"Ailments of unknown cause" . "RTT" . "Neurodegenerative disorders" . "Evolutionary developmental biology" . "Geriatrics" . "Genes" . "RTTNEURO" . "Glial cells" . "Psychiatric diagnosis" . "Parkinson's disease" . "Medical terminology" . "Aging-associated diseases" . "Transcription factors" . "Neurons" . "Signal transduction" . "Cytoskeletal defects" .