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Little is known about the neuronal mechanisms underlying the temporal ordering of tactile signals. We examined the brain regions involved in judgments of the temporal order of successive taps delivered to both hands. Participants received identical stimuli while engaging in 2 different tasks: Judging the temporal order and judging the numerosity of points(More)
It is generally accepted that the brain can resolve the order of two stimuli that are separated in time by 20-50 ms. This applies to temporal order judgment of two tactile stimuli, delivered one to each hand, as long as the arms are uncrossed. However, crossing the arms caused misreporting (that is, inverting) of the temporal order. The reversal was not due(More)
The capsaicin (vanilloid) receptor, VR1, is a sensory neuron-specific ion channel that serves as a polymodal detector of pain-producing chemical and physical stimuli. It has been proposed that ATP, released from different cell types, initiates the sensation of pain by acting predominantly on nociceptive ionotropic purinoceptors located on sensory nerve(More)
We examined effects of handedness on the judgment of temporal order of successive taps delivered to both hands. When the subjects' arms were uncrossed, the temporal resolution (84% correct responses) of right-handed subjects (52 +/- 4 ms, n = 16) was significantly better than that of left-handed subjects (83 +/- 9 ms, n = 16). When their arms were crossed,(More)
Tetrathiomolybdate (TM), a drug developed for Wilson's disease, produces an anti-angiogenic and anti-inflammatory effect by reducing systemic copper levels. TM therapy has proved effective in inhibiting the growth of tumors in animal tumor models and in cancer patients. We have hypothesized that TM may be used for the therapy of rheumatoid arthritis and(More)
We developed a new method for comparing immunopositive cell densities across groups of animals and creating statistical parametric maps on standardized sections. As an example, we compared Iba-1 (microglial marker) positive cell densities in rats with (n=6) and without (n=6) unilateral injection of 1-methyl-4-phenylpyridinium salt (MPP+). Immunopositive(More)
Adopting an unusual posture can sometimes give rise to paradoxical experiences. For example, the subjective ordering of successive unseen tactile stimuli delivered to the two arms can be affected when people cross them. A growing body of evidence now highlights the role played by the parietal cortex in spatio-temporal information processing when sensory(More)
Altered multisensory integration has been reported in autism; however, little is known concerning how the autistic brain processes spatio-temporal information concerning tactile stimuli. We report a study in which a crossed-hands illusion was investigated in autistic children. Neurotypical individuals often experience a subjective reversal of temporal order(More)
It is generally accepted that the basal ganglia play an important role in interval timing that requires the measurement of temporal durations. By contrast, it remains controversial whether the basal ganglia play an essential role in temporal order judgment (TOJ) of successive stimuli, a behavior that does not necessarily require the measurement of durations(More)