Editing Suprachiasmatic nucleus (section)

==Other signals from the retina==
[[Image:Circadian rhythm labeled.jpg|thumb|350px|A variation of an [[Arnold Eskin#Eskinogram|eskinogram]] showing the influence of light and darkness on circadian rhythms and related [[physiology]] and behavior through the SCN in humans]]
The SCN is one of many nuclei that receive nerve signals directly from the retina.

Some of the others are the [[lateral geniculate nucleus]] (LGN), the [[superior colliculus]], the basal optic system, and the [[pretectum]]:
* The ''LGN'' passes information about color, contrast, shape, and movement on to the [[visual cortex]] and itself signals to the SCN.
* The ''superior colliculus'' controls the movement and orientation of the eye.
* The basal optic system also controls eye movements.<ref name="pmid16221596">{{cite book | vauthors = Giolli RA, Blanks RH, Lui F | title = Neuroanatomy of the Oculomotor System | chapter = The accessory optic system: basic organization with an update on connectivity, neurochemistry, and function | series = Progress in Brain Research | volume = 151 | pages = 407–40 | date = 2006 | pmid = 16221596 | doi = 10.1016/S0079-6123(05)51013-6 | isbn = 9780444516961 | chapter-url = https://escholarship.org/content/qt3v25z604/qt3v25z604.pdf?t=lnpyco }}</ref>
* The ''pretectum'' controls the size of the [[pupil]].