptible mechanical stimuli such as the bending of a single guard or down hair (Douglas and Ritchie 1957; Iggo and Kornhuber 1977) or less than 4 mg punctate stimulation with a von Frey filament (Iggo 1960; Bessou and Perl 1969; Kumazawa and Perl 1977; Lynn and Carpenter 1982), which is consistent with C-tactile sensitivity in humans (Vallbo et al. 1999). A remarkable characteristic of these fibers is their specific tuning to a velocity range: Using in vivo electrophysiological recordings from cat DRG, Bessou et al.

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