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Differences in Muscle Activity Patterns and Graphical Product Quality in Children With Graphomotor Impairment

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ClinicalTrials.gov Identifier: NCT02501590
Recruitment Status : Completed
First Posted : July 17, 2015
Results First Posted : August 7, 2017
Last Update Posted : April 30, 2019
Sponsor:
Information provided by (Responsible Party):
Aviva Mimouni-Bloch, Loewenstein Hospital

Tracking Information
First Submitted Date July 8, 2015
First Posted Date July 17, 2015
Results First Submitted Date March 9, 2017
Results First Posted Date August 7, 2017
Last Update Posted Date April 30, 2019
Study Start Date June 2015
Actual Primary Completion Date October 2016   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures
 (submitted: April 27, 2017)
Normilized Muscle Activity [ Time Frame: day1 ]
The maximal voluntary contraction (MVC) value for each muscle will be computed as the average of three peaks of the surface electromyography (sEMG) data, which differed by no more than 10% from one another. The mean root mean square (RMS) values of the sEMG data will be normalized by the MVC value for each muscle so that the value is presented by percentage.
Original Primary Outcome Measures
 (submitted: July 15, 2015)
  • Muscle Activity Patterns [ Time Frame: day1 ]
    The MVC value for each muscle will be computed as the average of three peaks of the sEMG data, which differed by no more than 10% from one another. The mean root mean square (RMS) values of the sEMG data will be normalized by the MVC value for each muscle. Also, frequency analysis will be performed on the EMG data collected during paths trailing, separately for each inclination. Median power frequency (MDF) will be computed following short-time Fourier transform (STFT) spectrogram calculation using a Hanning sliding 500ms window. Fatigue is associated with a compression of the power spectral density of the EMG towards the lower frequencies, so that a decrease in MDF corresponds to an increase in fatigue
  • copying task shape quality mean error [ Time Frame: day 1 ]
    As the tablet only records when the stylus touches the tablet, movement start and end will be determined from the first and last time the stylus touched the tablet. The movement time will be computed as the amount of time the stylus contacted the surface of the tablet. For each of the four copying tasks, the closest ideal curve was found, defined as the having the same shape as the prototype being copied, but potentially with a different scale and location (relative to the bounding box). This ideal curve was found by minimizing the sum of the squared distance between the curve drawn and a parameterized version of the shape. The minimization was achieved using the simplex algorithm. Mean error is defined as the mean squared distance between the drawn shape and the ideal shape
  • copying task shape quality scale [ Time Frame: day 1 ]
    As the tablet only records when the stylus touches the tablet, movement start and end will be determined from the first and last time the stylus touched the tablet. The movement time will be computed as the amount of time the stylus contacted the surface of the tablet. For each of the four copying tasks, the closest ideal curve was found, defined as the having the same shape as the prototype being copied, but potentially with a different scale and location (relative to the bounding box). This ideal curve was found by minimizing the sum of the squared distance between the curve drawn and a parameterized version of the shape. The minimization was achieved using the simplex algorithm. Scale measure was defined as the difference in scale between the ideal shape and the prototype (1=same size);
  • copying task shape quality shift [ Time Frame: day 1 ]
    As the tablet only records when the stylus touches the tablet, movement start and end will be determined from the first and last time the stylus touched the tablet. The movement time will be computed as the amount of time the stylus contacted the surface of the tablet. For each of the four copying tasks, the closest ideal curve was found, defined as the having the same shape as the prototype being copied, but potentially with a different scale and location (relative to the bounding box). This ideal curve was found by minimizing the sum of the squared distance between the curve drawn and a parameterized version of the shape. The minimization was achieved using the simplex algorithm. shift was defined as the distance in location between the ideal shape and the prototype.
  • path tracing [ Time Frame: day 1 ]
    For the path tracing task, the percentage of time inside or on the lines and outside the lines will be calculated, as well as the shortest distance from a center line.
Change History
Current Secondary Outcome Measures Not Provided
Original Secondary Outcome Measures Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title Differences in Muscle Activity Patterns and Graphical Product Quality in Children With Graphomotor Impairment
Official Title Differences in Muscle Activity Patterns and Graphical Product Quality in Children With Graphomotor Impairment Copying and Tracing Activities on Horizontal or Vertical Surfaces
Brief Summary

Drawing on a vertical surface, rather than horizontal (such as blackboard) is often used by occupational therapists as a way of developing fine motor control and visual motor integration in children. In healthy children no difference in graphical quality was shown between drawing on vertical or horizontal surfaces. However, this was not investigated in children with graphomotor impairments.

The goal of this study is to determine whether movements produced on a vertical surface differ in their performance level and muscle activation patterns compared to movements produced on a horizontal surface. The investigators predict that there would be a difference in the level of performance between the two surfaces.

Detailed Description

Drawing on a vertical surface, such as a blackboard (rather than a horizontal surface) is often used by occupational therapists as a way of developing fine motor control and visual motor integration in children. While there is anecdotal evidence to support this intervention, preliminary results in healthy children showed no differences in graphical quality while drawing on vertical or horizontal surfaces. This however was not investigated in children with graphomotor impairments.

The goal of this study is to determine whether movements produced on a vertical surface differ in their performance level and muscle activation patterns compared to movements produced on a horizontal surface.

The investigators predict that the level of performance on the vertical surface will exceed the level of performance on the horizontal surface. Additionally, the investigators hypothesize that the proximal muscles will be more activated and fatigued (in longer tasks) while drawing on the vertical surface, while the distal muscle will be more activated and fatigued while drawing on the horizontal surface.

Study Type Observational
Study Design Observational Model: Case-Control
Time Perspective: Cross-Sectional
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Non-Probability Sample
Study Population A total of Forty five 4-6 years old children, referred to occupational therapy
Condition Graphomotor Impairment
Intervention Not Provided
Study Groups/Cohorts
  • study

    After the parents sign an informed consent form, they will fill out a demographic questionnaire. Than if the Beery VMI test was not yet administered, it would be performed, as well as the Developmental Coordination Disorder Questionnaire (DCD-Q). Surface electromyography electrodes will be placed on the Upper Trapezius, Extensor Carpi Radialis, and Biceps brachii of the child's dominant hand.

    The subject will perform 4 copying tasks and 2 tracing tasks on a tablet placed once on a horizontal surface (while sitting) and once on a vertical surface (while standing).

  • control

    After the parents sign an informed consent form, they will fill out a demographic questionnaire. Than if the Beery VMI test was not yet administered, it would be performed, as well as the Developmental Coordination Disorder Questionnaire (DCD-Q). Surface electromyography electrodes will be placed on the Upper Trapezius, Extensor Carpi Radialis, and Biceps brachii of the child's dominant hand.

    The subject will perform 4 copying tasks and 2 tracing tasks on a tablet placed once on a horizontal surface (while sitting) and once on a vertical surface (while standing).

Publications *

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status Completed
Actual Enrollment
 (submitted: April 27, 2017)
48
Original Estimated Enrollment
 (submitted: July 15, 2015)
45
Actual Study Completion Date October 2016
Actual Primary Completion Date October 2016   (Final data collection date for primary outcome measure)
Eligibility Criteria

Study group Inclusion criteria:

  • Up to 50 percentile in the long form Beery-Buktenica Developmental Test of Visual-Motor Integration (Beery VMI).

Exclusion Criteria:

  • children in special education,
  • any orthopedic or neurologic impairment,
  • visual impairment that could not be corrected with glasses, or
  • ability to understand and follow simple instructions, reported by the parents.
Sex/Gender
Sexes Eligible for Study: All
Ages 4 Years to 6 Years   (Child)
Accepts Healthy Volunteers Yes
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries Israel
Removed Location Countries  
 
Administrative Information
NCT Number NCT02501590
Other Study ID Numbers 22-14-LOE
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Responsible Party Aviva Mimouni-Bloch, Loewenstein Hospital
Study Sponsor Loewenstein Hospital
Collaborators Not Provided
Investigators
Principal Investigator: Aviva Mimouni-Bloch, M.D Clalit Health Services
PRS Account Loewenstein Hospital
Verification Date April 2019