Negative cortical d.c. shifts associated with coordination and control in a prehensile force task

Matthew P. Rearick, Semyon M. Slobounov

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Movement-related cortical d.c. shifts accompanying the execution of four different prehensile tasks were investigated using six normal adult subjects. The goal was to identify patterns of brain electrical activity that differentiated a precision grip configuration (thumb and index finger or 2f) from a full precision grip configuration (thumb and all fingers or 5f) at different total force levels. As such, this was the first study to systematically manipulate both grip configuration and force level while also measuring movement-related potentials (MRP) during the control phase of an isometric prehensile task. This investigation focused on assessing the sustained, performance-related negativity (N-P) associated with the execution of particular grip configurations at different total force levels (percentage maximum voluntary force, MVF). The results from this study demonstrated significant interactions between grip configuration, force level and amplitude of the N-P. First, an overall increase in force output does not correspond to larger N-P amplitudes under these task conditions. Second, force level and grip configuration interact significantly in determining the peak N-P, especially in low-force conditions. Overall, the findings reveal a task-specific sensitivity of movement-related potentials associated with the control phase of a prehensile force task while humans execute different grip configurations and force levels.

Original languageEnglish (US)
Pages (from-to)195-202
Number of pages8
JournalExperimental Brain Research
Volume132
Issue number2
DOIs
StatePublished - Jan 1 2000

Fingerprint

Hand Strength
Advisory Committees
Thumb
Fingers
Brain

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

@article{de2bd57654704ed59cba5ebe7941d249,
title = "Negative cortical d.c. shifts associated with coordination and control in a prehensile force task",
abstract = "Movement-related cortical d.c. shifts accompanying the execution of four different prehensile tasks were investigated using six normal adult subjects. The goal was to identify patterns of brain electrical activity that differentiated a precision grip configuration (thumb and index finger or 2f) from a full precision grip configuration (thumb and all fingers or 5f) at different total force levels. As such, this was the first study to systematically manipulate both grip configuration and force level while also measuring movement-related potentials (MRP) during the control phase of an isometric prehensile task. This investigation focused on assessing the sustained, performance-related negativity (N-P) associated with the execution of particular grip configurations at different total force levels (percentage maximum voluntary force, MVF). The results from this study demonstrated significant interactions between grip configuration, force level and amplitude of the N-P. First, an overall increase in force output does not correspond to larger N-P amplitudes under these task conditions. Second, force level and grip configuration interact significantly in determining the peak N-P, especially in low-force conditions. Overall, the findings reveal a task-specific sensitivity of movement-related potentials associated with the control phase of a prehensile force task while humans execute different grip configurations and force levels.",
author = "Rearick, {Matthew P.} and Slobounov, {Semyon M.}",
year = "2000",
month = "1",
day = "1",
doi = "10.1007/s002210000338",
language = "English (US)",
volume = "132",
pages = "195--202",
journal = "Experimental Brain Research",
issn = "0014-4819",
publisher = "Springer Verlag",
number = "2",

}

Negative cortical d.c. shifts associated with coordination and control in a prehensile force task. / Rearick, Matthew P.; Slobounov, Semyon M.

In: Experimental Brain Research, Vol. 132, No. 2, 01.01.2000, p. 195-202.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Negative cortical d.c. shifts associated with coordination and control in a prehensile force task

AU - Rearick, Matthew P.

AU - Slobounov, Semyon M.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - Movement-related cortical d.c. shifts accompanying the execution of four different prehensile tasks were investigated using six normal adult subjects. The goal was to identify patterns of brain electrical activity that differentiated a precision grip configuration (thumb and index finger or 2f) from a full precision grip configuration (thumb and all fingers or 5f) at different total force levels. As such, this was the first study to systematically manipulate both grip configuration and force level while also measuring movement-related potentials (MRP) during the control phase of an isometric prehensile task. This investigation focused on assessing the sustained, performance-related negativity (N-P) associated with the execution of particular grip configurations at different total force levels (percentage maximum voluntary force, MVF). The results from this study demonstrated significant interactions between grip configuration, force level and amplitude of the N-P. First, an overall increase in force output does not correspond to larger N-P amplitudes under these task conditions. Second, force level and grip configuration interact significantly in determining the peak N-P, especially in low-force conditions. Overall, the findings reveal a task-specific sensitivity of movement-related potentials associated with the control phase of a prehensile force task while humans execute different grip configurations and force levels.

AB - Movement-related cortical d.c. shifts accompanying the execution of four different prehensile tasks were investigated using six normal adult subjects. The goal was to identify patterns of brain electrical activity that differentiated a precision grip configuration (thumb and index finger or 2f) from a full precision grip configuration (thumb and all fingers or 5f) at different total force levels. As such, this was the first study to systematically manipulate both grip configuration and force level while also measuring movement-related potentials (MRP) during the control phase of an isometric prehensile task. This investigation focused on assessing the sustained, performance-related negativity (N-P) associated with the execution of particular grip configurations at different total force levels (percentage maximum voluntary force, MVF). The results from this study demonstrated significant interactions between grip configuration, force level and amplitude of the N-P. First, an overall increase in force output does not correspond to larger N-P amplitudes under these task conditions. Second, force level and grip configuration interact significantly in determining the peak N-P, especially in low-force conditions. Overall, the findings reveal a task-specific sensitivity of movement-related potentials associated with the control phase of a prehensile force task while humans execute different grip configurations and force levels.

UR - http://www.scopus.com/inward/record.url?scp=0034102708&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034102708&partnerID=8YFLogxK

U2 - 10.1007/s002210000338

DO - 10.1007/s002210000338

M3 - Article

C2 - 10853944

AN - SCOPUS:0034102708

VL - 132

SP - 195

EP - 202

JO - Experimental Brain Research

JF - Experimental Brain Research

SN - 0014-4819

IS - 2

ER -