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Shirley Ryan AbilityLab

2 ARTICLES PUBLISHED IN JoVE

Behavior

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Alexandre Nikolaev¹, Eve Higby^2,3, JungMoon Hyun⁴, Sameer Ashaie^5,6

¹Helsinki Collegium for Advanced Studies, University of Helsinki, ²University of California, Riverside, ³California State University, East Bay, ⁴Hunter College, City University of New York, ⁵Feinberg School of Medicine, Northwestern University, ⁶Shirley Ryan AbilityLab

This article describes how to implement a simple lexical decision experiment to assess written word recognition in neurologically healthy participants and in individuals with dementia and cognitive decline. We also provide a detailed description of reaction time analysis using principal components analysis (PCA) and mixed-effects modeling.

JoVE Core

Obtaining Quality Extended Field-of-View Ultrasound Images of Skeletal Muscle to Measure Muscle Fascicle Length

Amy N. Adkins^1,4,5, Wendy M. Murray^1,2,3,4,5

¹Department of Biomedical Engineering, Northwestern University, ²Department of Physical Medicine & Rehabilitation, Northwestern University Feinberg School of Medicine, ³Department of Physical Therapy and Human Movement Sciences, Northwestern University Feinberg School of Medicine, ⁴Shirley Ryan AbilityLab, ⁵Edward Hines, Jr. VA Hospital

This study describes how to obtain high quality musculoskeletal images using the extended field-of-view ultrasound (EFOV-US) method for the purpose of making muscle fascicle length measures. We apply this method to muscles with fascicles that extend past the field-of-view of common traditional ultrasound (T-US) probes.