Fig. 2From: Physiological effects of touching sugi (Cryptomeria japonica) with the palm of the handResponse of brain activity indices during contact of materials via the palm of the right hand. a Overall mean oxy-hemoglobin (oxy-Hb) concentration in the left prefrontal cortex. b Overall mean oxy-Hb concentration in the right prefrontal cortex. N = 21, mean ± standard error, *p < 0.05 as determined using a paired t test (one-side) with Holm correctionBack to article page