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Updated: Jan 20, 2026
12:09
Stimulating the Lip Motor Cortex with Transcranial Magnetic Stimulation
Published on: June 14, 2014
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Transcranial Magnetic Stimulation in Adults With Amblyopia
Ana Rita Tuna1, Nuno Pinto, Francisco Miguel Brardo
1CICS-Health Sciences Research Centre (ART, NP, FMB, AF, AFN, MVP), Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal; Dr. Lopes Dias School of Health (NP), Polytechnic Institute of Castelo Branco, Castelo Branco, Portugal; Department of Physics (FMB, AFN), University of Beira Interior, Covilhã, Portugal; and CICS-Health Sciences Research Centre (MVP), Faculty of Health Sciences, University of Beira Interior; ULS Guarda, Guarda, Portugal.
Summary
Continuous theta burst stimulation (cTBS) improved visual acuity, suppressive imbalance, and stereoacuity in amblyopic individuals. This non-invasive brain stimulation offers a promising therapeutic approach for amblyopia treatment.
Area of Science:
- Neuroscience
- Ophthalmology
- Medical Imaging
Background:
- Transcranial magnetic stimulation (TMS) can modulate visual cortex excitability and binocular balance.
- Amblyopia, or lazy eye, is a developmental disorder impacting visual acuity and binocular vision.
Purpose of the Study:
- To evaluate the effects of continuous theta burst stimulation (cTBS) on visual acuity, suppressive imbalance, and stereoacuity in amblyopic volunteers.
Main Methods:
- Thirteen amblyopic volunteers (aged 19-24) were randomly assigned to receive either active cTBS or placebo stimulation targeting the right occipital lobe.
- Visual parameters including visual acuity, suppressive imbalance, and stereoacuity were measured before and after the stimulation session.
Main Results:
- Active cTBS significantly improved visual acuity (0.32 to 0.19 logMar) and reduced suppressive imbalance (0.26 to 0.12) in the amblyopic eye.
- The control group receiving placebo stimulation showed no significant changes in these visual parameters.
Conclusions:
- Continuous theta burst stimulation over the right occipital lobe leads to significant visual enhancements in amblyopic individuals.
- These findings suggest cTBS is a viable non-invasive treatment for improving visual function in amblyopia.
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