Adaptive flexibility of the within-hand attentional gradient in touch: An MEG study

Kida, Tetsuo; Tanaka, Emi; Kakigi, Ryusuke

doi:10.1016/j.neuroimage.2018.06.063

Cited by 7 publications

(8 citation statements)

References 83 publications

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“…2017 ). Researching the interaction between attention and somatotopic processing of digits is important to understand the neural basis of S1 ( Kida et al. 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Population Receptive Field Characteristics in the between- and Within-Digit Dimensions of the Undominant Hand in the Primary Somatosensory Cortex

et al. 2021

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Somatotopy is an important guiding principle for sensory fiber organization in the primary somatosensory cortex (S1), which reflects tactile information processing and is associated with disease-related reorganization. However, it is difficult to measure the neuronal encoding scheme in S1 in vivo in normal participants. Here, we investigated the somatotopic map of the undominant hand using a Bayesian population receptive field (pRF) model. The model was established in hand space with between- and within-digit dimensions. In the between-digit dimension, orderly representation was found, which had low variability across participants. The pRF shape tended to be elliptical for digits with high spatial acuity, for which the long axis was along the within-digit dimension. In addition, the pRF width showed different change trends in the 2 dimensions across digits. These results provide new insights into the neural mechanisms in S1, allowing for in-depth investigation of somatosensory information processing and disease-related reorganization.

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“…2017 ). Researching the interaction between attention and somatotopic processing of digits is important to understand the neural basis of S1 ( Kida et al. 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Population Receptive Field Characteristics in the between- and Within-Digit Dimensions of the Undominant Hand in the Primary Somatosensory Cortex

et al. 2021

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“…Second, we adopted well-defined tasks that properly attempted to control for and standardize top-down effects related to task/attentional set across participants. We considered this important because the activity of the primary somatosensory cortex can be modulated by the relevance of stimuli to behavior, but also fingertip representations can be shaped by task/attentional set (Braun et al, 2002;Lipton et al, 2010;Kida et al, 2018). A dramatic impact of task requirements on the BOLD-activity in the contralateral S1 was evident in this study when comparing activity evoked during the visual thresholdtracking task and the tactile tasks.…”

Section: Strengths Of the Present Studymentioning

confidence: 84%

Disinhibition of Human Primary Somatosensory Cortex After Median Nerve Transection and Reinnervation

Nordmark

Johansson

2020

Front. Hum. Neurosci.

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Despite state-of-the-art surgical and postoperative treatment, median nerve transection causes lasting impaired hand function due to limitations in the nerve's reinnervation ability. The defective innervation and thus controllability of the affected hand can shape the brain's control of manual behaviors. Earlier studies of changes in the processing of tactile stimuli have focused mainly on stimulation of the reinnervated hand and lack sufficient control over the brain's use of the tactile input in perceptual terms. Here we used fMRI to measure brain activity (BOLD-signal) in 11 people with median nerve injury and healthy controls (N = 11) when performing demanding tactile tasks using the tip of either the index or little finger of either hand. For the nerve-injured group, the left median nerve had been traumatically transected in the distal forearm and surgically repaired on average 8 years before the study. The hand representation of their contralesional (right) primary somatosensory cortex (S1) showed greater activity compared to controls when the left reinnervated index finger was used, but also when the left-hand little finger and the fingers of the right hand innervated by uninjured nerves were used. We argue that the overall increase in activity reflects a general disinhibition of contralesional S1 consistent with an augmented functional reorganizational plasticity being an ongoing feature of chronic recovery from nerve injury. Also, the nerve-injured showed increased activity within three prefrontal cortical areas implicated in higher-level behavioral processing (dorsal anterior cingulate cortex, left ventrolateral prefrontal and right dorsolateral prefrontal cortex), suggesting that processes supporting decisionmaking and response-selection were computationally more demanding due to the compromised tactile sensibility.

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“…The minimum sample size for the present study was determined using G*power software (version 3.1) from partial η-squared as was determined in a previous study [31]. The effect size was fixed at 0.35.…”

Section: Participantsmentioning

confidence: 99%

“…It is possible that the participants may have increased attentional allocation to the movement site and reduced attentional allocation to the stimulation site to achieve high motor performance. Indeed, it has been shown that attentional modulation is affected by the distance between the stimulation site and site of attention [30] and that cortical responses are greater when stimuli are presented to the attentive finger compared to the non-attentive finger [31]. Alternatively, waveforms may be altered by simple summation.…”

Section: Introductionmentioning

confidence: 99%

Event-Related Brain Potentials N140 and P300 during Somatosensory Go/NoGo Tasks Are Modulated by Movement Preparation

Matsuda,

Sugawara,

Akaiwa

et al. 2023

Brain Sciences

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The Go/NoGo task requires attention and sensory processing to distinguish a motor action cue or ‘Go stimulus’ from a ‘NoGo stimulus’ requiring no action, as well as motor preparation for a rapid Go stimulus response. The neural activity mediating these response phases can be examined non-invasively by measuring specific event-related brain potentials (ERPs) using electroencephalography. However, it is critical to determine how different task conditions, such as the relationship between attention site and movement site, influence ERPs and task performance. In this study, we compared attention-associated ERP components N140 and P300, the performance metrics reaction time (RT) and accuracy (%Error) and movement-related cortical potentials (MRCPs) between Go/NoGo task trials in which attention target and movement site were the same (right index finger movement in response to right index finger stimulation) or different (right index finger movement in response to fifth finger stimulation). In other Count trials, participants kept a running count of target stimuli presented but did not initiate a motor response. The N140 amplitudes at electrode site Cz were significantly larger in Movement trials than in Count trials regardless of the stimulation site–movement site condition. In contrast, the P300 amplitude at Cz was significantly smaller in Movement trials than in Count trials. The temporal windows of N140 and P300 overlapped with the MRCP. This superposition may influence N140 and P300 through summation, possibly independent of changes in attentional allocation.

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Adaptive flexibility of the within-hand attentional gradient in touch: An MEG study

Cited by 7 publications

References 83 publications

Population Receptive Field Characteristics in the between- and Within-Digit Dimensions of the Undominant Hand in the Primary Somatosensory Cortex

Population Receptive Field Characteristics in the between- and Within-Digit Dimensions of the Undominant Hand in the Primary Somatosensory Cortex

Disinhibition of Human Primary Somatosensory Cortex After Median Nerve Transection and Reinnervation

Event-Related Brain Potentials N140 and P300 during Somatosensory Go/NoGo Tasks Are Modulated by Movement Preparation

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