title: Headache subsequent to whiplash.
abstract: Methodology varies greatly in whiplash studies; therefore, results are not directly comparable. Headache seems to be present in 50% to more than 75% of cases in the acute stage, and in 20% to 30% of cases in the early chronic stage. Headache naturally occurs frequently (> 75% of the cases ) in patients who consult headache specialists due to protracted symptoms. Malingering may explain some cases, and continuation/activation of prewhiplash headache may explain other cases. De novo headache also seems to occur. This headache may partly have cervicogenic headache characteristics: side-locked unilaterality and occipital onset. In one study, this type of headache was present in 8% at 6 weeks and 1% at 6 years. It was more rare than postwhiplash, unspecified headache. De novo postwhiplash headache may consist of cervicogenic headache and of noncervicogenic headache (probably in the acute phase).
authors.affiliation: Department of Neurology, St. Olavs Hospital, Olav Kyrres Gate 17, 7006 Trondheim, Norway. ellhed@online.no
authors.forename: Ottar
authors.initials: O
authors.lastname: Sjaastad
authors.forename: Torbjørn
authors.initials: T
authors.lastname: Fredriksen
authors.forename: Leiv
authors.initials: L
authors.lastname: Bakketeig
mesh_terms: D006261:Headache / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D006801:Humans; D010147:Pain Measurement; D013997:Time Factors; D014911:Whiplash Injuries / Q000150:complications* / Q000175:diagnosis* / Q000628:therapy