By Håkan Olausson, Johan Wessberg, India Morrison, Francis McGlone
CT afferents are receptors in mammalian bushy pores and skin that fireplace motion potentials while the surface is touched evenly which makes them really very important in affective touch. generally neuroscientific learn has interested in extra discriminative and haptic houses of contact that are mediated by means 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 tackle (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) scientific relevance, (6) advertisement relevance, and (7) destiny study considerations.
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Additional resources for Affective Touch and the Neurophysiology of CT Afferents
C) Stimulus response curves for six CT afferents demonstrating effect of indentation amplitudes Response to Amplitude of Skin Deformation As with other kinds of cutaneous mechanoreceptive units, CT afferents are sensitive to the amount of local skin indentation as illustrated in Fig. 13. However, a difference is that CT afferents tend to respond less consistently to local indentations than Aβ mechanoreceptive afferents. Hence, stimulus response relation curves often emerge as irregular, nonmonotonous, and highly varying between individual CT units (Fig.
Vallbo et al. To sum up, there is essentially no experimental support for the two alternatives to the social touch hypothesis. Rather, available data speak against them. In contrast, a number of observations are consistent with the social touch hypothesis. Evidence from psychoneural correlation studies strongly suggest that CT activation is associated with hedonic effects. Moreover, supporting findings are provided by studies of CLTMR system in rodents. Particularly interesting is the demonstration that pharmacogenetic activation of one part of the CLTMR system has a positively reinforcing effect on behavior suggesting an anxiolytic potential (Vrontou et al.
No attempt has been made to explore which factors may account for the poor consistency of the CT response in man. However, it is noteworthy that the finding shown in Fig. 13c seems to clash with data from a study of CLTMR afferents in the cat where high correlations are reported between indentation amplitude and unit response (Iggo and Kornhuber 1977). To what extent this difference is related to heterogeneity of CLTMRs in furry animals remains to be explored. 1 Sensual Touch: A Slow Touch System Revealed with Microneurography 23 Response to Hair Movements Qualitative observations indicate that human CT afferents do not regularly respond to hair movements.