Night terrors are distinctly different from typical nightmares. With a nightmare, a child remembers the distressing dream and calms down when comforted by a parent after waking. In contrast, night terrors occur during non-rapid eye movement sleep, typically in the first third of the night during deep slow-wave sleep. The child may suddenly scream, weep, thrash, or sit up with eyes wide open in sheer panic. However, they are not actually awake. Caught between sleep and arousal, they cannot respond to comfort and generally have no memory of the event the following morning.
Modern medicine classifies night terrors as a type of sleep-wake disorder. They are primarily explained by an immature central nervous system. When the transition from deep sleep to partial arousal does not occur smoothly, the brain seems caught between states. Because the child's brain is still developing, particularly the frontal lobe responsible for emotional regulation, it reacts sensitively to triggers like fatigue and emotional tension.
Neurotransmitters and hormones also play a significant role. When stress hormones such as cortisol and adrenaline rise, the sympathetic nervous system, which directs the fight-or-flight response, can become hyperactivated. This triggers physical reactions during sleep, such as an elevated heart rate, rapid breathing, and sweating. When the amygdala becomes overly reactive, it amplifies internal fear even without external threats, precipitating night terrors. In this way, the concept of heart heat found in Donguibogam parallels modern medical observations of central nervous system hyperactivation and sympathetic arousal.
Several factors can trigger or worsen night terrors. Sleep deprivation and irregular sleep patterns are among the most frequent causes. When a child misses sleep or goes to bed at inconsistent hours, the internal biological clock and circadian rhythm are disrupted, lowering sleep quality and raising the likelihood of episodes. In addition, fever from infections, psychological stress, emotional anxiety, and certain medications can provoke episodes. Clinical studies also note that sleep-related breathing problems, such as sleep apnea, can increase how often night terrors occur.
A child's night terrors should not be seen as simple bad dreams, but as the result of a developing nervous system responding to stress and physical fatigue. Recognizing this makes it easier to respond with patience and consult a professional to establish a calmer sleep setting.
