suprachiasmatic nucleus; SCN
A tiny region in the brain's hypothalamus, directly above the optic chiasm, that acts as the master circadian clock.
The suprachiasmatic nucleus is known as the center of the biological clock.
光の刺激は、網膜から視交叉上核へ伝えられる。
Light stimuli are transmitted from the retina to the suprachiasmatic nucleus.
Compound of 視交叉 (optic chiasm) + 上 (above) + 核 (nucleus), directly describing its anatomical location.