THE DREAMING BRAIN: A MULTIDISCIPLINARY SYNTHESIS OF NEURAL MECHANISMS, COGNITIVE FUNCTIONS AND PATHOLOGICAL MANIFESTATIONS

Dreaming, a universal phenomenon linked to REM sleep, arises from intricate interactions between limbic regions, cortical networks, and neurotransmitter dynamics. Neuroimaging highlights amygdala and hippocampal hyperactivity alongside prefrontal cortex hypoactivity, elucidating the emotional vividness and cognitive disorganization of dreams. Cholinergic pathways drive REM sleep, while suppressed serotonergic and noradrenergic activity impairs reality monitoring. Emerging evidence suggests multifaceted roles for dreaming: consolidating memories via hippocampal-neocortical dialogue, modulating emotions through fear extinction, and fostering creativity via associative cognition. Pathological dream patterns such as PTSD-related nightmares or reduced recall in depression reflect dysregulated neural circuits. Therapeutic strategies, including SSRIs and cognitive therapies, target these mechanisms. Innovations like fMRI-based dream decoding and cross-cultural studies reveal conserved neurophysiology beneath sociocultural variations. This synthesis positions dreaming as a lens for exploring consciousness, sleep-dependent cognition, and neuropsychiatric interventions. Future research may leverage closed-loop neuromodulation to probe dream content and neuroplasticity. Peer Review History: Received 6 February 2025; Reviewed 11 March 2025; Accepted 16 April; Available online 15 May 2025