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. Author manuscript; available in PMC: 2023 May 10.
Published in final edited form as: Brain Stimul. 2022 Dec 24;16(1):56–67. doi: 10.1016/j.brs.2022.12.011

Fig. 3. Experimental protocol.

Fig. 3.

(a) Four fingers are placed on four keys labeled “1”, “2”, “3”, “4” (thumb is not used). A monitor prompts the subject to press the keys in the sequence shown. Each trial comprises a 10-s interval during which the subject repeatedly presses the sequence as fast as possible, followed by 10 s of rest. Each section contains 36 trials lasting 12 min total. (b) An initial learning section using the left (non-dominant) hand is paired with 12 min of stimulation of the contralateral hemisphere (right). This is followed by a 1-h break. The task is repeated to test for carryover effects without stimulation. Different sequences S1, S2, and S3 are used throughout different sections. S1: 4-1-3-2-4, S2: 2-3-1-4-2, S3: 3-4-2-1-3.