Hemodynamic responses of voxels in the amygdala, hippocampus, and inferior frontal gyrus during the retrieval of autobiographical (AM; solid lines) or semantic (SM; stippled lines) memories. y-axes represent average signal change. From “Co-Activation of the Amygdala, Hippocampus and Inferior Frontal Gyrus During Autobiographical Memory Retrieval,” by D. L. Greenberg et al., 2005, Neuropsychologia, 43, p. 665. Copyright 2005 by Elsevier. Reprinted with permission.