A finger-pressing position detector for assisting people with developmental disabilities to control their environmental stimulation through fine motor activities with a standard keyboard

2012 ◽  
Vol 33 (5) ◽  
pp. 1360-1365 ◽  
Author(s):  
Ching-Hsiang Shih
2009 ◽  
Vol 106 (2) ◽  
pp. 370-377 ◽  
Author(s):  
Jean-Sébastien Blouin ◽  
Lee D. Walsh ◽  
Peter Nickolls ◽  
Simon C. Gandevia

Control of posture and movement requires control of the output from motoneurons. Motoneurons of human lower limb muscles exhibit sustained, submaximal activity to high-frequency electrical trains, which has been hypothesized to be partly triggered by monosynaptic Ia afferents. The possibility to trigger such behavior in upper limb motoneurons and the potential unique role of Ia afferents to trigger such behavior remain unclear. Subjects ( n = 9) received high-frequency trains of electrical stimuli over biceps brachii and flexor pollicis longus (FPL). We chose to study the FPL muscle because it has weak monosynaptic Ia afferent connectivity and it is involved in fine motor control of the thumb. Two types of stimulus trains (100-Hz bursts and triangular ramps) were tested at five intensities below painful levels. All subjects exhibited enhanced torque in biceps and FPL muscles after both types of high-frequency train. Torques also persisted after stimulation, particularly for the highest stimulus intensity. To separate the evoked torques that resulted from a peripheral mechanism (e.g., muscle potentiation) and that which resulted from a central origin, we studied FPL responses to high-frequency trains after complete combined nerve blocks of the median and radial nerves ( n = 2). During the blocks, high-frequency trains over the FPL did not yield torque enhancements or persisting torques. These results suggest that enhanced contractions of central origin can be elicited in motoneurons innervating the upper limb, despite weak monosynaptic Ia connections for FPL. Their presence in a recently evolved human muscle (FPL) indicates that these enhanced contractions may have a broad role in controlling tonic postural outputs of hand muscles and that they may be available even for fine motor activities involving the thumb.


2003 ◽  
Vol 57 (5) ◽  
pp. 550-557 ◽  
Author(s):  
D. Marr ◽  
S. Cermak ◽  
E. S. Cohn ◽  
A. Henderson

2020 ◽  
Vol 74 (2) ◽  
pp. 7402345010p1 ◽  
Author(s):  
Sierra Caramia ◽  
Amanpreet Gill ◽  
Alisha Ohl ◽  
David Schelly

2021 ◽  
Vol 4 (1) ◽  
pp. 27-42
Author(s):  
Adelisa Salkić ◽  
Milena Nikolić

Perceptual-motor skills (PMS) are very important for the functioning of children in general, including children with developmental disabilities, and enable a person to, based on the stimulus through movement it acts on the space that is surrounded. This paper aims to review the research of enriched knowledge of PMS of children with disabilities, which emphasized the importance of performing activities of everyday life and the acquisition of academic skills. The papers collected a search of electronic databases using the keywords: PMS, children with disabilities, visual perception, gross and fine motor skills, visual-motor coordination, visual-motor integration. Criteria for the selection of papers have been published in full and in the last 10 years. A total of 12 works met the criteria. The results of the research review showed that children with disabilities have a limitation in PMS, and showed that PMS differ separately from the type and degree of difficulty, but differences also exist within the same category of children with disabilities. Implementation of education and rehabilitation programs improves PMS. The results showed that there is a correlation between PMS and activities of everyday life and a correlation between visual perceptions and the acquisition of reading skills. It is important to point out that PMS can be practiced and it is important to implement incentive programs for children with disabilities, but also children at risk for some difficulty, to prevent possible difficulties that children may have in performing daily life activities and in acquiring academic skills. The results of the presented research should be considered concerning the limitations of the presented research, but also to the limitations of this research. Keywords: visual-motor integration, fine and gross motor skills, developmental difficulties


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