(A) Right TPJ activation showed greater activation in the control group than the premutation group in the contrast of TWM retrieval > SWM retrieval (MNI coordinates (x,y,z): 52, −38, 22). (B) Beta coefficients in the right TPJ in neurotypical and premutation groups in the retrieval phase of each WM task. Only the neurotypical group showed significant enhancement of activation in the right TPJ during TWM retrieval than SWM retrieval, while such selective enhancement in the right TPJ for temporal processing was absent in the premutation group.