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1.1 1 xml info:srw/schema/1/mods-v3.2 Differences in Muscle Activity Patterns and Graphical Product Quality in Children Copying and Tracing Activities on Horizontal or Vertical Surfaces Portnoy S author Rosenberg L author Alazraki T author Elyakim E author Friedman J author 2015 The observation that a given task, e.g. producing a signature, looks similar when created by different motor commands and different muscles groups is known as motor equivalence. Relatively little data exists regarding the characteristics of motor equivalence in children. In this study, we compared the level of performance when performing a tracing task and copying figures in two common postures: while sitting at a desk and while standing in front of a wall, among preschool children. In addition, we compared muscle activity patterns in both postures. Specifically, we compared the movements of 35 five- to six-year old children, recording the same movements of copying figures and path tracing on an electronic tablet in both a horizontal orientation, while sitting, and a vertical orientation, while standing. Different muscle activation patterns were observed between the postures, however no significant difference in the performance level was found, providing evidence of motor equivalence at this young age. The study presents a straightforward method of assessing motor equivalence that can be extended to other stages of development as well as motor disorders. Motor equivalence Electromyography Tablet Occupational Therapy Muscle fatigue Motor control exported from refbase (https://refbase.nfshost.com/show.php?record=77), last updated on Tue, 26 Jul 2016 06:56:51 +0000 text http://linkinghub.elsevier.com/retrieve/pii/S1050641115000309 https://refbase.nfshost.com/files/portnoy/2015/77_Portnoy_etal2015.pdf http://linkinghub.elsevier.com/retrieve/pii/S1050641115000309 10.1016/j.jelekin.2015.01.011 Portnoy_etal2015 Journal of Electromyography and Kinesiology Journal of Electromyography and Kinesiology 2015 continuing periodical academic journal 25 3 540�547 1050-6411 1