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Differences in Early Stages of Tactile ERP Temporal Sequence (P100) in Cortical Organization during Passive Tactile Stimulation in Children with Blindness and Controls.

Ortiz Alonso T, Santos JM, Ortiz Terán L, Borrego Hernández M, Poch Broto J, de Erausquin GA - PLoS ONE (2015)

Bottom Line: On the other hand, they are equally proficient in recognizing stimuli with semantic content (letters).The last observation is consistent with the role of P100 on somatosensory-based recognition of complex forms.The cortical differences between seeing control and blind groups, during spatial tactile discrimination, are associated with activation in visual pathway (occipital) and task-related association (temporal and frontal) areas.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychiatry, Facultad de Medicina, Universidad Complutense, Madrid, Spain.

ABSTRACT
Compared to their seeing counterparts, people with blindness have a greater tactile capacity. Differences in the physiology of object recognition between people with blindness and seeing people have been well documented, but not when tactile stimuli require semantic processing. We used a passive vibrotactile device to focus on the differences in spatial brain processing evaluated with event related potentials (ERP) in children with blindness (n = 12) vs. normally seeing children (n = 12), when learning a simple spatial task (lines with different orientations) or a task involving recognition of letters, to describe the early stages of its temporal sequence (from 80 to 220 msec) and to search for evidence of multi-modal cortical organization. We analysed the P100 of the ERP. Children with blindness showed earlier latencies for cognitive (perceptual) event related potentials, shorter reaction times, and (paradoxically) worse ability to identify the spatial direction of the stimulus. On the other hand, they are equally proficient in recognizing stimuli with semantic content (letters). The last observation is consistent with the role of P100 on somatosensory-based recognition of complex forms. The cortical differences between seeing control and blind groups, during spatial tactile discrimination, are associated with activation in visual pathway (occipital) and task-related association (temporal and frontal) areas. The present results show that early processing of tactile stimulation conveying cross modal information differs in children with blindness or with normal vision.

No MeSH data available.


Related in: MedlinePlus

Grand average of Event Related Potentials in children with blindness (thick line) and their seeing counterparts (thin lines) following presentation of non-target stimuli on the line orientation (panel a) and letter recognition (panel b) tasks.The time frames for analysis of the P100 component were determined by searching for the maximal amplitude in the respective time window at the Pz electrode between 80–220 ms.
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pone.0124527.g003: Grand average of Event Related Potentials in children with blindness (thick line) and their seeing counterparts (thin lines) following presentation of non-target stimuli on the line orientation (panel a) and letter recognition (panel b) tasks.The time frames for analysis of the P100 component were determined by searching for the maximal amplitude in the respective time window at the Pz electrode between 80–220 ms.

Mentions: Fig 3 describes the temporal evolution of the somatosensory evoked potential. In response to tactile lines (Fig 3, panel a) and letters (Fig 3, panel b) stimuli, the cerebral evoked potentials in both groups were associated with the first positive wave (P100) of the event related potential. The configurations of these waves were similar for the cerebral responses in children with blindness and in the seeing controls.


Differences in Early Stages of Tactile ERP Temporal Sequence (P100) in Cortical Organization during Passive Tactile Stimulation in Children with Blindness and Controls.

Ortiz Alonso T, Santos JM, Ortiz Terán L, Borrego Hernández M, Poch Broto J, de Erausquin GA - PLoS ONE (2015)

Grand average of Event Related Potentials in children with blindness (thick line) and their seeing counterparts (thin lines) following presentation of non-target stimuli on the line orientation (panel a) and letter recognition (panel b) tasks.The time frames for analysis of the P100 component were determined by searching for the maximal amplitude in the respective time window at the Pz electrode between 80–220 ms.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4520520&req=5

pone.0124527.g003: Grand average of Event Related Potentials in children with blindness (thick line) and their seeing counterparts (thin lines) following presentation of non-target stimuli on the line orientation (panel a) and letter recognition (panel b) tasks.The time frames for analysis of the P100 component were determined by searching for the maximal amplitude in the respective time window at the Pz electrode between 80–220 ms.
Mentions: Fig 3 describes the temporal evolution of the somatosensory evoked potential. In response to tactile lines (Fig 3, panel a) and letters (Fig 3, panel b) stimuli, the cerebral evoked potentials in both groups were associated with the first positive wave (P100) of the event related potential. The configurations of these waves were similar for the cerebral responses in children with blindness and in the seeing controls.

Bottom Line: On the other hand, they are equally proficient in recognizing stimuli with semantic content (letters).The last observation is consistent with the role of P100 on somatosensory-based recognition of complex forms.The cortical differences between seeing control and blind groups, during spatial tactile discrimination, are associated with activation in visual pathway (occipital) and task-related association (temporal and frontal) areas.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychiatry, Facultad de Medicina, Universidad Complutense, Madrid, Spain.

ABSTRACT
Compared to their seeing counterparts, people with blindness have a greater tactile capacity. Differences in the physiology of object recognition between people with blindness and seeing people have been well documented, but not when tactile stimuli require semantic processing. We used a passive vibrotactile device to focus on the differences in spatial brain processing evaluated with event related potentials (ERP) in children with blindness (n = 12) vs. normally seeing children (n = 12), when learning a simple spatial task (lines with different orientations) or a task involving recognition of letters, to describe the early stages of its temporal sequence (from 80 to 220 msec) and to search for evidence of multi-modal cortical organization. We analysed the P100 of the ERP. Children with blindness showed earlier latencies for cognitive (perceptual) event related potentials, shorter reaction times, and (paradoxically) worse ability to identify the spatial direction of the stimulus. On the other hand, they are equally proficient in recognizing stimuli with semantic content (letters). The last observation is consistent with the role of P100 on somatosensory-based recognition of complex forms. The cortical differences between seeing control and blind groups, during spatial tactile discrimination, are associated with activation in visual pathway (occipital) and task-related association (temporal and frontal) areas. The present results show that early processing of tactile stimulation conveying cross modal information differs in children with blindness or with normal vision.

No MeSH data available.


Related in: MedlinePlus