Degraded EEG decoding of wrist movements in absence of kinaesthetic feedback

Galán, Ferran; Baker, Mark R.; Alter, Kai; Baker, Stuart N.

doi:10.1002/hbm.22653

Cited by 30 publications

(22 citation statements)

References 63 publications

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“…Therefore, it is unlikely that neural activity of other cortical areas like neck region affects decoding procedure. In addition, unlike EEG based studies that have proved the effect of somatosensory feedbacks on decoding 24 , using the intracortical techniques with higher spatial resolution can diminish the effect of sensory inputs (muscle spindles or Golgi tendons) in the force decoding. However, this impact cannot be completely ignored due to the projection of proprioceptive information to the motor cortex 25 .…”

Section: Discussionmentioning

confidence: 99%

Continuous Force Decoding from Local Field Potentials of the Primary Motor Cortex in Freely Moving Rats

Khorasani

Beni

Shalchyan

et al. 2016

Sci Rep

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Local field potential (LFP) signals recorded by intracortical microelectrodes implanted in primary motor cortex can be used as a high informative input for decoding of motor functions. Recent studies show that different kinematic parameters such as position and velocity can be inferred from multiple LFP signals as precisely as spiking activities, however, continuous decoding of the force magnitude from the LFP signals in freely moving animals has remained an open problem. Here, we trained three rats to press a force sensor for getting a drop of water as a reward. A 16-channel micro-wire array was implanted in the primary motor cortex of each trained rat, and obtained LFP signals were used for decoding of the continuous values recorded by the force sensor. Average coefficient of correlation and the coefficient of determination between decoded and actual force signals were r = 0.66 and R2 = 0.42, respectively. We found that LFP signal on gamma frequency bands (30–120 Hz) had the most contribution in the trained decoding model. This study suggests the feasibility of using low number of LFP channels for the continuous force decoding in freely moving animals resembling BMI systems in real life applications.

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Section: Discussionmentioning

confidence: 99%

Continuous Force Decoding from Local Field Potentials of the Primary Motor Cortex in Freely Moving Rats

Khorasani

Beni

Shalchyan

et al. 2016

Sci Rep

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“…In the general population, fMRI studies have shown activation of a distributed frontoparietal occipital network during motor planning, imagery, and execution [35,36,51]. EEG source analysis has shown that physical suppression of the kinaesthetic reafference reduces the source activity at pre and postcentral sites and that the same occurs during imagined movements in which the sensory reafference is absent [52]. In highs, the lack of sensory information could be replaced by its mental image owing to their stronger functional equivalence between imagery and action [27,29].…”

Section: Hypnotizability and Motor Imagerymentioning

confidence: 99%

Imagined and Actual Movements with and without Suggestions for anesthesia in Subjects with Different Hypnotizability

Ruggirello¹,

Santarcangelo²,

Sebastiani³

2019

obm icm

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Background: Hypnotizability is a psychophysiological trait associated with several differences including the level of functional equivalence (FE) between imagery and perception, i.e., the similarity of the cortical activations and network configurations associated with each of them. FE is stronger in high hypnotizability individuals (highs) than low hypnotizable participants (lows). In this framework, this study investigates the correlation between electroencephalogram (EEG) of imagined arm/hand movements (MI) and of actual movements performed in the absence of suggestions (M) and in the presence of suggestions of arm/hand anesthesia (MA) in highs and lows. Methods: The EEG alpha (8-12 Hz) and beta (13-25 Hz) absolute power, classically associated with movement preparation and execution, were studied in 18 highs and 17 lows classified according to the Stanford Hypnotic Susceptibility Scale, form A. EEG was recorded during M, MI, and MA. The subjective reports of imagery and the duration of movements were also studied. Results: The duration of movements did not differ between highs and lows. Highs reported better imagery during MI, greater perceived influence of the suggestion of anesthesia during MA, and lower cognitive efforts than lows for both tasks. In line with earlier studies, the spectral analysis did not reveal significant restructuring of the cortical activity during tasks in highs, whereas lows showed cortical changes during MI and MA indicating that they were able to mentally simulate movements and to accept suggestions for anesthesia during voluntary movement, despite their low hypnotizability scores. Conclusions: The present study indicates that unusual psychophysiological characteristics can differ in the response of individuals to suggestions.

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“…As the muscle contracts, the sensory neurons reporting its status reduce their firing rates. Normally, response neurons that directly generate movement require proprioceptive sensory inputs to be able to do so [Galán et al, 2015]. Without proprioceptive inputs, the abrain can learn to activate motor neurons adaptively via a different modality (e.g., vision), but this requires extensive training [Cole and Paillard, 1995].…”

Section: The Innate Response Networkmentioning

confidence: 99%

The Brain, Explained: A Comprehensive Theory of Brain Function

Rappoport¹

2018

Preprint

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Understanding brain function is one of the most important problems in human history. At present, there is no concrete theory for how the brain works. Here, a theory is presented that provides a detailed mechanistic biological account of the brain's capacities, including motor control, functional states, language, and thinking. Brain function is managed by a well-defined r e sponse ( R ) p r ocess t h at i s generally similar to the process underlying the immune system. The R process is strongly reflected in the brain's anatomy, physiology, and external i n teractions. Different R process stages are supported by distinct excitatory networks located in different cortical layers, hippocampal fields, and bagal ganglia paths, by distinct coordination networks comprised of GABAergic interneurons, and by distinct molecular agents. The roles of norepinephrine, serotonin, dopamine and acetylcholine is to promote the alert, planning, goal-setting and execution R process modes, respectively. Opioids and oxytocin promote termination by success, failure, fight o r r un, w hile g lucocorticoids and cannabinoids suppress acute responses to protect cells. The R process has two instances occurring at different time scales. The millisecondscale Quax process implements the execution of hierarchical sequences of movements and thoughts, in which the selection of the next action is determined via interaction between top-down predictions and sensory inputs. The slower Need process controls the satisfaction of internal and external needs. The theory differs from the existing standard accounts in many of the major topics (e.g., the basal ganglia, dopamine, language), and shows how cognition results from biological processes.

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Degraded EEG decoding of wrist movements in absence of kinaesthetic feedback

Cited by 30 publications

References 63 publications

Continuous Force Decoding from Local Field Potentials of the Primary Motor Cortex in Freely Moving Rats

Continuous Force Decoding from Local Field Potentials of the Primary Motor Cortex in Freely Moving Rats

Imagined and Actual Movements with and without Suggestions for anesthesia in Subjects with Different Hypnotizability

The Brain, Explained: A Comprehensive Theory of Brain Function

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