Objective: To develop a method to characterize Floor Sitting Rising (FSR) in people with Parkinson disease (PwP).

Background:

Transitioning to the floor to a seated position and then rising to stand (FSR) is vital for routine daily tasks. PwP in the early stages have prolonged floor transfer time compared to age-matched peers [1],[2]. FSR requires mobility of all body segments and can be performed using multiple strategies. Investigating the spatiotemporal characteristics of FSR may reveal early motor impairments in PD.

Method:

Young adults (YA) and PwP were recruited and were instructed to perform FSR comfortably using their preferred movement strategy. The trunk segment was tracked using 3D motion capture to measure task and FSR phases’ time, peak, and time-to-peak velocity. A smoothness score was calculated from the velocity profile (i.e. frequency of valley-peak-valley above a 20% line of the highest peak velocity amplitude). A higher frequency indicated less smoothness [3].

Results:

Eight young adults (YA) (age ± SD:29.7±8.5) and three early-stage PwP [(age±SD: 61.6 ± 2.8) participated in the study to date. A PwP in H&Y-I reported participating in light physical activity (PDL), a PwP in H&Y-II (PDH1), and a PwP in H&Y-I (PDH2) reported moderate to vigorous physical activity. The total duration to perform FSR (s) was the longest in PDL (PDL: 6.5 +0.3; PDH-1: 5.3+1.5; PDH2: 5.8+0.2; YA: 5.26+0.7). Peak velocity (mm/s) (PDH1: 2257.2+101.3; PDH2: 2062.6+30.9; PDL: 2159.3 + 133.2; YA: 2320.3+ 192.1) and time to peak (s) (PDH1: 4.7 + 1.5; PDH2: 4.4+0.2, PDL: 5.6+0.2; YA: 3.2+1.9) of the trunk segment were similar in PDH and YA. The two PDH participants used a similar FSR movement strategy but showed different smoothness scores (median, range)(PDH1:16, 15-19; PDH2:10, 6-10; PDL:14, 10-14).

Conclusion:

The study is a preliminary exploration of the spatiotemporal characteristics in three PwP. Disease stage and activity levels may have different influences on FSR spatiotemporal characteristics. In this case series, early-stage PwP who were physically active could perform FSR similar to YA. FSR spatiotemporal characteristics have the potential to become a mobility marker for investigating disease stage and may be influenced by physical activity.

References: [1] A. Basit, M. Noohu, F. R. Khan, and M. F. Chevidikunnan.“Reliability and validity of floor transfer test in subjects with idiopathic Parkinson’s disease.” Neurology Asia, Aug. 2020.

[2] T. Shafir, R. Angulo-Barroso, J. Su, S. W. Jacobson, and B. Lozoff. “Iron deficiency anemia in infancy and reach and grasp development – ScienceDirect.” Infant Behavior & Development 32, no. 4: 366–75, Dec. 2009. doi: https://doi.org/10.1016/j.infbeh.2009.06.002.

[3] C. P. Da Cunha, P. T. Rao, and S. Karthikbabu, “Clinical features contributing to the sit-to-stand transfer in people with Parkinson’s disease: a systematic review,” Egypt J Neurol Psychiatry Neurosurg, vol. 57, no. 1, p. 143, Oct. 2021, doi: 10.1186/s41983-021-00396-z.

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MDS Abstracts - https://www.mdsabstracts.org/abstract/the-spatiotemporal-characteristics-of-floor-sitting-rising-in-parkinsons-disease-pd/