Browsing St. Olavs hospital by Author "Olsen, Alexander"

Now showing items 21-35 of 35

    • Multimodal Analysis of Secondary Cerebellar Alterations After Pediatric Traumatic Brain Injury 

      Keleher, Finian; Lindsey, Hannah; Kerestes, Rebecca; Amiri, Houshang; Asarnow, Robert; Babikian, Talin; Bartnik-Olson, Brenda L.; Bigler, Erin D; Caeyenberghs, Karen; Ewing-Cobbs, Linda; Giza, Christopher C.; Goodrich-Hunsaker, Naomi J; Hodges, Cooper B.; Hoskinson, Kristen R; Irimia, Andrei; Königs, Marsh; Max, Jeffrey; Newsome, Mary R; Olsen, Alexander; Ryan, Nicholas P; Schmidt, Adam T.; Stein, Dan J; Suskauer, Stacy J; Ware, Ashley L; Wheeler, Anne L; Zielinski, Brandon A; Thompson, Paul; Harding, Ian H.; Tate, David F.; Wilde, Elisabeth; Dennis, Emily L (Peer reviewed; Journal article, 2023)
      IMPORTANCE: Traumatic brain injury (TBI) is known to cause widespread neural disruption in the cerebrum. However, less is known about the association of TBI with cerebellar structure and how such changes may alter executive ...

    • Poorer sleep health is associated with altered brain activation during cognitive control processing in healthy adults 

      Smevik, Hanne; Habli, Sarah; Saksvik, Simen Berg; Kliem, Elisabeth; Evensmoen, Hallvard Røe; Conde, Virginia; Petroni, Agustin; Asarnow, Robert F.; Dennis, Emily L.; Eikenes, Live; Kallestad, Håvard; Sand, Trond Halfdan; Thompson, Paul M.; Saksvik-Lehouillier, Ingvild; Håberg, Asta; Olsen, Alexander (Peer reviewed; Journal article, 2023)
      This study investigated how proactive and reactive cognitive control processing in the brain was associated with habitual sleep health. BOLD fMRI data were acquired from 81 healthy adults with normal sleep (41 females, age ...

    • Post-concussion symptoms three months after mild-to-moderate TBI: characteristics of sick-listed patients referred to specialized treatment and consequences of intracranial injury 

      Fure, Silje Christine Reistad; Howe, Emilie; Spjelkavik, Øystein; Røe, Cecilie; Rike, Per-Ola; Olsen, Alexander; Ponsford, Jennie; Andelic, Nada; Løvstad, Marianne (Journal article; Peer reviewed, 2021)
      Objective: To present pre-injury, injury-related, work-related and post-injury characteristics, and to compare patients with and without traumatic intracranial abnormalities, in a treatment-seeking sample with persistent ...

    • Predictors of insomnia symptoms in police employees: a longitudinal investigation and comparison of personality and psychosocial work factors 

      Sørengaard, Torhild Anita; Langvik, Eva; Olsen, Alexander; Saksvik-Lehouillier, Ingvild (Peer reviewed; Journal article, 2022)
      Insomnia is a growing public health concern and a risk factor for reduced health, safety, and performance among workers. This study investigated and compared the predictive value of personality traits and psychosocial ...

    • The prevalence and stability of sleep-wake disturbance and fatigue throughout the first year after mild traumatic brain injury 

      Saksvik, Simen Berg; Karaliute, Migle; Kallestad, Håvard; Follestad, Turid; Asarnow, Robert F.; Vik, Anne; Håberg, Asta; Skandsen, Toril; Olsen, Alexander (Peer reviewed; Journal article, 2020)
      In this prospective, longitudinal study, we aimed to determine the prevalence and stability of sleep-wake disturbance (SWD) and fatigue in a large representative sample of patients (Trondheim mild traumatic brain injury ...

    • Prior Prognostic Expectations as a Potential Predictor in Neurofeedback Training 

      Damanskyy, Yevhen; Olsen, Alexander; Hollup, Stig Arvid (Peer reviewed; Journal article, 2021)
      The present study evaluated whether subjects’ expectations and neurofeedback training performance predict neurofeedback efficacy in cognitive training by controlling both factors as statistical variables. Twenty-two ...

    • A protocol for the development and validation of a virtual reality-based clinical test of social cognition 

      Matre, Martin; Johansen, Truls Sveløkken; Olsen, Alexander; Tornås, Sveinung; Martinsen, Anne Catrine Trægde; Lund, Anne; Becker, Frank; Brunborg, Cathrine; Spikman, Joke; Ponsford, Jennie; Neumann, Dawn; McDonald, Skye; Løvstad, Marianne (Peer reviewed; Journal article, 2023)
      Background Impairments in social cognition are common after traumatic brain injury (TBI) and may have severe negative consequences for patients and their families. Most tests of social cognition have limited ecological ...

    • Regional brain volume prior to treatment is linked to outcome after cognitive rehabilitation in traumatic brain injury 

      Olsen, Alexander; Dennis, Emily L.; Stubberud, Jan Egil; Hovenden, Elizabeth S.; Solbakk, Anne-Kristin; Endestad, Tor; Hol, Per Kristian; Schanke, Anne-Kristine; Løvstad, Marianne; Tornås, Sveinung (Peer reviewed; Journal article, 2022)
      Cognitive rehabilitation is useful for many after traumatic brain injury (TBI), but we lack critical knowledge about which patients benefit the most from different approaches. Advanced neuroimaging techniques have provided ...

    • The Relationship of Psychiatric Symptoms with Performance-Based and Self-Reported Cognitive Function After Ischemic Stroke 

      Kliem, Elisabeth; Gjestad, Elise Ødegård; Ryum, Truls; Olsen, Alexander; Thommessen, Bente; Indredavik, Bent; Bieliauskas, Linas; Due-Tønnessen, Paulina; Fladby, Tormod; Grambaite, Ramune (Peer reviewed; Journal article, 2021)
      Objective: Findings on the relationship of psychiatric symptoms with performance-based and self-reported cognitive function post-stroke are inconclusive. We aimed to (1) study the relation of depression and anxiety to ...

    • Self-administered biofeedback treatment app for pediatric migraine: A randomized pilot study 

      Stubberud, Anker; Linde, Mattias; Brenner, Eiliv; Heier, Martin; Olsen, Alexander; Aamodt, Anne Hege; Gravdahl, Gøril Bruvik; Tronvik, Erling Andreas (Peer reviewed; Journal article, 2020)
      Objective To investigate the effect size, safety, and tolerability of a therapist‐independent biofeedback treatment app among adolescent with migraine. Materials and Methods This was a prospective, 3:1 ratio randomized, ...

    • Self-reported cognitive and psychiatric symptoms at 3 months predict single-item measures of fatigue and daytime sleep 12 months after ischemic stroke 

      Kliem, Elisabeth; Labberton, Angela Susan; Barra, Mathias; Olsen, Alexander; Thommessen, Bente; Thomas, Owen Matthew Truscott; Gjestad, Elise Ødegård; Indredavik, Bent; Grambaite, Ramune (Peer reviewed; Journal article, 2022)
      Introduction: Post-stroke fatigue and increased need for daytime sleep are multidimensional and insufficiently understood sequelae. Our aim was to study the relationships of self-reported cognitive and psychiatric symptoms ...

    • Self-reported cognitive and psychiatric symptoms at 3 months predict single-item measures of fatigue and daytime sleep 12 months after ischemic stroke 

      Kliem, Elisabeth; Labberton, Angela Susan; Barra, Mathias; Olsen, Alexander; Thommessen, Bente; Thomas, Owen Matthew Truscott; Gjestad, Elise Ødegård; Indredavik, Bent; Grambaite, Ramune (Peer reviewed; Journal article, 2022)
      Introduction: Post-stroke fatigue and increased need for daytime sleep are multidimensional and insufficiently understood sequelae. Our aim was to study the relationships of self-reported cognitive and psychiatric symptoms ...

    • Toward a global and reproducible science for brain imaging in neurotrauma: the ENIGMA adult moderate/severe traumatic brain injury working group 

      Olsen, Alexander; Babikian, Talin; Bigler, Erin D.; Caeyenberghs, Karen; Conde, Virginia; Dams-O’Connor, Kristen; Dobryakova, Ekaterina; Genova, Helen; Grafman, Jordan; Håberg, Asta; Heggland, Ingrid; Hellstrøm, Torgeir; Hodges, Cooper B.; Irimia, Andrei; Jha, Ruchira M.; Johnson, Paula K.; Koliatsos, Vassilis E.; Levin, Harvey; Li, Lucia M.; Lindsey, Hannah M.; Livny, Abigail; Løvstad, Marianne; Medaglia, John; Menon, David; Mondello, Stefania; Monti, Martin M.; Newcombe, Virginia F.J.; Petroni, Agustin; Ponsford, Jennie; Sharp, David; Spitz, Gershon; Westlye, Lars Tjelta; Thompson, Paul M.; Dennis, Emily L.; Tate, David; Wilde, Elisabeth A.; Hillary, Frank G. (Peer reviewed; Journal article, 2020)
      The global burden of mortality and morbidity caused by traumatic brain injury (TBI) is significant, and the heterogeneity of TBI patients and the relatively small sample sizes of most current neuroimaging studies is a major ...

    • Trajectories of Persistent Postconcussion Symptoms and Factors Associated With Symptom Reporting After Mild Traumatic Brain Injury 

      Fordal, Linda; Stenberg, Jonas; Iverson, Grant L.; Saksvik, Simen Berg; Karaliute, Migle; Vik, Anne; Olsen, Alexander; Skandsen, Toril (Peer reviewed; Journal article, 2021)
      Objective To examine the trajectories of persistent postconcussion symptoms (PPCS) after mild traumatic brain injury (MTBI) and to investigate which injury-related and personal factors are associated with symptom reporting. ...

    • Workplace Factors Associated With Return to Work After Mild-to-Moderate Traumatic Brain Injury 

      Fure, Silje Christine Reistad; Howe, Emilie; Andelic, Nada; Brunborg, Cathrine; Olsen, Alexander; Rike, Per-Ola; Spjelkavik, Øystein; Enehaug, Heidi; Røe, Cecilie; Løvstad, Marianne (Peer reviewed; Journal article, 2022)
      Abstract Objective: Sociodemographic and injury-related predictors for return to work (RTW) after mild-to-moderate traumatic brain injury (TBI) have been extensively explored. However, there is a knowledge gap regarding ...