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- Title
Functional Near-Infrared Spectroscopy in the Study of Speech and Language Impairment Across the Life Span: A Systematic Review.
- Authors
Butler, Lindsay K.; Kiran, Swathi; Tager-Flusberg, Helen
- Abstract
Purpose: Functional brain imaging is playing an increasingly important role in the diagnosis and treatment of communication disorders, yet many populations and settings are incompatible with functional magnetic resonance imaging and other commonly used techniques. We conducted a systematic review of neuroimaging studies using functional nearinfrared spectroscopy (fNIRS) with individuals with speech or language impairment across the life span. We aimed to answer the following question: To what extent has fNIRS been used to investigate the neural correlates of speechlanguage impairment? Method: This systematic review was preregistered with PROSPERO, the international prospective register of systematic reviews (CRD42019136464). We followed the Preferred Reporting Items for Systematic Reviews and Meta- Analyses (PRISMA) protocol for preferred reporting items for systematic reviews. The database searches were conducted between February and March of 2019 with the following search terms: (a) fNIRS or functional near-infrared spectroscopy or NIRS or near-infrared spectroscopy, (b) speech or language, and (c) disorder or impairment or delay. Results: We found 34 fNIRS studies that involved individuals with speech or language impairment across nine categories: (a) autism spectrum disorders; (b) developmental speech and language disorders; (c) cochlear implantation and deafness; (d) dementia, dementia of the Alzheimer's type, and mild cognitive impairment; (e) locked-in syndrome; (f) neurologic speech disorders/dysarthria; (g) stroke/aphasia; (h) stuttering; and (i) traumatic brain injury. Conclusions: Though it is not without inherent challenges, fNIRS may have advantages over other neuroimaging techniques in the areas of speech and language impairment. fNIRS has clinical applications that may lead to improved early and differential diagnosis, increase our understanding of response to treatment, improve neuroprosthetic functioning, and advance neurofeedback.
- Subjects
SPEECH therapy; LANGUAGE disorder diagnosis; TREATMENT of language disorders; SPEECH disorder diagnosis; REACTIVE oxygen species; ALZHEIMER'S disease; APHASIA; AUTISM; PHYSIOLOGICAL control systems; BRAIN injuries; COCHLEAR implants; COGNITION disorders; DEAFNESS; DEMENTIA; DYSARTHRIA; PSYCHOLOGY information storage &; retrieval systems; MEDLINE; NEAR infrared spectroscopy; ONLINE information services; OXYGEN in the body; STROKE; STUTTERING; SYSTEMATIC reviews; MEDICAL artifacts; LOCKED-in syndrome
- Publication
American Journal of Speech-Language Pathology, 2020, Vol 29, Issue 3, p1674
- ISSN
1058-0360
- Publication type
Article
- DOI
10.1044/2020_AJSLP-19-00050