Touch perception altered by chronic pain and by opioid blockade

LK Case, M Čeko, JL Gracely, EA Richards… - Eneuro, 2016 - eneuro.org
Touch plays a significant role in human social behavior and social communication, and its
rewarding nature has been suggested to involve opioids. Opioid blockade in monkeys leads …

Effects of opioid receptor stimulation and blockade on touch pleasantness: a double-blind randomised trial

GE Løseth, M Eikemo, S Leknes - Social Cognitive and Affective …, 2019 - academic.oup.com
The μ-opioid receptor (MOR) system has long been thought to underpin the rewarding
properties of pleasant touch. Numerous non-human animal studies implicate MORs in social …

Coding of pleasant touch by unmyelinated afferents in humans

LS Löken, J Wessberg, F McGlone, H Olausson - Nature neuroscience, 2009 - nature.com
Pleasant touch sensations may begin with neural coding in the periphery by specific
afferents. We found that during soft brush stroking, low-threshold unmyelinated …

[HTML][HTML] The analgesic power of pleasant touch in individuals with chronic pain: Recent findings and new insights

M Fusaro, RJ Bufacchi, V Nicolardi… - Frontiers in Integrative …, 2022 - frontiersin.org
This mini-review covers recent works on the study of pleasant touch in patients with chronic
pain and its potential use as a treatment. While experiments have demonstrated that …

[HTML][HTML] The comfort in touch: Immediate and lasting effects of handholding on emotional pain

RS Sahi, MC Dieffenbach, S Gan, M Lee, LI Hazlett… - PloS one, 2021 - journals.plos.org
Consoling touch is a powerful form of social support that has been repeatedly demonstrated
to reduce the experience of physical pain. However, it remains unknown whether touch …

[HTML][HTML] Endogenous opioids contribute to the feeling of pain relief in humans

L Sirucek, RC Price, W Gandhi, ME Hoeppli, E Fahey… - Pain, 2021 - journals.lww.com
Endogenous opioids mediate the pleasurable responses to positively reinforcing stimuli
such as palatable food. Yet, the reduction or omission of a negative experience can also be …

[HTML][HTML] Anhedonia to gentle touch in fibromyalgia: Normal sensory processing but abnormal evaluation

R Boehme, H van Ettinger-Veenstra, H Olausson… - Brain Sciences, 2020 - mdpi.com
Social touch is important for interpersonal interaction. Gentle touch and slow brushing are
typically perceived as pleasant, the degree of pleasantness is linked to the activity of the C …

When touch predicts pain: predictive tactile cues modulate perceived intensity of painful stimulation independent of expectancy

DS Harvie, A Meulders, VJ Madden… - … Journal of Pain, 2016 - degruyter.com
Aims Non-nociceptive somatosensory input, such as tactile or proprioceptive information,
alway precedes nociceptive input during a painful event. This relationship provides clear …

[HTML][HTML] The neurobiology shaping affective touch: expectation, motivation, and meaning in the multisensory context

DM Ellingsen, S Leknes, G Løseth, J Wessberg… - Frontiers in …, 2016 - frontiersin.org
Inter-individual touch can be a desirable reward that can both relieve negative affect and
evoke strong feelings of pleasure. However, if other sensory cues indicate it is undesirable …

Habituation to pain: further support for a central component

C Rennefeld, K Wiech, ED Schoell, J Lorenz, U Bingel - Pain, 2010 - journals.lww.com
Habituation to repetitive painful stimulation may represent an important protection
mechanism against the development of chronic pain states. However, the exact …