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Experiment layout. Sequence of events: (A) 10 min of data acquisition in resting state, followed by needling right accessory spinal nerve (ASN); (B) randomization in active or sham intervention; (C) 10 min of data acquisition in resting state. In caption, representation of the subcutaneous location of the ASN (yellow trace) between trapezius muscle (a) and sternocleidomastoid muscle (b).
