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Measurement and Correction of Stooped Posture during Gait Using Wearable Sensors in Patients with Parkinsonism: A Preliminary Study

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Abstract
Stooped posture, which is usually aggravated during walking, is one of the typical postural
deformities in patients with parkinsonism. However, the degree of stooped posture is difficult to
quantitatively measure during walking. Furthermore, continuous feedback on posture is also difficult
to provide. The purpose of this study is to measure the degree of stooped posture during gait and
to investigate whether vibration feedback from sensor modules can improve a patient’s posture.
Parkinsonian patients with stooped posture were recruited for this study. Two wearable sensors
with three-axis accelerometers were attached, one at the upper neck and the other just below the
C7 spinous process of the patients. After being calibrated in the most upright posture, the sensors
continuously recorded the sagittal angles at 20 Hz and averaged the data at every second during a
6 min walk test. In the control session, the patients walked with the sensors as usual. In the vibration
session, sensory feedback was provided through vibrations from the neck sensor module when
the sagittal angle exceeded a programmable threshold value. Data were collected and analyzed
successfully in a total of 10 patients. The neck flexion and back flexion were slightly aggravated
during gait, although the average change was <10?
in most patients in both measurement sessions.
Therefore, it was difficult to evaluate the effect of sensory feedback through vibration. However,
some patients showed immediate response to the feedback and corrected their posture during gait.
In conclusion, this preliminary study suggests that stooped posture could be quantitatively measured
during gait by using wearable sensors in patients with parkinsonism. Sensory feedback through
vibration from sensor modules may help in correcting posture during gait in selected patients.
Author(s)
김세훈윤서정당 쿽 칸지영준정선근오병모김기원서한길
Issued Date
2021
Type
Article
Keyword
postureneurologic disordersbiomechanicsgait/balance
DOI
10.3390/s21072379
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8924
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_24b474e0ce7045dfa8c18526ace3a203&amp;context=PC&amp;vid=ULSAN&amp;lang=ko_KR&amp;search_scope=default_scope&amp;adaptor=primo_central_multiple_fe&amp;tab=default_tab&amp;query=any,contains,Measurement%20and%20Correction%20of%20Stooped%20Posture%20during%20Gait%20Using%20Wearable%20Sensors%20in%20Patients%20with%20Parkinsonism:%20A%20Preliminary%20Study&amp;offset=0&amp;pcAvailability=true
Publisher
SENSORS
Location
스위스
Language
영어
ISSN
1424-8220
Citation Volume
21
Citation Number
7
Citation Start Page
2379
Citation End Page
2379
Appears in Collections:
Engineering > Medical Engineering
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