Figure 2.

(a) Ranked correlation between ipsilateral activation in the motor cortex and absolute laterality quotient (Abs. LQ) during use of the dominant hand in RH and LH subjects (r = −0.601, P = 0.03). (b) Ranked correlation between the lateralization index (LI) in the motor cortex and absolute laterality quotient (Abs. LQ) during use of the dominant hand in RH and LH subjects (r = 0.694, P = 0.008). In a and b, the absolute value of the laterality quotient scores was taken, and the subjects were ranked according to the strength of handedness (irrespective of hand preference). The ranking on both axes is from lowest to highest.