Torbjørn A Fredriksen

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The concept that headache might stem from the neck is old. The term "cervicogenic headache" was coined in 1983. A new content was then given to this concept: cervicogenic headache (CEH) is in principle a unilateral headache, generally starting in the neck and "spreading" forwards. A strict unilaterality--that is, absolutely no pain on the opposite side--is(More)
Cervicogenic headache (CEH) is a headache, but its origin is in the neck. Recently, two cases of intracranial tumour, which unfortunately were originally diagnosed as CEH, were published. The authors felt that this sequence of events demonstrates the insufficiency of the current CEH criteria. We--on the other hand--feel strongly that, on the contrary, this(More)
The current criteria for cervicogenic headache (CEH) contain an anamnestic and a physical examination part. The latter consists of: 1) range of motion in the cervical spine (1+); 2) mechanical precipitation of head pain (uppermost score: 1.5+). These two factors are included in "Features indicative of cervical abnormality", outlined in the present context,(More)
Thirty-two patients with subarachnoid hemorrhage of unknown etiology were followed for periods from 1 to 6 1/2 years. Two more patients had normal initial angiograms, but were excluded when repeat angiography revealed an aneurysm. The mortality rate in this series was 6%. There was one possible early and no late episode of rebleeding. One patient developed(More)
The description of the peripheral course of the greater occipital nerve (GON) varies in the literature. An autopsy study was done on 20 cases without known headache problems. These findings showed a marked variation in the relation between the GON and nuchal muscles. The trapezius muscle was penetrated by the GON in 45% of cases, the semispinal muscle of(More)
A possible involvement of perivascular vasodilatory neuropeptides in subarachnoid haemorrhage (SAH) has been evaluated in man by measuring the levels of calcitonin gene related peptide (CGRP)-, substance P (SP)- and vasoactive intestinal peptide (VIP)-like immunoreactivity (LI) in the cranial venous outflow and in CSF in 34 patients admitted to the hospital(More)
Calcitonin gene-related peptide (CGRP) is a neurotransmitter candidate together with the tachykinins in sensory fibres in the cerebral vasculature, with possible vasodilating properties. The origin of most of the CGRP-immunoreactive cerebrovascular nerve fibres seems to be the trigeminal ganglion. Experimentally produced vasoconstriction in cats after(More)