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How To Save A Life

By J.D. Mai 20, 2024

Der Vogel und der Fuchs

By J.D. Dezember 13, 2023

Universum 25: Ein Blick in die dystopische Welt von John Calhouns Ratten-Utopie bei sozialem Dichtestress

By J.D. Oktober 15, 2023

Polemik bringt uns in der Gesundheitsdebatte nicht weiter

By J.D. Oktober 3, 2023

Vom Suchen

By J.D. Januar 14, 2023

Wandel im Gesundheitssystem Teil 1: Symptom- und Ursachenbekämpfung. Ein Appell an die Prävention.

By J.D. Dezember 31, 2022

Friluftsliv

By J.D. September 19, 2022

Resistentia der Gezeiten

By J.D. Juli 2, 2022
Black hole bounce

Big Bang || Big Bounce

By J.D. März 27, 2022

Cycle II: it’s not only your own horny cycle

By J.D. November 29, 2021

Monomorphe Kraft

By J.D. September 23, 2021

Die Unbekannte

By J.D. Dezember 3, 2020

Gedanken eines Reisenden

By J.D. Februar 23, 2019

Zyklus

By J.D. Dezember 28, 2018

Fehlerhaft

By J.D. Dezember 10, 2018

Glas

By J.D. April 14, 2015

  • new .publications

    Authors: Nina Ellrich, Kasimir Niermeyer, Daniela Peto, Julian Decker, Urban M Fietzek, Sabrina Katzdobler, Günter U Höglinger, Klaus Jahn, Andreas Zwergal, Max Wuehr

    Precision Balance Assessment in Parkinson’s Disease: Utilizing Vision-Based 3D Pose Tracking for Pull Test Analysis

    - 2024 - Sensors, vol. 24, p. 3673

    Abstract : Postural instability is a common complication in advanced Parkinson’s disease (PD) associated with recurrent falls and fall-related injuries. The test of retropulsion, consisting of a rapid balance perturbation by a pull in the backward direction, is regarded as the gold standard for evaluating postural instability in PD and is a key component of the neurological examination and clinical rating in PD (e.g., MDS-UPDRS). However, significant variability in test execution and interpretation contributes to a low intra- and inter-rater test reliability. Here, we explore the potential for objective, vision-based assessment of the pull test (vPull) using 3D pose tracking applied to single-sensor RGB-Depth recordings of clinical assessments. The initial results in a cohort of healthy individuals (n = 15) demonstrate overall excellent agreement of vPull-derived metrics with the gold standard marker-based motion capture. Subsequently, in a cohort of PD patients and controls (n = 15 each), we assessed the inter-rater reliability of vPull and analyzed PD-related impairments in postural response (including pull-to-step latency, number of steps, retropulsion angle). These quantitative metrics effectively distinguish healthy performance from and within varying degrees of postural impairment in PD. vPull shows promise for straightforward clinical implementation with the potential to enhance the sensitivity and specificity of postural instability assessment and fall risk prediction in PD. ... read on

    Authors: Julian Decker, Lukas Boborzi, Roman Schniepp, Klaus Jahn, Max Wuehr

    Mobile spatiotemporal gait segmentation using an ear-worn motion sensor and deep learning

    - 2024 - Sensors (Basel, Switzerland), vol. 24, p. 6442

    Abstract : Mobile health technologies enable continuous, quantitative assessment of mobility and gait in real-world environments, facilitating early diagnoses of gait disorders, disease progression monitoring, and prediction of adverse events like falls. Traditionally, mobile gait assessment predominantly relied on body-fixed sensors positioned at the feet or lower trunk. Here, we investigate the potential of an algorithm utilizing an ear-worn motion sensor for spatiotemporal segmentation of gait patterns. We collected 3D acceleration profiles from the ear-worn sensor during varied walking speeds in 53 healthy adults. Temporal convolutional networks were trained to detect stepping sequences and predict spatial relations between steps. The resulting algorithm, mEar, accurately detects initial and final ground contacts (F1 score of 99% and 91%, respectively). It enables the determination of temporal and spatial gait cycle … ... read on

    Authors: Lukas Boborzi, Julian Decker, Razieh Rezaei, Roman Schniepp, Max Wuehr

    Human activity recognition in a free-living environment using an ear-worn motion sensor

    - 2024 - Sensors, vol. 24, p. 2665

    Abstract : Human activity recognition (HAR) technology enables continuous behavior monitoring, which is particularly valuable in healthcare. This study investigates the viability of using an ear-worn motion sensor for classifying daily activities, including lying, sitting/standing, walking, ascending stairs, descending stairs, and running. Fifty healthy participants (between 20 and 47 years old) engaged in these activities while under monitoring. Various machine learning algorithms, ranging from interpretable shallow models to state-of-the-art deep learning approaches designed for HAR (i.e., DeepConvLSTM and ConvTransformer), were employed for classification. The results demonstrate the ear sensor’s efficacy, with deep learning models achieving a 98% accuracy rate of classification. The obtained classification models are agnostic regarding which ear the sensor is worn and robust against moderate variations in sensor orientation (e.g., due to differences in auricle anatomy), meaning no initial calibration of the sensor orientation is required. The study underscores the ear’s efficacy as a suitable site for monitoring human daily activity and suggests its potential for combining HAR with in-ear vital sign monitoring. This approach offers a practical method for comprehensive health monitoring by integrating sensors in a single anatomical location. This integration facilitates individualized health assessments, with potential applications in tele-monitoring, personalized health insights, and optimizing athletic training regimes. ... read on

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