Evidence map›Paper›PMID 24760860›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2014

Motor cortical correlates of arm resting in the context of a reaching task and implications for prosthetic control.

Meel Velliste, Scott D Kennedy, Andrew B Schwartz, Andrew S Whitford, Jeong-Woo Sohn, Angus J C McMorland

Abstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed.

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  15. Neurophysiology and neural engineering: a review.Journal of neurophysiology · 2017
    Review
  16. Article
  17. Interfacing to the brain's motor decisions.Journal of neurophysiology · 2017
    Review
  18. Spatiotemporal Distribution of Location and Object Effects in Primary Motor Cortex Neurons during Reach-to-Grasp.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2016
    Article
  19. Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Meel VellisteSystems Neuroscience Institute, Department of Neurobiology and Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
Scott D Kennedy
Andrew B Schwartz
Andrew S Whitford
Jeong-Woo Sohn
Angus J C McMorland

Funding

Cortical Control of a Dextrous Prosthetic HandR01NS050256 · NINDS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI SCHWARTZ, ANDREW B. · 2006 to 2012
$6.3M
NINDS NIH HHS 5R01NS050256NINDS NIH HHS R01 NS050256
6 · The paper itself

Abstract

Prosthetic devices are being developed to restore movement for motor-impaired individuals. A robotic arm can be controlled based on models that relate motor-cortical ensemble activity to kinematic parameters. The models are typically built and validated on data from structured trial periods during which a subject actively performs specific movements, but real-world prosthetic devices will need to operate correctly during rest periods as well. To develop a model of motor cortical modulation during rest, we trained monkeys (Macaca mulatta) to perform a reaching task with their own arm while recording motor-cortical single-unit activity. When a monkey spontaneously put its arm down to rest between trials, our traditional movement decoder produced a nonzero velocity prediction, which would cause undesired motion when applied to a prosthetic arm. During these rest periods, a marked shift was found in individual units' tuning functions. The activity pattern of the whole population during rest (Idle state) was highly distinct from that during reaching movements (Active state), allowing us to predict arm resting from instantaneous firing rates with 98% accuracy using a simple classifier. By cascading this state classifier and the movement decoder, we were able to predict zero velocity correctly, which would avoid undesired motion in a prosthetic application. Interestingly, firing rates during hold periods followed the Active pattern even though hold kinematics were similar to those during rest with near-zero velocity. These findings expand our concept of motor-cortical function by showing that population activity reflects behavioral context in addition to the direct parameters of the movement itself.

Indexed as

AnimalsArtificial LimbsBiomechanical PhenomenaMacaca mulattaMaleMotor CortexMovementNeuronsPsychomotor Performancearm relaxationbrain-computer interfaceidle statemotor controlmotor cortexresting

Identifiers

PMID24760860
PMCPMC3996218

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.