By Håkan Olausson, Johan Wessberg, India Morrison, Francis McGlone
CT afferents are receptors in mammalian bushy epidermis that fireplace motion potentials while the surface is touched calmly which makes them quite very important in affective touch. routinely neuroscientific study has fascinated by extra discriminative and haptic houses of contact that are mediated by way of large myelinated afferents and the coding homes and practical 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 handle (1) how we will be able to degree affective contact, (2) CT constitution and body structure, (3) CT processing, (4) the contribution of CTs to sexual habit, (5) medical relevance, (6) advertisement relevance, and (7) destiny study considerations.
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Extra info for Affective Touch and the Neurophysiology of CT Afferents
While he concluded that they subserve the sensation of tickle, more recent work suggests a grooming phenotype based on their robust response to gentle, slowly moving stimulation of hairy skin (Bessou et al. 1971; Kumazawa and Perl 1977; Li et al. 2011). Perhaps due to these unique properties they have only recently 2 Functional Properties of C-Low Threshold Mechanoreceptors (C-LTMRs)… 33 garnered the attention of the wider neuroscience community as well as the public. In this chapter, we will review the functional characteristics of C-LTMRs.
On the other hand, the finding is of some interest from psychoneural point of view because the subjects consistently reported no change of the sensation when the intense firing of the CT afferent occurred. Thus, it seems that activity in a single CT afferent fails to influence the sensation of sustained skin deformation. 1 Sensual Touch: A Slow Touch System Revealed with Microneurography 21 Fig. 11 CT response to sustained indentation. (a) Sample record to illustrate intermediate adaptation typical for CT.
1 Hz frequency moderately well for up to 90 s (Bessou et al. 1971). Nonetheless, Gee et al. (1996) showed that C-LTMR ﬁbers could follow 20 Hz electrical stimulation for up to 20 s. The inability to maintain consistent spike output in response to repeated mechanical stimuli to their RF reﬂects fatigue, to be discussed in more detail later. Cooling Kumazawa and Perl (1977) showed that while C-LTMRs do not respond to warming of the skin, they respond robustly to progressive cooling of the skin. Hahn (1971) demonstrated that cooling the skin attenuates responses to mechanical stimulation, such that cooling appears to produce cross-modal fatigue.