主题词：Tryptophan and brain disorders; Genetics and Neurodevelopmental Disorders; Neuroscience and Neuropharmacology Research; Neurotransmitter Receptor Influence on Behavior; Genetic Associations and Epidemiology; Stress Responses and Cortisol; Functional Brain Connectivity Studies; Autism Spectrum Disorder Research; Bipolar Disorder and Treatment; Receptor Mechanisms and Signaling; Alzheimer's disease research and treatments; Schizophrenia research and treatment; Neuroinflammation and Neurodegeneration Mechanisms; Neuroendocrine regulation and behavior; Neurogenesis and neuroplasticity mechanisms; Epigenetics and DNA Methylation; Treatment of Major Depression; Attention Deficit Hyperactivity Disorder; Genomic variations and chromosomal abnormalities; Memory and Neural Mechanisms; Mental Health Research Topics; Diet and metabolism studies; Advanced Neuroimaging Techniques and Applications; Obsessive-Compulsive Spectrum Disorders; Child and Adolescent Psychosocial and Emotional Development