Download e-book for iPad: 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

ISBN-10: 149396416X

ISBN-13: 9781493964161

ISBN-10: 1493964186

ISBN-13: 9781493964185

CT afferents are receptors in mammalian furry pores and skin that fireplace motion potentials whilst the outside is touched evenly which makes them rather vital in affective touch.  ordinarily neuroscientific learn has all for extra discriminative and haptic houses of contact that are mediated via 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 latest wisdom during this nascent box. Separate sections will deal with (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 examine considerations.​

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15 Responses to moving touch stimuli. Contrast between Aβ and CT afferents. CT exhibit tuning to intermediate speeds of movement, whereas all types of Aβ afferents exhibit monotonous increase of impulse rate with speed of movement. Panels show data from individual units. 4 N) as indicated by color code. Stimulus was delivered with of a soft water color brush moving along the skin surface. Note difference in Y-scales with CT and Aβ units The response increases to a peak at stroking velocities in the range 1–10 cm s−1, whereas it levels off at higher and lower speeds.

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.

Note off responses. (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.

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


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