Effects of visual deprivation on primary motor cortex excitability: a study on healthy subjects based on repetitive transcranial magnetic stimulation

Cambieri, Chiara; Iacovelli, Elisa; Gori, María; Onesti, Emanuela; Ceccanti, Marco; Frasca, Vittorio; Inghilleri, Maurizio

doi:10.1007/s00221-017-4945-0

Cited by 8 publications

(4 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8 ). This hypothesis is supported by a recent paper published by Cambieri et al (2017) showing that the excitability of the motor cortex is the same for EC and EO.…”

Section: Discussionsupporting

confidence: 63%

Electroencephalographic modulations during an open- or closed-eyes motor task

Rimbert

Al-Chwa

Zaepffel³

et al. 2018

PeerJ

View full text Add to dashboard Cite

There is fundamental knowledge that during the resting state cerebral activity recorded by electroencephalography (EEG) is strongly modulated by the eyes-closed condition compared to the eyes-open condition, especially in the occipital lobe. However, little research has demonstrated the influence of the eyes-closed condition on the motor cortex, particularly during a self-paced movement. This prompted the question: How does the motor cortex activity change between the eyes-closed and eyes-open conditions? To answer this question, we recorded EEG signals from 15 voluntary healthy subjects who performed a simple motor task (i.e., a voluntary isometric flexion of the right-hand index) under two conditions: eyes-closed and eyes-open. Our results confirmed strong modulation in the mu rhythm (7–13 Hz) with a large event-related desynchronisation. However, no significant differences have been observed in the beta band (15–30 Hz). Furthermore, evidence suggests that the eyes-closed condition influences the behaviour of subjects. This study gives us greater insight into the motor cortex and could also be useful in the brain-computer interface (BCI) domain.

show abstract

“…8 ). This hypothesis is supported by a recent paper published by Cambieri et al (2017) showing that the excitability of the motor cortex is the same for EC and EO.…”

Section: Discussionsupporting

confidence: 63%

Electroencephalographic modulations during an open- or closed-eyes motor task

Rimbert

Al-Chwa

Zaepffel³

et al. 2018

PeerJ

View full text Add to dashboard Cite

show abstract

“…These results suggest that the mechanism on the motor cortex is different between the two conditions, particularly in EC condition because there was no synchronisation in the mu rhythm but a synchronisation in the beta band ( Figure 8). This hypothesis is supported by a recent paper published by Cambieri et al showing that the excitability of the motor cortex is the same for EC and EO [48].…”

Section: The Number Of Movements Performed Decreases With Eyes-closedsupporting

confidence: 63%

Peer Review #2 of "Electroencephalographic modulations during an open- or closed-eyes motor task (v0.2)"

2018

View full text Add to dashboard Cite

There is fundamental knowledge that during the resting state cerebral activity recorded by electroencephalography (EEG) is strongly modulated by the eyes-closed condition compared to the eyes-open condition especially in the occipital lobe. However, little research has demonstrated the influence of the eyes-closed condition on the motor cortex, particularly during a self-paced movement. This prompted the question: how does the motor cortex activity changes between the eyes-closed and eyes-open conditions. To answer this question, we recorded EEG signals from 15 voluntary healthy subjects who performed a simple motor task (i.e., a voluntary isometric flexion of the right-hand index) under two conditions: eyes-closed and eyes-open. Our results confirmed strong modulation in the mu rhythm (7-13 Hz) with a large event-related desynchronisation. However, no significant differences have been observed in the beta band (15-30 Hz). Furthermore, evidence suggests that the closed-eye condition influences the behaviour of subjects. This study gives us greater insight into the motor cortex and could also be useful in the braincomputer interface (BCI) domain.

show abstract

“…It has been shown that blindfolding leads to increased activation of the visual cortex 43 , 45 , which becomes engaged in processing of non-visual stimuli 36 . We also know that short-term visual deprivation is associated with increased excitability of the motor cortex 46 , 51 ; but see also 47 . These regions are anatomically connected to the posterior parietal cortex, which has the capacity to integrate visual, tactile and proprioceptive information from the upper limb 3 , 12 , 27 , 52 , 53 and tactile and proprioceptive signals from the two hands in the somatic rubber hand illusion 25 .…”

Section: Discussionmentioning

confidence: 99%

“…This finding indicates that blindfolding can, to some extent, produce similar cognitive and perceptual effects as blindness. On a neural level, short-term visual deprivation for 30 to 180 minutes leads to enhanced excitability of visual and motor cortices 43 – 46 ; but see also 47 , while more prolonged visual deprivation on the order of 5 days results in rapid, early plastic changes in the visual cortex 36 . Thus, an interesting question would be if there is any effect of short-term visual deprivation on the subjective feeling of limb ownership and the spatial recalibration of hand position sense in the somatic rubber hand illusion, i.e., if multisensory integration of bodily signals in a common external spatial reference frame would be diminished already after such a short period of visual deprivation.…”

Section: Introductionmentioning

confidence: 99%

Short-term visual deprivation boosts the flexibility of body representation

Radziun

Ehrsson

2018

Sci Rep

View full text Add to dashboard Cite

Short-term visual deprivation by blindfolding influences tactile acuity and orientation in space and, on a neural level, leads to enhanced excitability of visual and motor cortices. However, to the best of our knowledge, the possible effects of short-term visual deprivation on body representation have not been examined. In the present study, we tested two groups of 30 healthy participants with the somatic rubber hand illusion, a well-established paradigm to probe the dynamic plasticity of body representation. Before the start of the procedure, the experimental group was blindfolded for 120 minutes, while the control group wore transparent goggles for the same amount of time. We found that although there was no difference in the subjective feeling of ownership of the rubber hand during the illusion, the blindfolded group showed a significantly larger recalibration of hand position sense towards the location of the rubber hand than the control group. This finding suggests that short-term visual deprivation boosts plasticity of body representation in terms of multisensory spatial recalibration of hand position sense.

show abstract

Effects of visual deprivation on primary motor cortex excitability: a study on healthy subjects based on repetitive transcranial magnetic stimulation

Cited by 8 publications

References 45 publications

Electroencephalographic modulations during an open- or closed-eyes motor task

Electroencephalographic modulations during an open- or closed-eyes motor task

Peer Review #2 of "Electroencephalographic modulations during an open- or closed-eyes motor task (v0.2)"

Short-term visual deprivation boosts the flexibility of body representation

Contact Info

Product

Resources

About