Activation and sensitization of trigeminovascular nociceptive pathways is believed to contribute to the neural substrate of the severe and throbbing nature of pain in migraine. Endocannabinoids, as well as being physiologically analgesic, are known to inhibit dural trigeminovascular nociceptive responses. They are also involved in the descending modulation of cutaneous-evoked C-fiber spinal noc...

Hydrogen sulfide (H2S), a well-established member of the gasotransmitter family, is involved in a variety of physiological functions, including pro-nociceptive action in the sensory system. Although several reports have shown that H2S activates sensory neurons, the molecular targets of H2S action in trigeminal (TG) nociception, implicated in migraine, remains controversial. In this study, using...

The role of the cerebellum in modulating nociceptive phenomena is unclear. In this study, we focus on the effects of cerebellar cortical stimulation on the responses of midline neurons of the lumbosacral spinal cord to graded nonnoxious and noxious visceral (colorectal distension) as well as somatic (brush, pressure, pinch) stimuli. Extracellular recording was used for the isolation and recordi...

Pain features centrally in numerous illnesses and generates enormous public health costs. Despite its ubiquity, the psychological and neurophysiological nature of pain remains controversial. Here, we survey one controversy in particular: the relation between nociceptive pain, which is somatic in origin, and empathic pain, which arises from observing others in pain. First, we review evidence for...

Neuropathic pain is a chronic condition representing a significant burden for patients, society, and healthcare systems. The prevalence of neuropathic pain in the general population has been estimated at 7-8% and is expected to increase in the future. Neuropathic pain differs from nociceptive pain and requires a different therapeutic approach; and the management of neuropathic pain is complicat...

The aim of this study was to assess the in vivo potential of ethanolic extracts of Glycine max (L.) Merr. (SoRiTae) and Rhynchosia nulubilis (Yak-Kong) seeds as natural anti-nociceptive and anti-inflammatory agents. To assess the anti-nociceptive and anti-inflammatory potential, the ethanolic extracts of SoRiTae and Yak-Kong seeds were tested in arachidonic acid-induced ear edema, carrageenan i...

Wang Y1, Zhang Y, Wang W, Cao Y, Han JS. Effects of synchronous or asynchronous electroacupuncture stimulation with low versus high frequency on spinal opioid release and tail flick nociception. Exp Neurol. 2005 Mar;192(1):156-62. Electroacupuncture stimulation (EAS) is known to change brain neurotransmitter release. In the present study, we investigated the effects of synchronous or asynchrono...

This study was designed to examine the effect of emotion on the nociceptive flexion reflex and pain ratings. To do so, 28 participants viewed pictures varying in emotional valence (unpleasant, neutral, pleasant) and electric stimulations were delivered during and in between pictures. Biceps femoris EMG resulting from the stimulations was used to quantify the nociceptive flexion reflex (spinal n...

OBJECTIVES This study was conducted to clarify the analgesic effect of toad cake and toad-cake-containing herbal drugs. METHODS We counted the writhing response of mice after the intraperitoneal administration of acetic acid as a nociceptive pain model and the withdrawal response after the plantar surface stimulation of the hind paw induced by partial sciatic nerve ligation of the mice as a n...

The effects of systemic and local injections of gabapentin, a novel anticonvulsant agent, were tested on nociceptive behaviors in mice with acute herpetic pain. Transdermal infection with herpes simplex virus type-1 (HSV-1) produced nociceptive hypersensitivity of the infected hind paw to innocuous (allodynia) and noxious mechanical stimulation (hyperalgesia) with von Frey filaments. Systemic a...