The<unk>  consists of brief, relatively vague glossary-type definitions of a limited number of<unk> . It outlines five types of<unk>  vascular, myogenic (muscle tension), cervicogenic, traction, and inflammatory.
NIH classification of headaches
ICHD classification and diagnosis of migraine
Neurological pupil index
Rivermead post-concussion symptoms questionnaire
Apnea–hypopnea index
SWOG
Migraine Specific Quality of Life
Otoacoustic emission