Visual inputs to the ________ serve to synchronize biorhythms with natural light and dark.
A) superior colliculi
B) pretectal nuclei
C) suprachiasmatic nucleus
D) lateral geniculate body

Question

Quizplus · Accepted Answer

The suprachiasmatic nucleus (SCN) is the master circadian clock in our brain, and it is located in the hypothalamus just above the optic chiasm. The SCN receives direct light input from the retina via the retinohypothalamic tract (RHT), which synchronizes its activity with the external light/dark cycle. This synchronization is important for regulating our sleep-wake cycle, body temperature, hormonal secretion, and other daily rhythms. Therefore, visual inputs to the SCN are essential for coordinating our biorhythms with natural light and dark. The other options (A, B, and D) are involved in visual processing and motor control, but not in circadian regulation.

Visual Inputs to the ________ Serve to Synchronize Biorhythms with Natural