Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/32443

TitlePostural stability analysis with inertial measurement units in alzheimer’s disease
Author(s)Gago, Miguel
Fernandes, Vitor
Ferreira, Jaime
Silva, Hélder
Rocha, Luís Alexandre Machado
Bicho, E.
Sousa, Nuno
KeywordsAlzheimer's disease
Postural stability
Inclined surface
Inertial measurement unit
Triaxial accelerometer and gyroscope
Issue date2014
PublisherKarger AG
JournalDementia Geriatric Cognitive Disorders Extra
Abstract(s)BACKGROUND: The cause of frequent falls in patients with Alzheimer's disease (AD) is still not well understood. Nevertheless, balance control and sensory organization are known to be critical for moving safely and adapting to the environment. METHODS: We evaluated postural stability in 20 AD patients (11 fallers and 9 nonfallers) and 16 healthy controls with an inertial measurement unit (triaxial accelerometers and gyroscopes) attached to the center of mass (COM) in different balance conditions (Romberg on flat surface and frontward/backward-inclined surface, with or without visual suppression) in a motor lab. RESULTS: In AD patients, the group of fallers showed a different kinetic pattern of postural stability characterized by higher vulnerability to visual suppression, higher total/maximal displacement and a mediolateral/anteroposterior range of sway, and a consequent need for more corrections of COM pitch and roll angles. CONCLUSION: Further studies are needed to consolidate the normative values of the discriminatory kinetic variables with the potential of inclusion in a multifactorial analysis of the risk of falls. Nevertheless, these results highlight signs of impairment of central postural control in AD, which may require early therapeutic intervention.
TypeArticle
URIhttp://hdl.handle.net/1822/32443
DOI10.1159/000357472
ISSN1664-5464
Publisher versionhttp://www.karger.com
Peer-Reviewedyes
AccessOpen access
Appears in Collections:ICVS - Artigos em Revistas Internacionais com Referee

Files in This Item:
File Description SizeFormat 
gago mf_dement geriatr cogn disord extra 2014.pdf1,13 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID