NOn-invasive Repeated THerapeutic STimulation for Aphasia Recovery

Low frequency (1Hz) repetitive transcranial magnetic stimulation (rTMS) over the center of the right Pars Triangularis for 15 minutes (900 pulses) prior to each Speech-Language therapy session. Stimulation intensity will be set at 90% of the resting motor threshold (RMT) of the left first dorsal interosseous (FDI) muscle.

2mA cathodal transcranial direct current stimulation (tDCS) over the right Pars Triangularis. The anode will be placed on the forehead over the contralateral eye. tDCS will start immediately before the speech-language therapy session and last throughout the session.

Low frequency (1Hz) repetitive transcranial magnetic stimulation (rTMS) over the Vertex for 15 minutes (900 pulses) prior to each Speech-Language therapy session. Stimulation intensity will be set at 10% of the resting motor threshold (RMT) of the left first dorsal interosseous (FDI) muscle.

Sham cathodal transcranial direct current stimulation (tDCS) over the right Pars Triangularis. The anode will be placed on the forehead over the contralateral eye. To elicit the typical skin sensation of real tDCS (tingling sensation on the skin when tDCS is turned on and off), the current will be turned on for 30 seconds and then turned off for the duration of the speech-language therapy session. The same procedure will be done at the end of the session.