title: A study of the indeterminate stage of sleep in oligophrenics: relationship with spindles and paradoxical sleep.
mesh_terms: D002648:Child; D002675:Child, Preschool; D004594:Electrophysiology; D005133:Eye Movements; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000503:physiopathology*; D012890:Sleep