07.01.2013 Views

[Abstract Title]. - Society for Neuroscience

[Abstract Title]. - Society for Neuroscience

[Abstract Title]. - Society for Neuroscience

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

oscillations within mechanical components (3-8Hz) was ~0.045mm and central components (8-<br />

12 & 16-30Hz) were ~0.034mm and ~0.009mm, respectively.<br />

OBJECTIVE: Determine whether it is possible to self-modulate NPT.<br />

METHODS: We recorded the postural index finger tremor of 30 subjects (mean 25.7 ± 3.8<br />

years) with a laser in four conditions: A) eyes closed, without any attempt to self-modulate NPT<br />

amplitude, B) no visual feedback, trying to reduce NPT amplitude, C) visual feedback, trying to<br />

reduce NPT amplitude. For B & C, subjects were asked to avoid using muscle contraction as a<br />

means to stabilise the finger. Finally, D) subjects were asked to reduce NPT amplitude using<br />

voluntary muscle contraction. We used EMG to monitor the activity of extensor digitorum<br />

communis and flexor digitorum superficialis.<br />

RESULTS: We observed that total amplitude of NPT did not change significantly between<br />

conditions A and B (p>0.05, 0.121 ± 0.053mm & 0.117 ± 0.044mm, respectively). With visual<br />

feedback (C), a significant decrease of NPT amplitude was observed (p

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!