Inhibitory impact of subliminal electrical finger stimulation on SI representation and perceptual sensitivity of an adjacent finger

@article{Taskin2008InhibitoryIO,
  title={Inhibitory impact of subliminal electrical finger stimulation on SI representation and perceptual sensitivity of an adjacent finger},
  author={B. Taskin and S. Holtze and T. Krause and A. Villringer},
  journal={NeuroImage},
  year={2008},
  volume={39},
  pages={1307-1313}
}
Simultaneous stimulation of two adjacent fingers above sensory perception threshold (supraliminal stimulation) leads to an inhibitory interaction effect on responses in primary somatosensory cortex (SI). Moreover, during electrical finger stimulation closely below threshold for conscious perception (subliminal stimulation) inhibitory interneurons in cortical layer 4 are assumed to be activated preferentially as compared to excitatory interneurons. Using fMRI in humans, here we show that… Expand
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References

SHOWING 1-10 OF 53 REFERENCES
Sub-area-specific Suppressive Interaction in the BOLD responses to simultaneous finger stimulation in human primary somatosensory cortex: evidence for increasing rostral-to-caudal convergence.
TLDR
Findings on differences in the topographic as well as functional organization between sub-areas of SI support the notion of increasing convergence and integration from area 3b to areas 1 and 2 in human subjects. Expand
Representational overlap of adjacent fingers in multiple areas of human primary somatosensory cortex depends on electrical stimulus intensity: an fMRI study
TLDR
fMRI was used to examine the influence of non-painful electrical stimulus intensity on the BOLD response in human primary somatosensory cortex and relative overlap increased significantly from low to high stimulus intensity. Expand
Interactions between inputs from adjacent digits in somatosensory thalamus and cortex of the raccoon
TLDR
The amount of inhibition produced in the cortex was unchanged by Capsaicin treatment, but was reduced in the thalamus compared to control animals, indicating that capsaicin-sensitive peripheral afferents provide a tonic control over interdigit inhibition in theThalamus. Expand
Synaptic potentials evoked by convergent somatosensory and corticocortical inputs in raccoon somatosensory cortex: substrates for plasticity.
TLDR
Testing for topographic and cross-modality convergence in primary somatosensory cortex of raccoon found the representation of glabrous skin of forepaw digits was chosen because, even though it is dominated by inputs from the glabous skin of a single digit, it nevertheless comes to respond to stimulation of other digits when, e.g., a digit is removed. Expand
Ipsilateral Hand Input to Area 3b Revealed by Converging Hemodynamic and Electrophysiological Analyses in Macaque Monkeys
TLDR
These findings confirm bimanual convergence at the earliest stage of cortical somatosensory processing in primates and illustrate the value of combined CSD and fMRI analyses in monkeys for defining hidden aspects of sensory function and for investigating the neuronal processes generating fMRI signals. Expand
The interaction of the somatosensory evoked potentials to simultaneous finger stimuli in the human central nervous system. A study using direct recordings.
TLDR
The results indicate that the interaction of somatosensory impulses occurs in several structures along the sensory pathway in CNS, including the cuneate nucleus, the sensory thalamic nucleus, as well as sensory and motor cortices, with the greatest IRs in the cerebral cortices and the weakest ones in the brain-stem. Expand
fMRI assessment of somatotopy in human Brodmann area 3b by electrical finger stimulation
TLDR
Somatotopic arrangement of the second and fifth finger was found in Brodmann area 3b of the primary somatosensory cortex and additional activated areas were found on the crown of ipsilateral and contralateral post-central gyrus and posterior parietal cortex. Expand
fMRI of the Responses to Vibratory Stimulation of Digit Tips
TLDR
Three studies were carried out to assess the applicability of fMRI at 3.0 T to analysis of vibrotaction in humans and the frequency dependence of the response focused on the effect of an increase in vibrotactile frequency. Expand
Reduction of Excitability (“Inhibition”) in the Ipsilateral Primary Motor Cortex Is Mirrored by fMRI Signal Decreases
TLDR
Phasic low force pinch grip is suggested as a reproducible, easy model of focal inhibition as decreased cortical excitability presents as decreased BOLD signal using fMRI. Expand
Electrophysiological evidence for overlapping dominant and latent inputs to somatosensory cortex in squirrel monkeys.
TLDR
Normal corepresentation of nondominant dorsum hand (radial) inputs with the dominant (median or ulnar) inputs in the glabrous hand surface representation provides a clear vehicle for the biased patterns of reorganization occurring after peripheral nerve section. Expand
...
1
2
3
4
5
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