Naoki Itoh, RPT, DMSc, Hitoshi Kagaya, MD, DMSc, Kazumi Horio, RPT, MS, Kazuaki
Hori, RPT, Norihide Itoh, RPT, DMSc, Kikuo Ota, MD, DMSc, Yoshikiyo Kanada, RPT, DMSc,
Eiichi Saitoh, MD, DMSc
Jpn J Compr Rehabil Sci 3: 66-71, 2012
Objective: To elucidate the relationship between side-to-side asymmetry and sit-to-stand and stand-to-sit
duration in patients with right or left hemiplegia by
three-dimensional motion analysis of the two
movements.
Methods: Forty-five patients with hemiplegia (right
hemiplegia in 21, left hemiplegia in 24) and 20 normal
healthy adults were studied. Using three-dimensional
motion analysis, an asymmetry index (AI) was
calculated from the trajectory of the left-right
component at the midpoint between two acromion
markers as a function of time. Normal range of the sit-to-stand and stand-to-sit duration was calculated as the
mean ± SD obtained from normal subjects. Patients
were divided into two groups according to duration:
normal duration (within the mean ± 2SD of normal
subjects) and abnormal duration (outside the mean ±
2SD of normal subjects). Motor function of the affected
lower extremity and other parameters were compared
between the normal and abnormal duration groups.
Results: Sit-to-stand and stand-to-sit duration was
significantly prolonged in both right hemiplegic and
left hemiplegic patients compared with normal
subjects. In left hemiplegic patients, AI was
significantly higher in those with abnormal duration
for both sit-to-stand and stand-to-sit movements. In
left hemiplegic patients, the lower extremity motor
function was significantly poorer in those with
abnormal duration for sit-to-stand movement.
Conclusion: In patients with left hemiplegia, AI
deviates toward the unaffected side, and impaired
lower extremity motor function is associated with
prolonged sit-to-stand duration.
Key words: sit-to-stand and stand-to-sit motion analysis, sit-to-stand and stand-to-sit duration, asymmetry, asymmetry index