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Somatosensory system

About: Somatosensory system is a research topic. Over the lifetime, 6371 publications have been published within this topic receiving 316900 citations.


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Journal ArticleDOI
TL;DR: This prediction is accurate when tactile stimuli are self-produced relative to when they are externally produced, and is therefore used to attenuate the somatosensory response to the former type of tactile stimulation but not the former, and supports the proposal that the cerebellum is involved in predicting the sensory consequences of movements.

190 citations

Journal ArticleDOI
TL;DR: A human functional magnetic resonance imaging study in which shape and texture perception were contrasted using haptic stimuli presented to the right hand, and visual stimuli presented centrally corroborates and elaborates previous suggestions of specialized visuo‐haptic processing of texture and shape.
Abstract: Previous functional neuroimaging studies have described shape-selectivity for haptic stimuli in many cerebral cortical regions, of which some are also visually shape-selective. However, the literature is equivocal on the existence of haptic or visuo-haptic texture-selectivity. We report here on a human functional magnetic resonance imaging (fMRI) study in which shape and texture perception were contrasted using haptic stimuli presented to the right hand, and visual stimuli presented centrally. Bilateral selectivity for shape, with overlap between modalities, was found in a dorsal set of parietal areas: the postcentral sulcus and anterior, posterior and ventral parts of the intraparietal sulcus (IPS); as well as ventrally in the lateral occipital complex. The magnitude of visually- and haptically-evoked activity was significantly correlated across subjects in the left posterior IPS and right lateral occipital complex, suggesting that these areas specifically house representations of object shape. Haptic shape-selectivity was also found in the left postcentral gyrus, the left lingual gyrus, and a number of frontal cortical sites. Haptic texture-selectivity was found in ventral somatosensory areas: the parietal operculum and posterior insula bilaterally, as well as in the right medial occipital cortex, overlapping with a medial occipital cortical region, which was texture-selective for visual stimuli. The present report corroborates and elaborates previous suggestions of specialized visuo-haptic processing of texture and shape.

190 citations

Journal ArticleDOI
TL;DR: It is demonstrated in humans, through a combination of psychophysical assessment of two-point discrimination thresholds and functional magnetic resonance imaging (fMRI), that brief periods of 5 Hz rTMS evoke lasting perceptual and cortical changes.
Abstract: Repetitive transcranial magnetic stimulation (rTMS) is increasingly used to investigate mechanisms of brain functions and plasticity, but also as a promising new therapeutic tool. The effects of rTMS depend on the intensity and frequency of stimulation and consist of changes of cortical excitability, which often persists several minutes after termination of rTMS. While these findings imply that cortical processing can be altered by applying current pulses from outside the brain, little is known about how rTMS persistently affects learning and perception. Here we demonstrate in humans, through a combination of psychophysical assessment of two-point discrimination thresholds and functional magnetic resonance imaging (fMRI), that brief periods of 5 Hz rTMS evoke lasting perceptual and cortical changes. rTMS was applied over the cortical representation of the right index finger of primary somatosensory cortex, resulting in a lowering of discrimination thresholds of the right index finger. fMRI revealed an enlargement of the right index finger representation in primary somatosensory cortex that was linearly correlated with the individual rTMS-induced perceptual improvement indicative of a close link between cortical and perceptual changes. The results demonstrate that repetitive, unattended stimulation from outside the brain, combined with a lack of behavioral information, are effective in driving persistent improvement of the perception of touch. The underlying properties and processes that allow cortical networks, after being modified through TMS pulses, to reach new organized stable states that mediate better performance remain to be clarified.

190 citations

Journal ArticleDOI
TL;DR: The anatomical, physiological and behavioral changes that take place in response to injury-induced plasticity after damage to the dorsal column pathway in rats and monkeys are discussed and functional collateral sprouting has been promoted by the post-lesion digestion of the perineuronal net in the cuneate nucleus.

189 citations

Book
01 Jan 1978
TL;DR: The basic concepts in General Sensory Physiology and Psychophysics are outlined, as well as factors that Affect Pain Pain Therapy, and the Qualities and Components of Pain.
Abstract: 1 General Sensory Physiology, Psychophysics- 11 Basic Concepts in General Sensory Physiology- 12 Relation Between Stimulus and Behavior Conditioned Reflex- 13 Measurement of the Intensity of Sensations Psychophysics- 14 Spatial, Temporal, and Affective Aspects of Sensation- 2 Somatovisceral Sensibility- 21 Mechanoreception- 22 Proprioception- 23 Thermoreception- 24 Visceral Sensibility- 3 Neurophysiology of Sensory Systems- 31 Transformations of Stimuli in Receptors- 32 Sensory Functions of the CNS - a Survey- 33 Properties and Operation of Sensory Neurons and Aggregates of Neurons- 34 The Somatosensory System: Spinal Cord, Ascending Pathways, and Brain Stem- 35 The Somatosensory System in Thalamus and Cortex- 36 The Sensory System in the Light of Information Theory- 4 Nociception and Pain- 41 The Qualities and Components of Pain- 42 Neurophysiology and Psychophysics of Pain- 43 Pathophysiology of Pain Special and Abnormal Forms of Pain- 44 Factors that Affect Pain Pain Therapy- 5 Physiology of Vision- 51 The Eye- 52 Psychophysics of Visual Perception- 53 Neurophysiology of Vision- 54 Eye Movements and Sensorimotor Integration in Vision- 6 Physiology of Hearing- 61 Anatomy of the Ear- 62 Auditory Performance- 63 Functions of the Middle and Inner Ears- 64 The Auditory Nerve and the Higher Stations of the Auditory Pathway- 7 Physiology of the Sense of Equilibrium- 71 Anatomy and Physiology of the Peripheral Organ- 72 Central Nervous Basis of the Sense of Equilibrium- 8 Physiology of Taste- 81 Morphology of the Organs of Taste Subjective Taste Physiology- 82 Objective Taste Physiology- 9 Physiology of Olfaction- 91 The Olfactory Mucosa Peripheral Mechanisms of Olfactory Reception- 92 Subjective Olfactory Physiology Central Connections- 10 Thirst and Hunger: General Sensations- 101 Thirst- 102 Hunger- 11 Suggested Reading- 12 Answer Key- 13 Subject Index

189 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023463
2022986
2021238
2020233
2019234