Photoperiod-Induced Neuroplasticity in the Circadian System

Figure 3

Schematic view highlighting certain ipRGC (blue) and SCN (orange) projections and areas that demonstrate rhythmic activity (clock symbol). Many areas receive input from both ipRGCs and the SCN, such as the VLPo, SPZ, LH, and LHb. The SCN receives input from the IGL and DRN (dashed lines). Amyg: amygdala; DRN: dorsal raphe nuclei; Hipp: hippocampus; IGL: intergeniculate leaflet; ipRGC: intrinsically photosensitive retinal ganglion cell; LC: locus coeruleus; LH: lateral hypothalamus; LHb: lateral habenula; NAc: nucleus accumbens; PVN: paraventricular nucleus; SCN: suprachiasmatic nucleus; Sept: septal area; SPZ: subparaventricular zone; VLPo: ventrolateral preoptic area; VTA: ventral tegmental area.