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A concept for extending the applicability of constraint-induced movement therapy through motor cortex activity feedback using a neural prosthesis.

Ward TE, Soraghan CJ, Matthews F, Markham C - Comput Intell Neurosci (2007)

Bottom Line: This may provide a possible avenue for extending CIMT to patients hitherto excluded as a result of severity of condition.In support of such a paradigm, this paper details the current status of CIMT and related attempts to extend rehabilitation therapy through the application of technology.An introduction to the relevant haemodynamics is given including a description of the basic technology behind a suitable NIRS system.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronic Engineering, National University of Ireland, Maynooth, County Kildare, Ireland. tomas.ward@eeng.nuim.ie

ABSTRACT
This paper describes a concept for the extension of constraint-induced movement therapy (CIMT) through the use of feedback of primary motor cortex activity. CIMT requires residual movement to act as a source of feedback to the patient, thus preventing its application to those with no perceptible movement. It is proposed in this paper that it is possible to provide feedback of the motor cortex effort to the patient by measurement with near infrared spectroscopy (NIRS). Significant changes in such effort may be used to drive rehabilitative robotic actuators, for example. This may provide a possible avenue for extending CIMT to patients hitherto excluded as a result of severity of condition. In support of such a paradigm, this paper details the current status of CIMT and related attempts to extend rehabilitation therapy through the application of technology. An introduction to the relevant haemodynamics is given including a description of the basic technology behind a suitable NIRS system. An illustration of the proposed therapy is described using a simple NIRS system driving a robotic arm during simple upper-limb unilateral isometric contraction exercises with healthy subjects.

No MeSH data available.


Related in: MedlinePlus

Top rowshows average Hb (dashed trace) and HbO (solid trace) levels SD for subject 2. The bottom row shows averagereadings for subject 1. The left-hand column shows activity during motor task(between vertical dashed lines) while the right-hand column shows correspondingactivity during rest. The abscissa for all plots is in seconds.
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fig4: Top rowshows average Hb (dashed trace) and HbO (solid trace) levels SD for subject 2. The bottom row shows averagereadings for subject 1. The left-hand column shows activity during motor task(between vertical dashed lines) while the right-hand column shows correspondingactivity during rest. The abscissa for all plots is in seconds.

Mentions: Table 2 presents the results of the experiment asdescribed. This table shows the percentage of time that subjects were able tomove the robot during the motor activation task. All the subjects weresuccessful in achieving some control of the robotic arm. For example, subject 1was able to activate the robot almost all the time when engaged in rightforearm movement (>95%).Subject 3 unfortunately was not as successful as the others, only realisingmovement of the robot arm just over 60% of the time (a footnote to the tablemay suggest why). However, the measures presented here are rather conservativeas they indicate the percentage of time by which the threshold was exceededduring the motor task. If the results were reworked to indicate the percentageof motor task periods where the robotic arm was activated, then the resultswould be almost perfect. This of course would be a disingenuous summary of theexperiment for many reasons. A more insightful observation of the experimentscan be obtained from Figure 4 which shows the averaged responses (includingstandard deviations) for two paradigmatic subject tests during both the motortask and rest periods.


A concept for extending the applicability of constraint-induced movement therapy through motor cortex activity feedback using a neural prosthesis.

Ward TE, Soraghan CJ, Matthews F, Markham C - Comput Intell Neurosci (2007)

Top rowshows average Hb (dashed trace) and HbO (solid trace) levels SD for subject 2. The bottom row shows averagereadings for subject 1. The left-hand column shows activity during motor task(between vertical dashed lines) while the right-hand column shows correspondingactivity during rest. The abscissa for all plots is in seconds.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2266825&req=5

fig4: Top rowshows average Hb (dashed trace) and HbO (solid trace) levels SD for subject 2. The bottom row shows averagereadings for subject 1. The left-hand column shows activity during motor task(between vertical dashed lines) while the right-hand column shows correspondingactivity during rest. The abscissa for all plots is in seconds.
Mentions: Table 2 presents the results of the experiment asdescribed. This table shows the percentage of time that subjects were able tomove the robot during the motor activation task. All the subjects weresuccessful in achieving some control of the robotic arm. For example, subject 1was able to activate the robot almost all the time when engaged in rightforearm movement (>95%).Subject 3 unfortunately was not as successful as the others, only realisingmovement of the robot arm just over 60% of the time (a footnote to the tablemay suggest why). However, the measures presented here are rather conservativeas they indicate the percentage of time by which the threshold was exceededduring the motor task. If the results were reworked to indicate the percentageof motor task periods where the robotic arm was activated, then the resultswould be almost perfect. This of course would be a disingenuous summary of theexperiment for many reasons. A more insightful observation of the experimentscan be obtained from Figure 4 which shows the averaged responses (includingstandard deviations) for two paradigmatic subject tests during both the motortask and rest periods.

Bottom Line: This may provide a possible avenue for extending CIMT to patients hitherto excluded as a result of severity of condition.In support of such a paradigm, this paper details the current status of CIMT and related attempts to extend rehabilitation therapy through the application of technology.An introduction to the relevant haemodynamics is given including a description of the basic technology behind a suitable NIRS system.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronic Engineering, National University of Ireland, Maynooth, County Kildare, Ireland. tomas.ward@eeng.nuim.ie

ABSTRACT
This paper describes a concept for the extension of constraint-induced movement therapy (CIMT) through the use of feedback of primary motor cortex activity. CIMT requires residual movement to act as a source of feedback to the patient, thus preventing its application to those with no perceptible movement. It is proposed in this paper that it is possible to provide feedback of the motor cortex effort to the patient by measurement with near infrared spectroscopy (NIRS). Significant changes in such effort may be used to drive rehabilitative robotic actuators, for example. This may provide a possible avenue for extending CIMT to patients hitherto excluded as a result of severity of condition. In support of such a paradigm, this paper details the current status of CIMT and related attempts to extend rehabilitation therapy through the application of technology. An introduction to the relevant haemodynamics is given including a description of the basic technology behind a suitable NIRS system. An illustration of the proposed therapy is described using a simple NIRS system driving a robotic arm during simple upper-limb unilateral isometric contraction exercises with healthy subjects.

No MeSH data available.


Related in: MedlinePlus