Consciousness arises from a foundational, primitive form called anoetic consciousness—a basic, first-person flow of affective, homeostatic, and sensory-perceptual experiences. This rudimentary state underlies all learning and memory, giving rise to noetic (knowledge-based) consciousness and, eventually, autonoetic consciousness, which enables mental time travel—reflecting on past experiences and imagining future possibilities. The authors propose a multi-tiered neuroevolutionary framework linking genetically controlled primary processes (affective), secondary processes (learning and memory), and higher tertiary processes (developmentally emergent), explaining how affective experiences become cognitive and object-oriented, leading to episodic memory and self-aware awareness.
Daytime emotional stress affects sleep physiology, dream patterns, and dream content, though its exact role remains unclear. Observed effects include exaggerated startle response, decreased dream recall, elevated awakening thresholds from REM sleep, altered REM latency, increased REM density and duration, and arousals indicating sleep disruption. Conversely, sleep quality and amount influence reactions to daytime events and general well-being. Sleep appears restorative, while deprivation heightens sensitivity to emotional and stressful stimuli. REM sleep, characterized by hyperlimbic and hypoactive dorsolateral prefrontal functioning alongside normal medial prefrontal cortex activity, is thought to mediate sleep's impact on next-day mood and coping.