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Neuronavigation-guided Repetitive Transcranial Magnetic Stimulation for Aphasia
Published on: May 6, 2016
Repetitive transcranial magnetic stimulation alters optic flow perception
Kenshi Tashiro1, Katsuya Ogata, Takao Yamasaki
1Department of Clinical Neurophysiology, Graduate School of Medical Sciences, Faculty of Medicine, Kyushu University, and Department of Medical Information Science, Kyushu University Hospital, Higashi-Ku, Japan. ketashi@neurophy.med.kyushu-u.ac.jp
Neuroreport
|February 23, 2007
Summary
Low-frequency repetitive transcranial magnetic stimulation prolonged inhibitory effects on optic flow perception. This technique is valuable for studying visuospatial cognition and visual motion processing.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- Optic flow, the visual motion perceived during self-movement, is crucial for controlling human locomotion.
- The primary visual cortex (V1) and extrastriate area (V5/MT) are key regions involved in processing visual motion and optic flow.
Purpose of the Study:
- To investigate the effects of low-frequency repetitive transcranial magnetic stimulation (rTMS) on coherent optic flow perception.
- To determine if rTMS applied to V1 or V5/MT influences the ability to perceive optic flow.
Main Methods:
- Low-frequency rTMS (0.9 Hz, 10 min) was applied to the primary visual cortex (V1) and the extrastriate area (V5/MT) in 12 healthy participants.
- Cz stimulation served as a control condition.
- Participants identified the focus of dots exhibiting coherent optic flow motion.
Main Results:
- Reaction time ratios between V1 and Cz, and between V5/MT and Cz, significantly increased 40 minutes after rTMS.
- These findings indicate a prolonged inhibitory effect of low-frequency rTMS on optic flow perception.
Conclusions:
- Low-frequency rTMS induces a lasting inhibitory effect on the perception of optic flow.
- This non-invasive stimulation technique offers a valuable tool for exploring visuospatial cognition and the neural mechanisms underlying visual motion processing.
