Okuma AnlamaSoru #9343
Sleep and Memory Consolidation
For decades, neuroscientists viewed sleep simply as a necessary downtime for physiological recuperation. However, contemporary brain imaging research has revealed that the sleeping brain is engaged in an intensely active and meticulously organized sequence of cognitive maintenance. During slow-wave non-REM sleep, newly formed neural memories initially stored in the fragile and capacity-limited hippocampus are systematically reactivated and transferred to the vast, durable architecture of the neocortex. This intricate biological relay prevents catastrophic memory interference, allowing new experiences to integrate smoothly into established knowledge networks. Furthermore, during rapid-eye-movement (REM) sleep, emotional valences associated with traumatic or distressing memories are effectively dampened through neurochemical shifts, particularly the temporary cessation of noradrenaline. Consequently, sleep deprivation does not merely induce daytime fatigue; it fundamentally compromises memory retention, emotional equilibrium, and cognitive plasticity. It can be inferred from the passage that during REM sleep, ----.
- A)noradrenaline levels surge dramatically to stimulate vivid dream recall
- B)the emotional intensity of traumatic memories is mitigated due to neurochemical changes
- C)the neocortex shuts down entirely to allow hippocampal regeneration
- D)individuals lose their ability to regulate emotional responses upon waking
- E)long-term memory transfer ceases completely and permanently
Cevabı ve çözümü göster
Doğru cevap: B) the emotional intensity of traumatic memories is mitigated due to neurochemical changes
Çözüm: Metinde REM uykusunda travmatik veya sıkıntılı anıların duygusal yoğunluğunun (emotional valences) noradrenalin salınımının durması sayesinde yatıştırıldığı (dampened) ifade edilmiştir. Doğru cevap B'dir.