In the Vågå study of
headache epidemiology, 1838
parishioners in the age group
18–65 years were included (88.6%
of the relevant population). Each
individual was questioned in a
face-to-face situation. In this population,
a search of rare unilateral
headaches was also made, in spite
of their presumed rarity.
Trigeminal neuralgia was present
in two cases. Two individuals with
SUNCT traits were observed.
Hemicrania continua may have
been present in one individual.
Also observed were: optic neuritis
(
n
=1), herpes zoster (
n
=4); a case
of unilateral headache upon neck
rotation (chronic paroxysmal hemicrania
variant? or "forme fruste" of
the neck–tongue syndrome?); masseter
muscle spasm (
n
=1); temporo-mandibular joint dislocation
(
n
=1); and possible carotidynia
(
n
=3). A particularly intriguing
form of headache was a unilateral,
neuralgiform (?) pain, associated
with ipsilateral, regular jabs and
allodynia, a combination observed
in eight females. A couple of conditions
that entirely defy rubrication
are also reported.