Monitoring and Analyzing Group Interactions in Asynchronous Discussions with the DIAS System

A number of online tools can now be used in courses for group interactions. This article focuses specifically on asynchronous discussion software that allows one-onone and one-to-many interaction, still predominantly text based and independent of time. It remains a useful communication tool because online classes commonly have learners checking in at different times or from different time zones. This discussion tool offers great opportunity to faculty if thought of as “the classroom space,” and skilled facilitation by faculty in these spaces encourages community and interaction not only among class members, but also with content (Bedard-Voorhees, 2005; Dawley, 2007).

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Aberrant Sensorimotor Integration in Musicians' Cramp Patients

Journal of Psychophysiology ◽

10.1027/0269-8803.17.4.195 ◽

2003 ◽

Vol 17 (4) ◽

pp. 195-202 ◽

Cited By ~ 3

Author(s):

Vanessa K. Lim ◽

John L. Bradshaw ◽

Michael E.R. Nicholls ◽

Ian J. Kirk ◽

Jeff P. Hamm ◽

...

Keyword(s):

Movement Disorder ◽

Sensorimotor Cortex ◽

Sensorimotor Integration ◽

Group Interaction ◽

Focal Dystonia ◽

The Other ◽

Alpha Power ◽

Significant Group ◽

Group Interactions

AbstractSimple tapping and complex movements (Luria finger apposition task) were performed unimanually and bimanually by two groups of professional guitarists while EEG was recorded from electrodes over the sensorimotor cortex. One group had a task-specific movement disorder (focal dystonia or musicians' cramp), while the other group did not (controls). There were no significant group interactions in the task-related power (TRPow) within the alpha range of 8-10Hz (mu1). In contrast, there was a significant group interaction within the alpha range of 10-12Hz (mu2); these latter frequencies are associated with task-specific sensorimotor integration. The significant group interaction included task (simple and complex) by hand (left, right, and both) by electrodes (10 electrodes over the sensorimotor areas). In the rest conditions, the alpha power (10-12Hz) was comparable between the groups; during movement, however, compared to the controls, patients demonstrated the greatest TRPow (10-12Hz) over all conditions. This was particularly evident when patients used their affected hand and suggests that patients with musicians' cramp have impaired task-specific sensorimotor integration.

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