Functional near‐infrared spectroscopy data acquisition
CORTEX
A multichannel fNIRS system (NIRScout, NIRx Medical Technologies LLC) was employed to measure the oxyhemoglobin (HbO) and deoxyhemoglobin (HbR) concentrations of the dyads simultaneously. The absorption of near‐infrared light was measured at the wavelengths of 785 and 830 nm and the sampling frequency was 3.91 Hz. Considering the key role of sensorimotor cortex (SMC) and prefrontal cortex (PFC) in the central regulation of acupuncture stimuli (Fernandez Rojas et al., 