Hand digit control in children: motor overflow in multi-finger pressing force vector space during maximum voluntary force production

Experimental Brain Research
Jae Kun ShimMarcio Alves de Oliveira

Abstract

The aim of this study was to investigate the contralateral motor overflow in children during single-finger and multi-finger maximum force production tasks. Forty-five right handed children, 5-11 years of age produced maximum isometric pressing force in flexion or extension with single fingers or all four fingers of their right hand. The forces produced by individual fingers of the right and left hands were recorded and analyzed in four-dimensional finger force vector space. The results showed that increases in task (right) hand finger forces were linearly associated with non-task (left) hand finger forces. The ratio of the non-task hand finger force magnitude to the corresponding task hand finger force magnitude, termed motor overflow magnitude (MOM), was greater in extension than flexion. The index finger flexion task showed the smallest MOM values. The similarity between the directions of task hand and non-task hand finger force vectors in four-dimensional finger force vector space, termed motor overflow direction (MOD), was the greatest for index and smallest for little finger tasks. MOM of a four-finger task was greater than the sum of MOMs of single-finger tasks, and this phenomenon was termed motor overflow surplus. Contr...Continue Reading

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Citations

May 20, 2009·Experimental Brain Research·Chang Kook KimJae Kun Shim
Jan 18, 2013·Neural Plasticity·Naoyuki TakeuchiShin-Ichi Izumi
Jun 14, 2013·Journal of Hand Therapy : Official Journal of the American Society of Hand Therapists·Na Jin Seo
May 3, 2011·Behavioural Brain Research·Lisette J van der Knaap, Ineke J M van der Ham
Jun 10, 2009·Parkinsonism & Related Disorders·Oraporn SitburanaJoseph Jankovic
Nov 25, 2011·Medicine and Science in Sports and Exercise·Yi-Ching ChenIng-Shiou Hwang
Sep 17, 2021·Motor Control·Valters Abolins, Mark L Latash

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