Establishment of vestibular function multimodality platform

Jheng, Ying Chun; Yu, Chung Huang; Chen, Po Yin; Cheng, Yuan-Yang; Lin, Tzu‐Chin; Huang, Shih-En; Liu, Ding Hao; Wang, Chien-Chih; Wei, Shun Hwa; Kao, Chung Lan

doi:10.1097/jcma.0000000000000065

Cited by 3 publications

(1 citation statement)

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“…Three IMUs (PNI SpacePoint SCOUT, USA) were placed, one on top of the head, one on the sternum, and one at the midpoint between the two anterior superior iliac spines and were used to measure the change in the angular motion of the head, chest and pelvis. This 9-axis IMU consists of a 3-axis accelerometer, a 3-axis gyroscope, and PNI's geomagnetic sensor suite, with a sampling rate of 125 Hz (35).…”

Section: Sensing Subsystemmentioning

confidence: 99%

Development of a Computerized Device for Evaluating Vestibular Function in Locomotion: A New Evaluation Tool of Vestibular Hypofunction

Chen

Chou²,

Jheng

et al. 2020

Front. Neurol.

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To evaluate vestibular function in the clinic, current assessments are applied under static conditions, such as with the subject in a sitting or supine position. Considering the complexities of daily activities, the combination of dynamic activities, dynamic visual acuity (DVA) and postural control could produce an evaluation that better reflects vestibular function in daily activities. Objective: To develop a novel sensor-based system to investigate DVA, walking trajectory, head and trunk movements and the chest-pelvis rotation ratio during forward and backward overground walking in both healthy individuals and patients with vestibular hypofunction. Methods: Fifteen healthy subjects and 7 patients with bilateral vestibular hypofunction (BVH) were recruited for this study. Inertial measurement units were placed on each subject's head and torso. Each subject walked forward and backward for 5 m twice with 2 Hz head yaw. Our experiment comprised 2 stages. In stage 1, we measured forward (FW), backward (BW), and medial-lateral (MLW) walking trajectories; head and trunk movements; and the chest-pelvis rotation ratio. In stage 2, we measured standing and locomotion DVA (loDVA). Using Mann-Whitney U-test, we compared the abovementioned parameters between the 2 groups. Results: Patients exhibited an in-phase chest/pelvis reciprocal rotation ratio only in FW. The walking trajectory deviation, calculated by normalizing the summation of medial-lateral swaying with 1/2 body height (%), was significantly larger (FW mean ± standard deviation: 20.4 ± 7.1% (median (M)/interquartile range (IQR): 19.3/14.4-25.2)in healthy vs. 43.9 ± 27. 3% (M/IQR: 36.9/21.3-56.9) in patients, p = 0.020)/(BW mean ± standard deviation: 19.2 ± 11.5% (M/IQR: 13.6/10.4-25.3) in healthy vs. 29.3 ± 6.4% (M/IQR: 27.7/26.5-34.4) in patients, p = 0.026), and the walking DVA was also significantly higher (LogMAR score in the patient group [FW LogMAR: rightDVA: mean ± standard deviation

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Section: Sensing Subsystemmentioning

confidence: 99%