Oscillatory activity reflects differential use of spatial reference frames by sighted and blind individuals in tactile attention

Schubert, Jonathan T. W.; Buchholz, Verena N.; Föcker, Julia; Engel, Andreas K.; Röder, Brigitte; Heed, Tobias

doi:10.1016/j.neuroimage.2015.05.068

Cited by 30 publications

(74 citation statements)

References 56 publications

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“…The posterior parietal cortex (PPC) has been hypothesized to play a crucial role in implementing such operation in SC 35 and this region has been repetitively shown reorganized in EB 36–39 . The role of the PPC in touch localization is partially supported by an electroencephalographic study showing that the detection of deviant tactile stimuli at the hand induced event-related potentials that varied in crossed when compared to uncrossed condition of posture in sighted subjects, whereas changing the posture of the hand had no influence on the early blind subjects’ brain activity 40,41 .…”

Section: Discussionmentioning

confidence: 99%

How visual experience impacts the internal and external spatial mapping of sensorimotor functions

Crollen

Albouy

Leporé

et al. 2017

Sci Rep

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Tactile perception and motor production share the use of internally- and externally-defined coordinates. In order to examine how visual experience affects the internal/external coding of space for touch and movement, early blind (EB) and sighted controls (SC) took part in two experiments. In experiment 1, participants were required to perform a Temporal Order Judgment task (TOJ), either with their hands in parallel or crossed over the body midline. Confirming previous demonstration, crossing the hands led to a significant decrement in performance in SC but did not affect EB. In experiment 2, participants were trained to perform a sequence of five-finger movements. They were tested on their ability to produce, with the same hand but with the keypad turned upside down, the learned (internal) or the mirror (external) sequence. We observed significant transfer of motor sequence knowledge in both EB and SC irrespective of whether the representation of the sequence was internal or external. Together, these results demonstrate that visual experience differentially impacts the automatic weight attributed to internal versus external coordinates depending on task-specific spatial requirements.

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Section: Discussionmentioning

confidence: 99%

How visual experience impacts the internal and external spatial mapping of sensorimotor functions

Crollen

Albouy

Leporé

et al. 2017

Sci Rep

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“…For this analysis, we re-coded channel topography relative to the anatomical site of stimulation. We flipped EEG channels for trials in which the left hand had been stimulated with respect to left and right (Buchholz et al, 2011;Schubert et al, 2015). This procedure effectively codes EEG signals as if all stimuli had occurred at the right hand, allowing us to pool trials across Anatomical Side of Touch to increase statistical power.…”

Section: Deconvolution Modelsmentioning

confidence: 99%

“…Indeed, alpha-band lateralization can reflect both somatotopic and external coding. Over somatosensory areas, alpha-band suppression depends on which hand is attended or stimulated, independent of posture (Buchholz et al, 2011(Buchholz et al, , 2013Schubert et al, 2015Schubert et al, , 2018. In contrast, over occipito-parietal areas, alpha-band suppression depends on posture, suggestive of coding in external coordinates (Schubert et al, 2015(Schubert et al, , 2018.…”

Section: Introductionmentioning

confidence: 97%

“…Yet, whereas estimates for the time requirements of tactile remapping range from 150-300 ms (Yamamoto and Kitazawa, 2001;Azañón and Soto-Faraco, 2008;Overvliet et al, 2011;Brandes and Heed, 2015) alphaband modulation has been demonstrated in tasks that implement long delays of >1s between attentional cue and tactile stimulus, or between tactile stimulus and response. During these delays, alpha-band suppression often develops gradually and is strongest at the end (Buchholz et al, 2011(Buchholz et al, , 2013van Ede et al, 2011van Ede et al, , 2014Bauer et al, 2012;Schubert et al, 2015). This time course may imply that alpha-band modulation reflects processes that result from, rather than cause, tactile-spatial transformation.…”

Section: Introductionmentioning

confidence: 99%

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Spatially modulated alpha-band activity does not mediate tactile remapping and fast overt orienting behavior

König

Heed

2019

Preprint

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Posterior oscillatory alpha-band activity is commonly associated with spatial-attentional orienting and prioritization across sensory modalities. It has also been suggested to mediate the automatic transformation of tactile stimuli from a skin-based, somatotopic reference frame into an external one. Previous research has not convincingly separated these two possible roles of alpha-band activity. In particular, the use of delay paradigms, implemented to allow temporal evolution of segregable oscillatory brain responses to stimulus, motor planning, and response, have prohibited strong conclusions about a causal role of oscillatory activity in tactile-spatial transformations. Here, we assessed alpha-band modulation with massive univariate deconvolution, an analysis approach that disentangles brain signals overlapping in time and space. Thirty-one participants performed a delay-free, visual serialsearch task in which saccade behavior was unrestricted. A tactile cue to uncrossed or crossed hands was either informative or uninformative about visual target location. Alpha-band suppression following tactile stimulation was lateralized relative to the stimulated hand over centro-parietal sensors, but relative to its external location over parieto-occipital sensors. Alpha-band suppression reflected external touch location only after informative cues, challenging the proposition that posterior alpha-band lateralization indexes automatic tactile transformation. Moreover, alphaband suppression occurred ~200 ms later than externally directed saccade responses after tactile stimulation. These findings suggest that alpha-band activity does not play a causal role in tactilespatial transformation but, instead, reflects delayed, supramodal processes of attentional reorienting.

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“…Various studies have shown these oscillations to be associated with activity of the visual cortex, thalamus and insula (Feige et al, 2005;Goldman et al, 2002;Larson et al, 1998;Sadato et al, 1998), although their nature and significance remain to be elucidated. Furthermore, reduced parieto-occipital alpha power has been reported in blind individuals during cognitive tasks (Kober et al, 2014;Kriegseis et al, 2006;Schubert et al, 2015), possibly reflecting alterations in the thalamocortical pathway (lateral geniculate nucleus and primary visual cortex; Cecchetti et al, 2016;Kupers and Ptito, 2014).…”

Section: Introductionmentioning

confidence: 99%

Sleep structure in blindness is influenced by circadian desynchrony

Aubin

Jennum

Nielsen

et al. 2017

Journal of Sleep Research

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SUMMARYWe examined the structure, duration and quality of sleep, including nonrapid eye movement sleep and rapid eye movement sleep, in 11 blind individuals without conscious light perception and 11 age-and sexmatched sighted controls. Because blindness is associated with a greater incidence of free-running circadian rhythms, we controlled for circadian phase by a measure of melatonin onset timing. When circadian rhythm was entrained and melatonin onset occurred at normal times, sleep structure did not differ between blind and sighted individuals. On the other hand, an abnormal timing of the circadian phase, including delayed, shifted and unclassifiable melatonin onsets, led to larger rapid eye movement sleep latencies and increased wake times. No differences were observed for stages of non-rapid eye movement sleep, either between congenital and late blind and sighted individuals, or across the different circadian phases. Moreover, abnormal circadian phases were more common in the blind (n = 5) than the sighted (n = 2) sample. Our findings suggest that the sleep structure of blind individuals depends on entrainment of circadian phase, rather than on the absence of vision.

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Oscillatory activity reflects differential use of spatial reference frames by sighted and blind individuals in tactile attention

Cited by 30 publications

References 56 publications

How visual experience impacts the internal and external spatial mapping of sensorimotor functions

How visual experience impacts the internal and external spatial mapping of sensorimotor functions

Spatially modulated alpha-band activity does not mediate tactile remapping and fast overt orienting behavior

Sleep structure in blindness is influenced by circadian desynchrony

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