Abstract
The aim of the study was to develop a novel approach for quantifying stair-stepping in a trajectory tracking task with the goal of understanding how age and stroke-related differences in motor control contribute to force control deficits. Nine stroke participants, nine age-matched controls, and nine young healthy adults performed an isometric gripping task while squeezing, holding, and releasing a cylindrical device. The visual tracking task involved three different rates of force production (5, 10, and 20% maximal force/s). Four outcome measures determined force control deficits: (a) root mean square error, (b) standard deviation, (c) step number, and (d) mean pause duration. Our findings indicate that step number, and especially mean pause duration, differentiated force control deficits in the three groups more effectively than the traditional root mean square error. Moreover, stroke participants showed the largest force control deficits during the grip release phase compared to age-matched and young healthy controls. Importantly, step number and mean pause duration quantified stair-stepping while measuring different constructs than root mean square error. Distinct step and duration interruptions in force modulation by persons post-stroke during the grip release phase provide new information with implications for motor recovery during rehabilitation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1-15 |
| Number of pages | 15 |
| Journal | Experimental Brain Research |
| Volume | 211 |
| Issue number | 1 |
| DOIs | |
| State | Published - May 1 2011 |
| Externally published | Yes |
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Keywords
- Force control
- Force variability
- Grip
- Hand
- Stroke
- Upper extremity
ASJC Scopus subject areas
- Neuroscience(all)
Cite this
Force control deficits in chronic stroke : Grip formation and release phases. / Naik, Sagar K.; Patten, Carolynn; Lodha, Neha; Coombes, Stephen A.; Cauraugh, James H.
In: Experimental Brain Research, Vol. 211, No. 1, 01.05.2011, p. 1-15.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Force control deficits in chronic stroke
T2 - Grip formation and release phases
AU - Naik, Sagar K.
AU - Patten, Carolynn
AU - Lodha, Neha
AU - Coombes, Stephen A.
AU - Cauraugh, James H.
PY - 2011/5/1
Y1 - 2011/5/1
N2 - The aim of the study was to develop a novel approach for quantifying stair-stepping in a trajectory tracking task with the goal of understanding how age and stroke-related differences in motor control contribute to force control deficits. Nine stroke participants, nine age-matched controls, and nine young healthy adults performed an isometric gripping task while squeezing, holding, and releasing a cylindrical device. The visual tracking task involved three different rates of force production (5, 10, and 20% maximal force/s). Four outcome measures determined force control deficits: (a) root mean square error, (b) standard deviation, (c) step number, and (d) mean pause duration. Our findings indicate that step number, and especially mean pause duration, differentiated force control deficits in the three groups more effectively than the traditional root mean square error. Moreover, stroke participants showed the largest force control deficits during the grip release phase compared to age-matched and young healthy controls. Importantly, step number and mean pause duration quantified stair-stepping while measuring different constructs than root mean square error. Distinct step and duration interruptions in force modulation by persons post-stroke during the grip release phase provide new information with implications for motor recovery during rehabilitation.
AB - The aim of the study was to develop a novel approach for quantifying stair-stepping in a trajectory tracking task with the goal of understanding how age and stroke-related differences in motor control contribute to force control deficits. Nine stroke participants, nine age-matched controls, and nine young healthy adults performed an isometric gripping task while squeezing, holding, and releasing a cylindrical device. The visual tracking task involved three different rates of force production (5, 10, and 20% maximal force/s). Four outcome measures determined force control deficits: (a) root mean square error, (b) standard deviation, (c) step number, and (d) mean pause duration. Our findings indicate that step number, and especially mean pause duration, differentiated force control deficits in the three groups more effectively than the traditional root mean square error. Moreover, stroke participants showed the largest force control deficits during the grip release phase compared to age-matched and young healthy controls. Importantly, step number and mean pause duration quantified stair-stepping while measuring different constructs than root mean square error. Distinct step and duration interruptions in force modulation by persons post-stroke during the grip release phase provide new information with implications for motor recovery during rehabilitation.
KW - Force control
KW - Force variability
KW - Grip
KW - Hand
KW - Stroke
KW - Upper extremity
UR - http://www.scopus.com/inward/record.url?scp=79953042198&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953042198&partnerID=8YFLogxK
U2 - 10.1007/s00221-011-2637-8
DO - 10.1007/s00221-011-2637-8
M3 - Article
C2 - 21448576
AN - SCOPUS:79953042198
VL - 211
SP - 1
EP - 15
JO - Experimental Brain Research
JF - Experimental Brain Research
SN - 0014-4819
IS - 1
ER -