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- Alstermark, Bror, et al.
(författare)
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Motor command for precision grip in the macaque monkey can be mediated by spinal interneurons
- 2011
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Ingår i: Journal of Neurophysiology. - : American Physiological Society. - 0022-3077 .- 1522-1598. ; 106:1, s. 122-126
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Tidskriftsartikel (refereegranskat)abstract
- In motor control, the general view is still that spinal interneurons mainly contribute to reflexes and automatic movements. The question raised here is whether spinal interneurons can mediate the cortical command for independent finger movements, like a precision grip between the thumb and index finger in the macaque monkey, or if this function depends exclusively on a direct corticomotoneuronal pathway. This study is a followup of a previous report (Sasaki et al. J Neurophysiol 92: 3142-3147, 2004) in which we trained macaque monkeys to pick a small piece of sweet potato from a cylinder by a precision grip between the index finger and thumb. We have now isolated one spinal interneuronal system, the C3-C4 propriospinal interneurons with projection to hand and arm motoneurons. In the previous study, the lateral corticospinal tract (CST) was interrupted in C4/C5 (input intact to the C3-C4 propriospinal interneurons), and in this study, the CST was interrupted in C2 (input abolished). The precision grip could be performed within the first 15 days after a CST lesion in C4/C5 but not in C2. We conclude that C3-C4 propriospinal interneurons also can carry the command for precision grip.
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- Goggins, S., et al.
(författare)
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Computer-Supported Collaborative Learning at Work : CSCL@Work - Bridging Learning and Work
- 2013
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Ingår i: CSCL 2013 conference proceedings volume 2. ; , s. 436-440
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Konferensbidrag (refereegranskat)abstract
- We created an interdisciplinary workshop to explore principles of computer-supported collaborative learning in work settings. The workshop's theme was, simply CSCL at work. Our first workshop at ACM Group 2010, the 2 nd at ACM Group 2012, and the resulting book, raise an important set of issues and potentials for research, but does not solve the thorny and controversial issues. This workshop wanted to make progress on the identified issues. The CSCL@Work workshop was a half-day workshop devoted to sharing innovative approaches and discussing solutions aimed at understanding studying and designing 'learning at work' supported by digital/mobile technologies. We selected the CSCL conference as an ideal venue for a workshop on this topic because the North American and European communities who participate in the Learning Sciences include leading members of the international CSCL communities. The workshops at ACM group focused more on CSCW whereas this proposed workshop on CSCL2013 included CSCL researchers. It started with contextualizing the current situation. Then, participant questions and proposed solutions aimed at the issues we have raised and begun to recognize. We focused on working groups, an approach, which supports knowledge building. To participate in the workshop, discussants was asked for a position paper of up to 2 pages in standard CSCL conference format. Our edited book was made available to participants in advance, and selected authors provided overviews of their work and perspective in an interleaved way with the more action oriented working sessions.
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