Les potentiels corticaux liés au mouvement de l'homme âgé

Fève, A; Bathien, N; Rondot, Pierre

doi:10.1016/s0987-7053(05)80376-4

Cited by 17 publications

(3 citation statements)

References 19 publications

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“…On the other hand, motor cortical potentials that preceded freely-executed voluntary finger or hand movements (lateralized readiness potential or LRP) were reported to increase in aged individuals. Specifically, an increase in the amplitude of response-locked LRPs was indicative of a slowed motor response (Feve et al, 1991;Yordanova et al, 2004;Roggeveen et al, 2007;Cespón et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Age-Dependent Effect of Transcranial Alternating Current Stimulation on Motor Skill Consolidation

Fresnoza

Christova

Bieler

et al. 2020

Front. Aging Neurosci.

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Transcranial alternating current stimulation (tACS) is the application of subthreshold, sinusoidal current to modulate ongoing brain rhythms related to sensory, motor and cognitive processes. Electrophysiological studies suggested that the effect of tACS applied at an alpha frequency (8-12 Hz) was state-dependent. The effects of tACS, that is, an increase in parieto-occipital electroencephalography (EEG) alpha power and magnetoencephalography (MEG) phase coherence, was only observed when the eyes were open (low alpha power) and not when the eyes were closed (high alpha power). This state-dependency of the effects of alpha tACS might extend to the aging brain characterized by general slowing and decrease in spectral power of the alpha rhythm. We additionally hypothesized that tACS will influence the motor cortex, which is involved in motor skill learning and consolidation. A group of young and old healthy adults performed a serial reaction time task (SRTT) with their right hand before and after the tACS stimulation. Each participant underwent three sessions of stimulation: sham, stimulation applied at the individual participant's alpha peak frequency or individual alpha peak frequency (iAPF; α-tACS) and stimulation with iAPF plus 2 Hz (α2-tACS) to the left motor cortex for 10 min (1.5 mA). We measured the effect of stimulation on general motor skill (GMS) and sequence-specific skill (SS) consolidation. We found that α-tACS and α2-tACS improved GMS and SS consolidation in the old group. In contrast, α-tACS minimally improved GMS consolidation but impaired SS consolidation in the young group. On the other hand, α2-tACS was detrimental to the consolidation of both skills in the young group. Our results suggest that individuals with aberrant alpha rhythm such as the elderly could benefit more from tACS stimulation, whereas for young healthy individuals with intact alpha rhythm the stimulation could be detrimental.

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Section: Introductionmentioning

confidence: 99%

Age-Dependent Effect of Transcranial Alternating Current Stimulation on Motor Skill Consolidation

Fresnoza

Christova

Bieler

et al. 2020

Front. Aging Neurosci.

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“…Previous studies showed increased beta activity which is generally attenuated during active motor movements in EEG of older persons (Tucker et al 1990;Polich 1997). Researcher also found delayed latency and altered lateralisation of MRCP that is indicative of motor preparation with ageing (Feve, Bathien, and Rondot 1991;Labyt et al 2004). How these functional changes would influence the formulation and effectiveness of LDA classifiers, however, still needs investigation.…”

Section: Discussionmentioning

confidence: 99%

Predicting numerical data entry errors by classifying EEG signals with linear discriminant analysis

Lin

2014

Behaviour & Information Technology

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Daily numerical data entry is subject to human errors, and errors in numerical data can cause serious losses in health care, safety and finance. Difficulty in detecting errors by human operators in numerical data entry necessitates an early error detection/prediction mechanism to proactively prevent severe accidents. To explore the possibility of using multi-channel electroencephalography (EEG) collected before movements/reactions to detect/predict human errors, linear discriminant analysis (LDA) classifier was utilised to predict numerical typing errors before their occurrence in numerical typing. Single trial EEG data were collected from seven participants during numerical hear-and-type tasks and three temporal features were extracted from six EEG sites in a 150-ms time window. The sensitivity of LDA classifier was revealed by adjusting the critical ratio of two Mahalanobis distances as a classification criterion. On average, the LDA classifier was able to detect 74.34% of numerical typing errors in advance with only 34.46% false alarms, resulting in a sensitivity of 1.05. A cost analysis also showed that using the LDA classifier would be beneficial as long as the penalty is at least 15 times the cost of inspection when the error rate is 5%. LDA demonstrated its realistic potential in detecting/predicting relatively few errors in numerical data without heavy pre-processing. This is one step towards predicting and preventing human errors in perceptual-motor tasks before their occurrence.

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“…The movement we chose was turning a page in a book. As some experimental findings have suggested that the RP could be influenced by the mental activity that precedes a movement, [9][10][11] we used two conditions for triggering the movement. In the first condition, the subject proceeded according to the classical paradigm, i.e., without any external cue for movement onset.…”

mentioning

confidence: 99%

Intracerebral recording of readiness potential induced by a complex motor task

et al. 2001

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While exploring 11 epileptic patients with intracerebral electrodes, we recorded readiness potential (RP) preceding a complex motor task. Multilead depth electrodes were positioned stereotactically into the cortex. In three patients, it was also possible to record RP from the putamen. The movement triggering the recording was the turning of a page in an architectural book. The movement was performed under two conditions: in the first condition, without looking at the pictures on the page (typical self-pacing); and in the second condition, following the inspection of the pictures. There were no significant differences in the appearance of RP under these two conditions, neither in duration nor in amplitude. That could be explained by the fact that "self-paced" does not mean "spontaneous," but covers the internal non-conscious program related to a given task. RP were present in the contralateral primary sensorimotor cortex and the bilateral supplementary motor area (SMA), and in the anterior caudal cingulate cortex. No difference between the cortical topography of RP preceding a simple motor task and the topography of RP occurring in connection with complex movement was observed.

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Les potentiels corticaux liés au mouvement de l'homme âgé

Cited by 17 publications

References 19 publications

Age-Dependent Effect of Transcranial Alternating Current Stimulation on Motor Skill Consolidation

Age-Dependent Effect of Transcranial Alternating Current Stimulation on Motor Skill Consolidation

Predicting numerical data entry errors by classifying EEG signals with linear discriminant analysis

Intracerebral recording of readiness potential induced by a complex motor task

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