Boston University Libraries OpenBU
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    •   OpenBU
    • BU Open Access Articles
    • BU Open Access Articles
    • View Item
    •   OpenBU
    • BU Open Access Articles
    • BU Open Access Articles
    • View Item

    Effects of Parkinson’s disease on optic flow perception for heading direction during navigation

    Thumbnail
    Date Issued
    2014
    Publisher Version
    10.1007/s00221-014-3853-9
    Author(s)
    Lin, Cheng-Chieh
    Wagenaar, Robert C.
    Young, Daniel
    Saltzman, Elliot L.
    Ren, Xiaolin
    Neargarder, Sandy
    Cronin-Golomb, Alice
    Share to FacebookShare to TwitterShare by Email
    Export Citation
    Download to BibTex
    Download to EndNote/RefMan (RIS)
    Metadata
    Show full item record
    Permanent Link
    https://hdl.handle.net/2144/34397
    Version
    Published version
    Citation (published version)
    C Lin, RC Wagenaar, D Young, EL Saltzman, X Ren, S Neargarder, A Cronin-Golomb. 2014. "Effects of Parkinson’s disease on optic flow perception for heading direction during navigation." Experimental brain research, Volume 232, Issue 4, pp. 1343 - 1355. https://doi.org/10.1007/s00221-014-3853-9
    Abstract
    Visuoperceptual disorders have been identified in individuals with Parkinson’s disease (PD) and may affect the perception of optic flow for heading direction during navigation. Studies in healthy subjects have confirmed that heading direction can be determined by equalizing the optic flow speed (OS) between visual fields. The present study investigated the effects of PD on the use of optic flow for heading direction, walking parameters, and interlimb coordination during navigation, examining the contributions of OS and spatial frequency (dot density). Twelve individuals with PD without dementia, 18 age-matched normal control adults (NC), and 23 young control adults (YC) walked through a virtual hallway at about 0.8 m/s. The hallway was created by random dots on side walls. Three levels of OS (0.8, 1.2, and 1.8 m/s) and dot density (1, 2, and 3 dots/m2) were presented on one wall while on the other wall, OS and dot density were fixed at 0.8 m/s and 3 dots/m2, respectively. Three-dimensional kinematic data were collected, and lateral drift, walking speed, stride frequency and length, and frequency, and phase relations between arms and legs were calculated. A significant linear effect was observed on lateral drift to the wall with lower OS for YC and NC, but not for PD. Compared to YC and NC, PD veered more to the left under OS and dot density conditions. The results suggest that healthy adults perceive optic flow for heading direction. Heading direction in PD may be more affected by the asymmetry of dopamine levels between the hemispheres and by motor lateralization as indexed by handedness.
    Collections
    • SAR: Physical Therapy & Athletic Training: Scholarly Papers [52]
    • CAS: Psychological and Brain Sciences: Scholarly Papers [232]
    • BU Open Access Articles [3730]


    Boston University
    Contact Us | Send Feedback | Help
     

     

    Browse

    All of OpenBUCommunities & CollectionsIssue DateAuthorsTitlesSubjectsThis CollectionIssue DateAuthorsTitlesSubjects

    Deposit Materials

    LoginNon-BU Registration

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Boston University
    Contact Us | Send Feedback | Help