Blar i NTNU Open på forfatter "Olsen, Alexander"
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Methodology Matters: Comparing Approaches for Defining Persistent Symptoms after Mild Traumatic Brain Injury
Karaliute, Migle; Saksvik, Simen Berg; Smevik, Hanne; Follestad, Turid; Einarsen, Cathrine Elisabeth; Vik, Anne; Håberg, Asta; Iverson, Grant L.; Skandsen, Toril; Olsen, Alexander (Peer reviewed; Journal article, 2021)Some people experience persistent post-concussion symptoms (PPCS) after mild traumatic brain injury (mTBI). A meaningful clinical classification and scientific progress are hampered by a lack of consensus regarding the ... -
Mild to moderate partial sleep deprivation is associated with increased impulsivity and decreased positive affect in young adults
Saksvik-Lehouillier, Ingvild; Saksvik, Simen Berg; Dahlberg, Berit Johanna; Tanum, Tiril Kristine; Ringen, Heidi; Karlsen, Håvard Rudi; Smedbøl, Trine; Sørengaard, Torhild Anita; Stople, Mailen; Kallestad, Håvard; Olsen, Alexander (Peer reviewed; Journal article, 2020)The effects of mild–moderate partial sleep deprivation on affective and cognitive functioning were evaluated in a naturalistic home environment, mimicking short sleep typically caused by demands from work or society. A ... -
Mind, Brain and Education: Exploring gender differences and the relationships between skills in first grade children
Eriksen, Adrian Dybfest (Doctoral theses at NTNU;2022:223, Doctoral thesis, 2022)Summary Gender differences and skills in first grade Knowledge about skill development and gender differences in school is very important for an evidence-based school, in order to ensure that every pupil gets ... -
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 ... -
Preterm birth leads to hyper-reactive cognitive control processing and poor white matter organization in adulthood
Olsen, Alexander; Dennis, Emily L; Evensen, Kari Anne Indredavik; Hollund, Ingrid Marie Husby; Løhaugen, Gro; Thompson, Paul M; Brubakk, Ann-Mari; Eikenes, Live; Håberg, Asta (Peer reviewed; Journal article, 2017)Individuals born preterm with very low birth weight (VLBW; birth weight ≤ 1500 g) are at high risk for perinatal brain injuries and deviant brain development, leading to increased chances of later cognitive, emotional, and ... -
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 ... -
Setting the Rest Interval in Actigraphy - A Systematic Review and Development of a Novel Manual
Austad, Sigrun Borgen; Follesø, Hanna Størksen (Master thesis, 2018)Sleep is becoming an increasingly important topic in the study of mental and physical health. Several methods exist for measuring sleep duration and quality. Actigraphy has become one of the most applied methods due to its ... -
Sleep restriction is associated with a decrease in positive affect in individuals with a history of mild traumatic brain injury
Lillehaug, Hanna (Master thesis, 2020)Individuals sustaining a mild traumatic brain injury (mTBI) are at risk of developing sleep problems and affective dysfunction postinjury. Sleep is critically involved in affective functioning, thus individuals exposed to ... -
Sleep restriction is associated with a decrease in positive affect in individuals with a history of mild traumatic brain injury
Lillehaug, Hanna (Master thesis, 2020)Mennesker med mild traumatisk hodeskade har økt risiko for utvikling av søvnproblemer og affektive problemer. Årsaken til dette er ukjent, men hjerneområder som er viktige i søvnregulering er spesielt utsatt ved mild ... -
Systematic review of executive function as a predictor of psychotherapy outcomes
Eliassen, Ingvild Vøllo (Master thesis, 2018)Background. Executive functioning is associated with important domains of human life, including individual goal attainment and mental health. Research has identified executive function as a potential transdiagnostic factor, ...