• Perceptual and sensory processing deficits are treated as foundational to autism, integrating perceptual constancy, sensory dominance, arousal, and sensory discrimination with heterogeneous perceptual disabilities and neurophysiologic mechanisms across studies [1], [7], [4], [11], [19], [18].

• Behavioral interventions and language acquisition are foregrounded, with operant conditioning-based speech training, imitation training, and early treatment concepts showing varying prognosis and long-term impact in infantile autism [6], [16], [12], [9].

• Neurophysiological and biomarker research seeks objective correlates of autism through EEG, sleep-related responses, neurophysiologic mechanisms, and platelet serotonin measures, aiming to map brain–behavior links in autistic development [5], [8], [7], [10], [20].

• Diagnostic frameworks and differential diagnosis literature investigates objective criteria, organic vs psychogenic etiologies, and camp-based debates in child psychiatry, shaping how infantile autism is classified and understood [13], [2], [15].

• Sleep and arousal studies compare autistic and schizophrenic development, using dreaming, sleep architecture, and arousal dynamics as a lens to differentiate disorders and understand shared physiological patterns [17], [8], [18].