<unk>  is the study of the dental and skeletal relationships in the head.  It is frequently used by dentists, often orthodontists in particular, as a treatment planning tool.
Two of the more popular methods of<unk>  used in orthodontology are the Steiner<unk> , named after Cecil C. Steiner, and the McNamara<unk> , named after James A. McNamara.  There are other methods as well, including the Ricketts<unk> .
Cephalometric analysis
Optometry
Brain mapping
Near infrared spectroscopy
Cognitive neuropsychology
Plethysmograph
Infrared spectroscopy
Apgar score