Early Postural Changes in Individuals with Idiopathic Parkinson’s Disease

Abstract

Background and Objectives. Postural changes are frequent and disabling complications of Parkinson's disease (PD). Many contributing factors have been evident either related to disease pathology or to adaptive changes. This study aimed at studying the postural changes in subjects with Parkinson's disease and its relation to duration of illness and disease severity. Methods. Eighteen patients with PD and 18 healthy matched volunteers represented the sample of the study. The patients were at stage 1 or 1.5 according to the Modified Hoehn and Yahr Staging with duration of illness between 18 and 36 months. Three-dimensional analysis of the back surface was conducted to explore the postural changes in the sagittal and frontal planes in both the patients and the healthy subjects. Results. Kyphotic angle, lordotic angle, fleche cervicale, fleche lombaire, scoliotic angle, and associated vertebral rotation and pelvic obliquity were significantly increased in patients with PD compared to the healthy subjects (P ≤ 0.05). There was no association between the measured postural changes and duration of illness as well as the severity of the IPD (P ≤ 0.05). Conclusion. Postural changes start in the early stages of idiopathic PD and they have no relationship to the duration of illness and disease severity.

Instrumented Test of Sensory Integration for Balance: A Validation Study

“…We also explored the ability of the SOT and i-mCTSIB to identify individuals with subtle impairments as defined by Hoehn and Yahr (H&Y) scores. 27,28 A score of 1 and 2 is indicative of mild postural instability while 3 and 4 indicates moderate postural instability, as defined by an abnormal stepping response to a backwards pull on the shoulders. Similarly, we examined the ability of SOT to identify individuals with impaired sway as defined by established cut scores (normal sway = > 69 and abnormal = ˂ 69).…”

Avaliação Postural Em Pessoas Com Doença De Parkinson: Estado Da Arte

“…Khallaf e Fayed, (18) por meio da análise dimensional da coluna de parkinsonianos encontraram anormalidades posturais nos planos frontal (escoliose, desequilíbrio coronal e pelve oblíqua) e sagital (hipercifose). Outras alterações posturais evidenciadas pelo estudo tais como hiperlordose, flexão cervical e rotações vertebrais foram significativamente maiores em parkinsonianos; a magnitude dos ângulos destas alterações também foi mais elevada em relação aos controles saudáveis.…”

“…Supõe--se que estas alterações estejam relacionadas a sintomas como rigidez axial ou distonia, o que pode prejudicar a percepção do ângulo corporal destes indivíduos. (18) A postura corporal é um fenômeno complexo e depende da habilidade e experiência do avaliador, pois, a análise da postura pela inspeção visual pode não apresentar fidedignidade e confiabilidade dos seus resultados quando se comparam os achados entre examinadores. (11,19) No presente estudo foi constatado que o método mais utilizado para analisar a postura compreende a avaliação subjetiva.…”

“…Um recurso que também pode ser utilizado para a análise da postura é a fotogrametria; esta é descrita como um método que apresenta maior consistên-cia intra e inter avaliadores, sendo a mais indicada para avaliação e acompanhamento de intervenções terapêuticas. (18) Os estudos que realizaram a análi-se objetiva da postura podem ter maior confiabilidade no que se refere aos achados nos desvios da postura dos pacientes com DP.…”

Machine Learning and Explainable Artificial Intelligence using Counterfactual Explanations for Evaluating Posture Parameters

“…Subject characteristics were included as features for modelling. Based on the measured raw data for distance C7-S1, c-spine, t-spine, and l-spine (see Figure 1), the feature kyphosis index (KI), flèche cervicale (FC), and flèche lombaire (FL) were calculated, as they are commonly used for posture evaluations [33,34]. Further, these calculated features were normalized by the distance between C7 and S1 (corresponding to the subjects' trunk heights) to allow better comparability between subjects (hereinafter abbreviated as KI%, FC%, and FL%).…”