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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Neurobiol Learn Mem. 2013 Dec 7;113:3–18. doi: 10.1016/j.nlm.2013.11.014

FIGURE 1.

FIGURE 1

A simplified schematic of fear neurocircuitry, showing functional homology of rat and human brain regions. PL in rat and dACC in human are homologues, both project to the lateral nucleus of the amygdala. IL in rat and vmPFC in human are homologues, both project to the basal nucleus and to intercalated cells of the amygdala. The circuitry within the amygdala is shared among species. Arrowheads represent excitatory projections and circle-endings represent inhibitory projections. Within the amygdala, green shapes represent glutamatergic (excitatory) cells and red shapes represent GABAergic (inhibitory) cells. Projections from lateral nucleus to CeL, from basal nucleus to CeM, and some other connections are not shown.

FIGURE ABBREVIATIONS:

CeL = centrolateral subdivision; CeM = centromedial subdivision; dACC = dorsal anterior cingulate cortex; H = hippocampus; IL = infralimbic cortex; ITC = intercalated neurons; PL = prelimbic cortex; SC = somatosensory cortex; T = thalamus