Examlex
Compare and contrast Abbasid civilization under Harun al-Rashid with Frankish civilization at the time of Charlemagne. What were the differences, and what were the similarities, if any?
Sleep Apnea
A serious sleep disorder that occurs when a person's breathing is interrupted during sleep, often leading to health problems.
Suprachiasmatic Nucleus
A tiny region in the brain's hypothalamus responsible for controlling circadian rhythms, regulating the 24-hour cycle of biological processes.
Circadian Rhythm
An inherent mechanism that governs the cycle of sleep and wakefulness, repeating approximately every 24 hours.
Amygdala
A part of the brain involved in experiencing emotions, particularly those related to survival, such as fear and aggression.
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