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Unmyelinated tactile afferents have opposite effects on insular and somatosensory cortical processing.
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- Olausson, Håkan, 1965 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering,Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation
- Cole, Jonathan (author)
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- Vallbo, Åke, 1933 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi,Institute of Neuroscience and Physiology, Department of Physiology
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- McGlone, Francis (author)
- Bushnell, M Catherine (author)
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- (creator_code:org_t)
- Elsevier BV, 2008
- 2008
- English.
- In: Neuroscience letters. - : Elsevier BV. - 0304-3940. ; 436:2, s. 128-32
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A previous functional magnetic resonance imaging (fMRI) study of an A-beta deafferented subject (GL) showed that stimulation of tactile C afferents (CT) activates insular cortex whereas no activation was seen in somatosensory cortices. Psychophysical studies suggested that CT afferents contribute to affective but not to discriminative aspects of tactile stimulation. We have now examined cortical processing following CT stimulation in a second similarly deafferented subject (IW), as well as revisited the data from GL. The results in IW showed similar activation of posterior insular cortex following CT stimulation as in GL and so strengthen the view that CT afferents underpin emotional aspects of touch. In addition, CT stimulation evoked significant fMRI deactivation in somatosensory cortex in both subjects supporting the notion that CT is not a system for discriminative touch.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Neurologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Neurology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
Keyword
- Afferent Pathways
- physiology
- Brain Mapping
- Cerebral Cortex
- blood supply
- physiology
- Emotions
- physiology
- Female
- Gyrus Cinguli
- blood supply
- physiology
- Humans
- Image Processing
- Computer-Assisted
- methods
- Magnetic Resonance Imaging
- methods
- Male
- Middle Aged
- Nerve Fibers
- Unmyelinated
- physiology
- Oxygen
- blood
- Physical Stimulation
- methods
- Psychophysics
- Somatosensory Cortex
Publication and Content Type
- ref (subject category)
- art (subject category)
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