Fredrik Nylén

Research qualifications: Docent

0000-0003-3373-0934

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Associate professor at Department of Clinical Sciences Section: Speech-language pathology Role: Deputy head of department

1A, Norrlands universitets sjukhus

Publications Publications

eTWST: an extension to the timed water swallow test for increased dysphagia screening accuracy

Dysphagia (New York. Print)

Brage, Louise; Karlsson, Fredrik; Hägglund, Patricia; et al.

Perception of femininity and masculinity in voices as rated by transgender and gender diverse people, professional speech and language pathologists, and cisgender naive listeners

Journal of Voice

Holmberg, Jenny; Södersten, Maria; Linander, Ida; et al.

Reading aloud compared with positive expiratory pressure after abdominal surgery: a randomized controlled trial

International Journal of Global Health, Wolters Kluwer 2024, Vol. 7, (6)

Holmgren, Erik; Spyckerelle, Iris; Hultin, Magnus; et al.

Acoustic cues to femininity and masculinity in spontaneous speech

Journal of the Acoustical Society of America, American Institute of Physics (AIP) 2024, Vol. 155, (5) : 3090-3100

Nylén, Fredrik; Holmberg, Jenny; Södersten, Maria

Digital voice analysis as a biomarker of acromegaly

Journal of Clinical Endocrinology and Metabolism

Vouzouneraki, Konstantina; Karlsson, Fredrik; Holmberg, Jenny; et al.

Exploring motives and perceived barriers for voice modification: the views of transgender and gender-diverse voice clients

Journal of Speech, Language and Hearing Research, American Speech Language Hearing Association 2023, Vol. 66, (7) : 2246-2259

Holmberg, Jenny; Linander, Ida; Södersten, Maria; et al.

The Timed Water Swallow Test (TWST): normative data on swallowing capacity for healthy people aged 60 years and older

International Journal of Speech-Language Pathology, Taylor & Francis 2023, Vol. 25, (4) : 479-485

Hägglund, Patricia; Karlsson, Pernilla; Karlsson, Fredrik

A within-subject comparison of face-to-face and telemedicine screening using the timed water swallow test (TWST) and the test of mastication and swallowing of solids (TOMASS)

Dysphagia (New York. Print), Springer 2023, Vol. 38 : 483-490

Karlsson, Fredrik; Lovric, Leo; Matthelié, Josephine; et al.

Detection of subclinical motor speech deficits after presumed low-grade glioma surgery

Brain Sciences, MDPI 2023, Vol. 13, (12)

Mirkoska, Vesna; Antonsson, Malin; Hartelius, Lena; et al.

The Visible Speech platform: a research infrastructure for secure analysis of speech recordings

Stockholm: KTH Royal Institute of Technology 2022

Karlsson, Fredrik

Vocal activity detection and speaker diarization in speech databases: a feasibility study

Stockholm: KTH Royal Institute of Technology 2022

Karlsson, Fredrik

Do best practice recommendations align with current aphasia practices in the Swedish care context: a national survey

Aphasiology, Routledge 2022, Vol. 36, (8) : 903-920

Persson, Klara Josefina; Bråndal, Rut; Karlsson, Fredrik; et al.

The Test of Masticating and Swallowing Solids (TOMASS): Normative data for two crackers available in the Scandinavian and international markets

International Journal of Speech-Language Pathology, Taylor & Francis 2021, Vol. 23, (3) : 329-337

Hägglund, Patricia; Blom, Sandra; Thodén, Patrik; et al.

'superassp' and the need for a sparse signaltrack data format

Proceedings of Fonetik 2021, Lund: Centre for Languages and Literature 2021 : 23-26

Karlsson, Fredrik

On the Primary Influences of Age on Articulation and Phonation in Maximum Performance Tasks

Languages, MDPI 2021, Vol. 6, (4)

Karlsson, Fredrik; Hartelius, Lena

Speech function following deep brain stimulation of the caudal zona incerta: effects of habitual and high-amplitude stimulation

Journal of Speech, Language and Hearing Research, American Speech-Language-Hearing Association 2021, Vol. 64, (6) : 2121-2133

Sandström, Linda; Schalling, Ellika; Karlsson, Fredrik; et al.

Assessment of speech impairment in patients with Parkinson's disease from acoustic quantifications of oral diadochokinetic sequences

Journal of the Acoustical Society of America, Acoustical Society of America (ASA) 2020, Vol. 147, (2) : 839-851

Karlsson, Fredrik; Schalling, Ellika; Laakso, Katja; et al.

The effects of deep brain stimulation on speech intelligibility in persons with essential tremor

Journal of Speech, Language and Hearing Research, American Speech-Language-Hearing Association 2020, Vol. 63, (2) : 456-471

Sandström, Linda; Blomstedt, Patric; Karlsson, Fredrik; et al.

Speech following DBS for essential tremor: Effects of chronic and high-amplitude stimulation in the posterior subthalamic area

Twentieth Biennial Conference on Motor Speech: Motor Speech Disorders & Speech Motor Control, Feb 19 – 23, 2020, Santa Barbara, CA

Sandström, Linda; Schalling, Ellika; Karlsson, Fredrik; et al.

How Well Does Diadochokinetic Task Performance Predict Articulatory Imprecision?: Differentiating Individuals with Parkinson's Disease from Control Subjects

Folia Phoniatrica et Logopaedica, S. Karger 2019, Vol. 71, (5-6) : 251-260

Karlsson, Fredrik; Hartelius, Lena

Voice Tremor Outcomes of Subthalamic Nucleus and Zona Incerta Deep Brain Stimulation in Patients With Parkinson Disease

Journal of Voice, Elsevier 2019, Vol. 33, (4) : 545-549

Karlsson, Fredrik; Malinova, Elin; Olofsson, Katarina; et al.

Voice Tremor Response to Deep Brain Stimulation in Relation to Electrode Location in the Posterior Subthalamic Area

World Neurosurgery: X, Vol. 3 : 1-9

Sandström, Linda; Blomstedt, Patric; Karlsson, Fredrik

Long-term effects of unilateral deep brain stimulation on voice tremor in patients with essential tremor

Parkinsonism & Related Disorders, Elsevier 2019, Vol. 60 : 70-75

Sandström, Linda; Blomstedt, Patric; Karlsson, Fredrik

How well does DDK task performance predict fluent speech articulation?

Nineteenth Biennial Conference on Motor Speech: Motor Speech Disorders & Speech Motor Control, Feb 22 – 25, 2018, Savannah, Georgia

Karlsson, Fredrik; Karlsson, Marcus; Hartelius, Lena

Unilateral Left Deep Brain Stimulation of the Caudal Zona Incerta Is Equally Effective on Voice Tremor as Bilateral Stimulation: Evidence from 7 Patients with Essential Tremor

Stereotactic and Functional Neurosurgery, Vol. 96, (3) : 157-161

Sandström, Linda; Karlsson, Fredrik; Blomstedt, Patric

Kommunikations- och sväljstörningar genom hela livet: ett logopediskt ståndpunktsdokument

Umeå: Umeå universitet 2017

Lohmander, Anette; McAllister, Anita; Hansson, Kristina; et al.

Voice Tremor in Patients With Essential Tremor: Effects of Deep Brain Stimulation of Caudal Zona Incerta

Journal of Voice, Vol. 30, (2) : 228-233

Hägglund, Patricia; Sandström, Linda; Blomstedt, Patric; et al.

Perceived articulatory precision in patients with Parkinson’s disease after deep brain stimulation of subthalamic nucleus and caudal zona incerta

Clinical Linguistics & Phonetics, Vol. 29, (2) : 150-166

Eklund, Elisabeth; Qvist, Johanna; Sandström, Lena; et al.

Speech intelligibility in Parkinson's disease patients with zona incerta deep brain stimulation

Brain and Behavior, John Wiley & Sons 2015, Vol. 5, (10)

Sandström, Linda; Hägglund, Patricia; Johansson, Louise; et al.

Articulatory closure proficiency in Parkinson's disease patients following deep brain stimulation of the subthalamic nucleus and caudal zona incerta.

Journal of Speech, Language and Hearing Research, Vol. 57 : 1178-1190

Karlsson, Fredrik; Olofsson, Katarina; Blomstedt, Patric; et al.

Word-level intelligibility after caudal zona incerta stimulation for Parkinson’s disease

Acta Neurologica Scandinavica, Wiley-Blackwell 2014, Vol. 130, (1) : 27-33

Louise, Johansson; Sofia, Möller; Olofsson, Katarina; et al.

Influence of speech task and utterance length on the measurement of pitch variability in the speech of Parkinson's disease patients after deep brain stimulation

17th International Congress of Parkinson's disease and movement disorders

Doorn, Jan van; Karlsson, Fredrik

Pitch variability in patients with Parkinson’s disease: effects of deep brain stimulation of caudal zona incerta and subthalamic nucleus

Journal of Speech, Language and Hearing Research, American Speech-Language-Hearing Association 2013, Vol. 56, (1) : 150-158

Karlsson, Fredrik; Olofsson, Katarina; Blomstedt, Patric; et al.

Influence of speech task and utterance length on measurement of pitch variability in the speech of Parkinson's disease patients after deep brain stimulation

Movement Disorders, John Wiley & Sons 2013, Vol. 28, (Supplement 1) : S448-

van Doorn, Janis; Karlsson, Fredrik

Control of phonatory onset and offset in Parkinson patients following deep brain stimulation of the subthalamic nucleus and caudal Zona Incerta

Parkinsonism & Related Disorders, Elsevier 2012, Vol. 18, (7) : 824-827

Karlsson, Fredrik; Blomstedt, Patric; Olofsson, Katarina; et al.

Automatic acquisition of jitter and shimmer measurements across large sets of sustained vowel productions

Cork: 2012

Karlsson, Fredrik; Doorn, Jan van

Applying the Vowel Formant Dispersion (VFD) method to the study of reduced or alterered vowel productions

14th Meeting of the International Clinical Phonetics and Linguistics Association, Cork, Ireland, 27-Jun-2012 - 30-Jun-2012

Karlsson, Fredrik; Doorn, Jan van

Letter to the Editor

Journal of Voice, Elsevier 2012, Vol. 26, (5)

Karlsson, Fredrik; Doorn, Jan van

Vowel formant dispersion as a measure of articulation proficiency

Journal of the Acoustical Society of America, Acoustical Society of America (ASA) 2012, Vol. 132, (4) : 2633-2641

Karlsson, Fredrik; Doorn, Jan van

Treatment effects in voice onset time of plosives associated with deep brain stimulation of the subthalamic nucleus and the caudal zona incerta

Journal of medical speech-language pathology, Delmar Cengage Learning 2012, Vol. 20, (4) : 65-69

Karlsson, Fredrik; Unger, Elin; Wahlgren, Sofia; et al.

Deep brain stimulation of caudal zona incerta and subthalamic nucleus in patients with Parkinson’s disease: effects on diadochokinetic rate

Parkinson's Disease, Hindawi Publishing Corporation 2011, Vol. 2011 : 605607-

Karlsson, Fredrik; Unger, Elin; Wahlgren, Sofia; et al.

Deep brain stimulation of caudal zona incerta and subthalamic nucleus in patients with Parkinson’s disease: effects on voice intensity

Parkinson's Disease, Hindawi Publishing Corporation 2011, Vol. 2011 : 658956-

Lundgren, Sofie; Saeys, Thomas; Karlsson, Fredrik; et al.

Characterising the internal structure of learner intonation and its development over time

Proceedings of The 6th International Symposium on the Acquisition of Second Language Speech (Newsounds 2010)

Mennen, Ineke; Chen, Aujo; Karlsson, Fredrik

Language learning through fuzzy ears: one cause of identity loss? Some preliminary thoughts from an experimental case study

Tidskrift för lärarutbildning och forskning / Journal of Research in Teacher Education., Vol. 15, (2) : 23-37

Czigler, Peter E.; Karlsson, Fredrik; Poussa, Patricia; et al.

The acoustic manifestation of consonant gradation in Northern Sami

Journal of the Acoustical Society of America, Vol. 123, (5 (part 2)) : 3885-

Karlsson, Fredrik; Sullivan, Kirk P H; Svonni, Michael; et al.

An acoustic investigation of the Swedish child’s acquisition of obstruent place of articulation

Acoustics'08 Paris : June 29 - July 4, 2008, Paris: Société Française d'Acoustique (SFA) 2008 : 681-686

van Doorn, Jan; Karlsson, Fredrik; Sullivan, Kirk P. H.

Utveckling av Voice Onset Time hos svenska barn

Tionde Nordiska Barnspråkssymposiet, Gävle: Högskolan i Gävle 2006 : 69-75

Karlsson, Fredrik; Landgren, Tomas; Sullivan, Kirk P H

Kvantifiering av inlärning av tonande/tonlös kontrast med hjälp av Voice Onset Time

Tionde Nordiska Barnspråkssymposiet, Gävle: Högskolan i Gävle 2006 : 60-68

Karlsson, Fredrik; Sullivan, Kirk P H

Development of adult-like place and manner of articulation in initial sC clusters

Proceedings FONETIK 2005: XVIIIth Swedish Phonetics Conference : 71-74

Karlsson, Fredrik

Using Voice Onset Time for Estimating Production Maturity of /sP/ clusters

Proceedings from the X International Congress For the Study of Child Language : -

Karlsson, Fredrik; Czigler, Peter; Sullivan, Kirk P H

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