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Open-loop speed discrimination performance of ocular following response and perception
Kim Joris Boström1, Anne-Kathrin Warzecha
1Psych. Inst. II, Universität Münster, 48149 Münster, Germany. mail@kim-bostroem.de
Vision Research
|February 24, 2010
Summary
Neuronal noise
Area of Science:
- Neuroscience
- Visual Perception
- Oculomotor Function
Background:
- The origin of neuronal noise limiting behavioral responses is unresolved.
- Understanding noise sources in the visual motion pathway is crucial for system performance.
- Distinguishing noise in perceptual versus oculomotor systems is key.
Purpose of the Study:
- Investigate the source of noise in the human visual motion pathway.
- Determine if perception and eye movements share a common noise source.
- Compare speed discrimination abilities of perceptual and oculomotor systems.
Main Methods:
- Utilized ocular following response in human subjects.
- Employed a simultaneous psychophysical paradigm.
- Directly compared perceptual and oculomotor systems' speed discrimination.
Main Results:
- The perceptual system outperformed the oculomotor system under open-loop conditions.
- Responses between the perceptual and oculomotor systems were not correlated.
- Demonstrated differences in system performance and noise characteristics.
Conclusions:
- Suggests either separate perceptual and oculomotor pathways or significant post-sensory noise.
- Favors the conclusion that post-sensory (motor) noise is substantial.
- Highlights the impact of motor noise on overall system performance.
