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V5/MT Stimulation on Reading and Reading-related Measures in Developmental Dyslexia
Sponsor: Bambino Gesù Hospital and Research Institute
Summary
The present study grounds on the absence of evidence-based treatment in individuals with developmental dyslexia (DD). At this topic, the present study will explore the potential effect of transcranial direct current stimulation (tDCS) over left hemispheric direct Lateral Geniculate Nucleus (LGN)-V5/MT pathway, cerebral areas usually disrupted in individuals with DD. The investigators hypothesized that active tDCS over V5/MT will boost reading skills in children and adolescents with DD. On the contrary, sham (placebo condition) tDCS over V5/MT or active (control condition) tDCS over V1 will not have significant effect in improving reading skills. Further, both active and sham tDCS will be safe and well tolerated.
Official title: Probing the Efficacy of V5/MT Stimulation on Reading and Reading-related Measures in Children and Adolescents With Developmental Dyslexia
Key Details
Gender
All
Age Range
8 Years - 13 Years
Study Type
INTERVENTIONAL
Enrollment
36
Start Date
2023-09-01
Completion Date
2026-08-31
Last Updated
2023-08-04
Healthy Volunteers
Yes
Conditions
Interventions
Active HD-tDCS over V5/MT
For HD-tDCS a 4 × 1 montage (Kessler et al., 2013), small circular electrodes (diameter 1 cm) will be used with the anode placed centrally with a current intensity of 1 mA for a total of 20 minutes (30 s ramp up/down). Hereby, the anodal electrode modulates the excitability of the targeted area left V5/MT, whereas the other 4 electrodes return electrical currents that flow away from that area. V5/MT will be localised via published procedures and electrode's placement will be done according to the 10-20 International EEG 10-20 System for electrode placement.
Active HD-tDCS over V1
For HD-tDCS a 4 × 1 montage (Kessler et al., 2013), small circular electrodes (diameter 1 cm) will be used with the anode placed centrally with a current intensity of 1 mA for a total of 20 minutes (30 s ramp up/down). Hereby, the anodal electrode modulates the excitability of the targeted area left V1, whereas the other 4 electrodes return electrical currents that flow away from that area. V1 will be localised via published procedures and electrode's placement will be done according to the 10-20 International EEG 10-20 System for electrode placement.
Sham HD-tDCS over V5/MT or V1
Sham HD-tDCS will be delivered over left V5/MT or left V1. The same electrodes placement as well as the stimulation set-up will be used as in the active stimulation conditions, but the current will be applied for 30 s and will be ramped down (0 mA) during the rest of the session without the participants awareness. .
Locations (1)
Bambino Gesù Hospital and Research Institute
Roma, Italy