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Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

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Published on: September 11, 2017

Typing keystroke duration changed after submaximal isometric finger exercises.

Che-Hsu Joe Chang¹, Peter W Johnson, Jeffrey N Katz

¹Department of Environmental Health, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA, 02115, USA. chjchang@gmail.com

European Journal of Applied Physiology

|October 15, 2008

Summary

This summary is machine-generated.

Touch-typing keystroke duration shortened after isometric finger exercises. This change correlated with altered muscle force in finger flexors and extensors, indicating a physiological link.

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Area of Science:

Motor Control
Human Physiology
Exercise Science

Background:

Touch-typing involves complex motor skills.
Muscle fatigue and physiological changes can impact fine motor performance.

Purpose of the Study:

To investigate the effect of isometric finger exercises on touch-typing keystroke duration.
To determine if changes in typing speed correlate with physiological changes in finger muscles.

Main Methods:

A repeated-measures laboratory experiment was conducted.
Fourteen right-handed touch-typists performed isometric flexion exercises or a no-force control condition.
Keystroke duration and isometric finger force were measured before and after each condition.

Main Results:

Keystroke duration decreased by 5% (6 ms, P < 0.05) after isometric exercises, but not after the control condition.
Peak isometric force decreased significantly in finger flexor (17-26%) and extensor (4-8%) muscles post-exercise.
Changes in typing speed were associated with alterations in the physiological state of finger muscles.

Conclusions:

Submaximal isometric finger exercises can acutely alter touch-typing speed.
These alterations in typing performance are linked to changes in the physiological state of finger flexor and extensor muscles.