"Cervicogenic" headache. An hypothesis.
D003937:Diagnosis, Differential; D005260:Female; D006261:Headache / Q000145:classification / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000145:classification / Q000175:diagnosis; D009407:Nerve Block; D013116:Spinal Cord / Q000503:physiopathology