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. 2023 Feb 2;17:1088686. doi: 10.3389/fncir.2023.1088686

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Copyright © 2023 Santana, Silva, dos Santos, Costa, Nascimento Junior, Engelberth and Cavalcante.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Diagrammatic representation of the marmoset circadian timing system (green). The suprachiasmatic nucleus (SCN) and inner laminar of pregeniculate nucleus (PGNil) are retinorecipient structures involved with the biological rhythms. Note that although melanopsin-containing intrinsically photosensitive retinal ganglion cells (ipRGCs) were evidenced in marmoset retina, the retinal cell type(s) providing the input to circadian centers have not yet been identified. 3v, third ventricle; oc, optic chiasma; RHT, retinohypothalamic tract.