Karl Bjørnar Alstadhaug
Job description
Alstadhaug fullførte profesjonsstudiet i medisin ved UiT i Tromsø i 1999. Han ble spesialist i nevrologi i 2007, og doktorerte samme år med avhandlingen Temporal patterns of migraine. I tillegg til forskning og undervisning har han i over 20 år jobbet som klinisk nevrolog.
Lise Rystad,
Tore,
Øyvind Olav,
Gøril Bruvik,
Irina,
Sasha
et al.:
Candesartan versus placebo for migraine prevention in patients with episodic migraine: a randomised, triple-blind, placebo-controlled, phase 2 trial
Lancet Neurology 01. octubre 2025 DOI
Nora S,
Tonje,
Kjersti Grøtta,
Karl Bjørnar
:
Migraine through puberty and menopausal transition-data from the population-based Norwegian Women and Health study (NOWAC)
Cephalalgia 2025 DOI
Karl Bjørnar,
Ane Skaare
:
Praksis bør endres ved spinalpunksjon
Tidsskrift for Den norske legeforening (Tidsskriftet) 2025 DOI
Cathrine Goberg,
Vetle Nilsen,
Maria,
Karl Bjørnar,
Ingrid Kristine,
Geir Julius
et al.:
Amyotrophic lateral sclerosis caused by the C9orf72 expansion in Norway–prevalence, ancestry, clinical characteristics and sociodemographic status
Karl Bjørnar,
Espen
:
Å kunne stave og skrive, men ikke lese
Tidsskrift for Den norske legeforening (Tidsskriftet) 2024 DOI
Ane Skaare,
Ole Lars,
Karl Bjørnar
:
Visual inspection versus spectrophotometry for xanthochromia detection in patients with sudden onset severe headache—A diagnostic accuracy study
Nora Stensland,
Kjersti,
Karl Bjørnar,
Tonje Bjørndal
:
Cumulative exposure to estrogen may increase the risk of migraine in women
Camilla,
Øyvind,
Ole-Bjørn,
Sigve Strand,
Tori Navestad,
Karl Bjørnar
et al.:
Repeat expansions in AR, ATXN1, ATXN2 and HTT in Norwegian patients diagnosed with amyotrophic lateral sclerosis
Karl Bjørnar,
Charalampos,
Axel Meyer
:
Beverages, caffeine, and Parkinson's disease
2023 DOI
Karl Bjørnar,
Grete,
Hans Kristian
:
Could recurrent painful ophthalmoplegic neuropathy be caused by a neurovascular conflict?: A case report
Cephalalgia Reports 2023 DOI
Marianne,
Hanne De,
Ellen Christin,
Karl Bjørnar,
Britt
:
Embodiment, tailoring, and trust are important for co-construction of meaning in physiotherapy after stroke: A qualitative study
Marianne,
Ellen Christin,
Karl Bjørnar,
Britt
:
Effect of innovative vs. usual care physical therapy in subacute rehabilitation after stroke. A multicenter randomized
controlled trial
Marianne,
Hanne De,
Karl Bjørnar,
Ellen Christin,
Britt
:
The precarity of patient participation - a qualitative interview study of experiences from the acute stroke and rehabilitation journey
Cathrine Goberg,
Øyvind Løvold,
Tori Navestad,
Karl Bjørnar,
Ingrid Kristine,
Geir Julius
et al.:
Genetic Epidemiology of Amyotrophic lateral Sclerosis in Norway: A 2-Year Population-Based Study
Merethe,
Hanne,
Diana Hristova,
Oana-Gratiela,
Karl Bjørnar
:
En mann i 40-årene med akutt forvirring
Andreas Kildahl,
Espen,
Karl Bjørnar
:
Effectiveness of Natalizumab in Achieving No Evidence of Disease Activity (NEDA-3)—Data From a Local Norwegian Cohort
Karl Bjørnar,
Hilde Karen,
Kai Ivar,
Anna P.
:
Sudden caffeine withdrawal triggers migraine—A randomized controlled trial
Espen,
Kjell-Morten,
Nina Agnethe Grytten,
Karl Bjørnar
:
Comorbidity in multiple sclerosis patients from Nordland County, Norway - validated data from the Norwegian Patient Registry
Ane Skaare,
Francis,
Farid,
Diana Hristova,
Kathrine Grønning,
Karl Bjørnar
:
Occurrence of postdural puncture headache—A randomized controlled trial comparing 22G Sprotte and Quincke
Ane Skaare,
Karl Bjørnar
:
What is currently the best investigational approach to the patient with sudden-onset severe headache?
Espen,
Kjell-Morten,
Nina,
Karl Bjørnar
:
Validation of the multiple sclerosis diagnosis in the Norwegian Patient Registry
Karl Bjørnar,
Anna P.
:
Caffeine and primary (migraine) headaches-friend or foe?
Anne Hege,
Marte-Helene,
Karl Bjørnar,
Guttorm,
Aud Nome,
Tine
et al.:
Praktisk håndtering av hodepine
Espen,
Karl Bjørnar,
Marie,
Farid,
Francis
:
Amyotrophic lateral sclerosis in Nordland county, Norway, 2000–2015: prevalence, incidence, and clinical features
Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration 2018 DOI
Karl Bjørnar,
Hilde Karen,
Espen Saxhaug
:
Prävention und Therapie des Medikamentenübergebrauchskopfschmerzes
Der Schmerz (Berlin. Print) 2018 DOI
Karl Bjørnar,
Randi,
Francis
:
Progressive multifocal leukoencephalopathy in a patient with systemic mastocytosis treated with cladribine
Journal of Clinical Virology 2017 DOI
Svein Ivar,
Kai Ivar,
Aleksander,
Karl Bjørnar
:
Photophobia and seasonal variation of migraine in a subarctic population
Headache 2017 DOI
Kai Ivar,
Karl Bjørnar,
Svein Ivar
:
A randomized trial of telemedicine efficacy and safety for nonacute headaches
Karl Bjørnar,
Kjell-Morten,
Christine Hanssen
:
Progredierende multifokal leukoencefalopati
Tidsskrift for Den norske legeforening (Tidsskriftet) 12. diciembre 2017 DOI
Karl Bjørnar,
Hilde Karen,
Espen Saxhaug
:
Preventing and treating medication overuse headache
Kai Ivar,
Karl Bjørnar,
Svein Ivar
:
Headache patients' satisfaction with telemedicine: a 12-month follow-up randomized non-inferiority trial
Espen,
Kjell-Morten,
Karl Bjørnar
:
The prevalence and characteristics of epilepsy in patients with multiple sclerosis in Nordland county, Norway
Seizure 2017 DOI
Kai Ivar,
Karl Bjørnar,
Svein Ivar
:
Telemedicine in the management of non-acute headaches: A prospective,open-labelled non-inferiority,randomised clinical trial
Cephalalgia 2016 DOI
Kai Ivar,
Karl Bjørnar,
Svein Ivar
:
Acceptability, feasibility, and cost of telemedicine for nonacute headaches: A randomized study comparing video and traditional consultations
Karl Bjørnar,
Hanne Winge,
Jan Fredrik,
Christian A.
:
A case of relapsing-remitting facial palsy and ipsilateral brachial plexopathy caused by HSV-1
Journal of Clinical Virology 2016 DOI
Hilde Karen,
Erling Andreas,
Karl Bjørnar
:
Lack of association between cluster headache and PER3 clock gene polymorphism
Hilde Karen,
Therese von,
Karl Bjørnar
:
Reduced cranial parasympathetic tone during the remission phase of cluster headache
Cephalalgia 2015 DOI
Karl Bjørnar,
Anne Hege
:
Etablering av medisinske sannheter
Karl Bjørnar,
Erling Andreas,
Anne Hege
:
Transient ischemic attack or migraine with aura?
Marianne,
Hanne De,
Ellen Christin,
Karl Bjørnar,
Britt
:
Felles meningsskaping i fysioterapi etter hjerneslag
2022
Marianne,
Hanne De,
Karl Bjørnar,
Ellen Christin,
Britt
:
Den sårbare deltakelsen. En kvalitativ studie om erfaringer fra akutt hjerneslag og rehabilitering.
2022
Marianne,
Ellen Christin,
Karl Bjørnar,
Britt
:
The precarious patient participation - a qualitative interview study of experiences from the acute stroke and rehabilitation journey
2022
Marianne,
Hanne De,
Ellen Christin,
Karl Bjørnar,
Britt
:
Embodiment, tailoring and trust and their importance for co-construction of meaning in physiotherapy after a stroke
2022
Marianne,
Ellen Christin,
Karl Bjørnar,
Britt
:
Individualized, comprehensive physiotherapy vs usual care. Effects on balance, gait and physical activity in subacute rehabilitation after stroke: a multicentre randomized controlled trial
2022
Kathrine Grønning,
Karl Bjørnar
:
Room tilt illusion and subclavian steal - A case report
Karl Bjørnar,
Christine Hanssen,
Liv T. N.,
Irini,
Hilde Karen
:
Progressive multifocal leukoencephalopathy treated with interleukin-7
Clinical Infection in Practice 2020 DOI
Karl Bjørnar,
Merethe
:
Hemichorea-hemiballisme
Tidsskrift for Den norske legeforening (Tidsskriftet) 2019 DOI
Kjell-Morten,
Stephan,
Karl Bjørnar
:
Long-term, real-world effectiveness of natalizumab treatment in relapsing-remitting multiple sclerosis (RRMS): data from ≥6 years in the TYSABRI® Observational Program (TOP) Nordic and global cohorts.
2019
Karl Bjørnar,
Hilde Karen
:
Spot On?
Headache 2018 DOI
Hilde Karen,
Therese von,
Karl Bjørnar
:
Retinal vasculature in cluster headache
Cephalalgia 2017 DOI
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Research interests
Til vanlig jobber Alstadhaug på nevrologisk avdeling I Bodø, og hans forskning er først og fremst klinisk, fokusert på alt fra hjerneslag og infeksjoner i sentralnervesystemet til demyeliniserende sykdommer og ulike hodepinetilstander. Han er spesielt interessert i migrene og hypothalamus sin rolle ved primære hodepiner. I 2014-2016 var han gjesteforsker ved Imperial College i London der han jobbet med en eksperimentell dyremodell.
Teaching
Alstadhaug har lang og bred erfaring som underviser og foredragsholder. Han har undervist siste års medisinstudenter siden 2009, og har skrevet tre fag-/lærebøker, Migreneboken (2011), Den nevrologiske pasient (2022) og Klinisk nevrobiologi (2025).