The Effects of Tapping Force and Speed on the Activation of Motor-related Cortices
- Author:
Ahmad Nazlim Yusoff
- Publication Type:Journal Article
- Keywords:
Finger tapping, Context specifi c region, Hemodynamic parameters, Superior parietal lobule, Precentral
- From:Malaysian Journal of Health Sciences
2013;11(2):41-49
- CountryMalaysia
- Language:English
-
Abstract:
This single participant functional magnetic resonance imaging (fMRI) study investigates the effects of tapping force and
speed on the activation characteristics in motor-related cortices during bilateral self-paced tapping of hand fi ngers.
The participant performed four types of self-paced hand fi nger tapping which are soft-slow (SS), soft-fast (SF), hard-slow
(HS) and hard-fast (HF) in an fMRI scan. A general linear model (GLM) was implemented in generating brain activation.
Statistical inferences were then made about the brain activations using Gaussian random fi eld theory (RFT) at corrected
signifi cant level (α = 0.05), given that there is no activation. The results indicate that the brain coordinates bilateral selfpaced
tapping of hand fi ngers with the involvement of motor-related cortices which are bilateral precentral gyrus (PCG),
bilateral cerebellum and supplementary motor area (SMA). The increase in tapping force accentuate signifi cant activation
(p < 0.05 corrected) in bilateral PCG (Brodmann Area (BA) 6) in accordance with its function in triggering motor action
such as controlling the tapping force. The increase in tapping speed causes a signifi cant (p < 0.05 corrected) increase
in brain activation only in somatosensory associated region in the right superior parietal lobule (SPL) or right BA7. This
suggests that SPL plays important roles in coordinating purposeful, skilled movements
- Full text:W020150511461274308874.pdf
