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Difference in stimulus-response compatibility effect in premotor and motor time between upper and lower limbs
1Institute of Health and Sport Sciences, University of Tsukuba, Ibaraki, Japan. kidkato@taiiku.tsukuba.ac.jp
Perceptual and Motor Skills
|January 13, 1999
Summary
Stimulus-response compatibility effects differ between upper and lower limbs. Upper limb responses depend on central processing, while lower limb responses involve both central and peripheral motor control.
Area of Science:
- Neuroscience
- Human Motor Control
- Cognitive Psychology
Background:
- Stimulus-response compatibility (SRC) effects are crucial for understanding human reaction times.
- Previous research has explored SRC, but distinctions between upper and lower limb responses require further investigation.
Purpose of the Study:
- To investigate differences in SRC effects between upper and lower limbs.
- To differentiate the roles of central information processing and peripheral motor control in SRC.
Main Methods:
- 16 healthy subjects performed key-release tasks with upper or lower limbs.
- Stimuli were presented to one visual hemifield under compatible and incompatible SRC conditions.
- Premotor time and motor time were measured to assess response initiation and execution.
Main Results:
- SRC effects were observed in premotor time for both upper and lower limb responses.
- SRC effects were found in motor time exclusively for lower limb responses.
- Upper limb SRC was influenced solely by central processing, whereas lower limb SRC involved both central and peripheral factors.
Conclusions:
- The study highlights distinct SRC mechanisms for upper and lower limb movements.
- Central information processing significantly impacts SRC for both limb types.
- Peripheral motor control plays an additional role in SRC for lower limb responses.