The brain uses efference copy information to optimise spatial memory

González, Claudia Cristina Ortega; Burke, Melanie Rose

doi:10.1007/s00221-012-3298-y

Cited by 9 publications

(7 citation statements)

References 28 publications

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“…It allows us to perform complex and precise operations, correct for errors, and quickly adapt to unexpected changes in our environment [1]–[2]. These processes can be fairly complex since the representation of most of our actions and goals comprises several aspects.…”

Section: Introductionmentioning

confidence: 99%

Differential Effects of Motor Efference Copies and Proprioceptive Information on Response Evaluation Processes

Stock

Wascher²,

Beste

2013

PLoS ONE

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It is well-kown that sensory information influences the way we execute motor responses. However, less is known about if and how sensory and motor information are integrated in the subsequent process of response evaluation. We used a modified Simon Task to investigate how these streams of information are integrated in response evaluation processes, applying an in-depth neurophysiological analysis of event-related potentials (ERPs), time-frequency decomposition and sLORETA. The results show that response evaluation processes are differentially modulated by afferent proprioceptive information and efference copies. While the influence of proprioceptive information is mediated via oscillations in different frequency bands, efference copy based information about the motor execution is specifically mediated via oscillations in the theta frequency band. Stages of visual perception and attention were not modulated by the interaction of proprioception and motor efference copies. Brain areas modulated by the interactive effects of proprioceptive and efference copy based information included the middle frontal gyrus and the supplementary motor area (SMA), suggesting that these areas integrate sensory information for the purpose of response evaluation. The results show how motor response evaluation processes are modulated by information about both the execution and the location of a response.

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Section: Introductionmentioning

confidence: 99%

Differential Effects of Motor Efference Copies and Proprioceptive Information on Response Evaluation Processes

Stock

Wascher²,

Beste

2013

PLoS ONE

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“…In the case of vocal pitch regulation, errors heard in auditory feedback may be detected by comparing the auditory re-afference with a sensory memory trace of the vocal target, with perceived discrepancies eliciting a corrective motor command to regulate the vocal production 23 . Working memory functions to integrate incoming information with stored information in existing memory 24 , and it has been suggested that information related to the speech motor command and sensory re-afference can be stored in short-term memory within a feedback circuit and recalled when needed to adjust the motor activity 25 26 . On the other hand, activation of the brain’s error detection system is affected by characteristics of the working memory system 27 , and the error detection mechanisms can benefit from training of working memory, as evidenced by increased amplitudes of the error-related negativity (ERN) using electroencephalography (EEG) for participants who received a training of auditory, visual, and cross-modality working memory skills using the CogniFit Personal Coach Program 28 .…”

mentioning

confidence: 99%

Training of Working Memory Impacts Neural Processing of Vocal Pitch Regulation

Liu

Guo

Jones

et al. 2015

Sci Rep

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Working memory training can improve the performance of tasks that were not trained. Whether auditory-motor integration for voice control can benefit from working memory training, however, remains unclear. The present event-related potential (ERP) study examined the impact of working memory training on the auditory-motor processing of vocal pitch. Trained participants underwent adaptive working memory training using a digit span backwards paradigm, while control participants did not receive any training. Before and after training, both trained and control participants were exposed to frequency-altered auditory feedback while producing vocalizations. After training, trained participants exhibited significantly decreased N1 amplitudes and increased P2 amplitudes in response to pitch errors in voice auditory feedback. In addition, there was a significant positive correlation between the degree of improvement in working memory capacity and the post-pre difference in P2 amplitudes. Training-related changes in the vocal compensation, however, were not observed. There was no systematic change in either vocal or cortical responses for control participants. These findings provide evidence that working memory training impacts the cortical processing of feedback errors in vocal pitch regulation. This enhanced cortical processing may be the result of increased neural efficiency in the detection of pitch errors between the intended and actual feedback.

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“…Accurate reaching may also arise from proprioceptive eye signals (Enright 1995;Gonzalez and Burke 2013;Henriques et al 2002;Lazzari et al 1997;Ren et al 2006). In our experiment, reaches were made in a dark room, but we did not explicitly remove visual feedback of hand position during the reach.…”

Section: Discussionmentioning

confidence: 99%

Multiple spatial representations interact to increase reach accuracy when coordinating a saccade with a reach

Vázquez

Federici

Pesaran

2017

Journal of Neurophysiology

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Reaching is an essential behavior that allows primates to interact with the environment. Precise reaching to visual targets depends on our ability to localize and foveate the target. Despite this, how the saccade system contributes to improvements in reach accuracy remains poorly understood. To assess spatial contributions of eye movements to reach accuracy, we performed a series of behavioral psychophysics experiments in nonhuman primates (). We found that a coordinated saccade with a reach to a remembered target location increases reach accuracy without target foveation. The improvement in reach accuracy was similar to that obtained when the subject had visual information about the location of the current target in the visual periphery and executed the reach while maintaining central fixation. Moreover, we found that the increase in reach accuracy elicited by a coordinated movement involved a spatial coupling mechanism between the saccade and reach movements. We observed significant correlations between the saccade and reach errors for coordinated movements. In contrast, when the eye and arm movements were made to targets in different spatial locations, the magnitude of the error and the degree of correlation between the saccade and reach direction were determined by the spatial location of the eye and the hand targets. Hence, we propose that coordinated movements improve reach accuracy without target foveation due to spatial coupling between the reach and saccade systems. Spatial coupling could arise from a neural mechanism for coordinated visual behavior that involves interacting spatial representations. How visual spatial representations guiding reach movements involve coordinated saccadic eye movements is unknown. Temporal coupling between the reach and saccade system during coordinated movements improves reach performance. However, the role of spatial coupling is unclear. Using behavioral psychophysics, we found that spatial coupling increases reach accuracy in addition to temporal coupling and visual acuity. These results suggest that a spatial mechanism to couple the reach and saccade systems increases the accuracy of coordinated movements.

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The brain uses efference copy information to optimise spatial memory

Cited by 9 publications

References 28 publications

Differential Effects of Motor Efference Copies and Proprioceptive Information on Response Evaluation Processes

Differential Effects of Motor Efference Copies and Proprioceptive Information on Response Evaluation Processes

Training of Working Memory Impacts Neural Processing of Vocal Pitch Regulation

Multiple spatial representations interact to increase reach accuracy when coordinating a saccade with a reach

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