Using complexity –entropy planes to detect Parkinson’s disease from short segments of haemodynamic
signals
Objective . There is emerging evidence that analysing the entropy and complexity of biomedical
signals can detect underlying changes in physiology which may be reflective of disease pathology.
This approach can be used even when only short recordings of biomedical signals are available. This
study aimed to determine whether entropy and complexity measures can detect differences between
subjects with Parkinsons disease and healthy controls (HCs). Approach . A method based on a diagram
of entropy versus complexity, named complexity –entropy plane, was used to re-analyse a dataset of
cerebral haemodynamic signals from...
Source: Physiological Measurement - August 26, 2021 Category: Physiology Authors: J L Jara, Catalina Morales-Rojas, Juan Fern ández-Muñoz, Victoria J Haunton and Max Chacón Source Type: research
Improvement of exhausted cerebral autoregulation in patients with idiopathic intracranial
hypertension benefit of venous sinus stenting
Objective. To evaluate the cerebral autoregulation (CA) in idiopathic intracranial hypertension
(IIH) patients with transfer function analysis, and to explore its improvement after venous sinus
stenting. Approach . In total, 15 consecutive IIH patients with venous sinus stenosis and 15
controls were recruited. All the patients underwent digital subtraction angiography and venous
manometry. Venous sinus stenting was performed for IIH patients with a trans-stenosis pressure
gradient ≥8 mmHg. CA was assessed before and after the operation with transfer function analysis, by
using the spontaneous oscillations of the ce...
Source: Physiological Measurement - August 26, 2021 Category: Physiology Authors: Jie Chen, Pei Dong, Kehui Dong, Dapeng Mo, Yilong Wang, Xingquan Zhao, Yongjun Wang and Xiping Gong Source Type: research
The use of infrared thermography for the dynamic measurement of skin temperature of moving athletes
during competition; methodological issues
Objective . To investigate the use of infrared thermography (IRT) for skin temperature measurement
of moving athletes during competition and its sensitivity to factors that are traditionally
standardised. Approach . Thermograms were collected for 18 female athletes during the 20 km racewalk
at the 2019 World Athletics Championships, with a medium-wave, cooled indium antimonide medium wave
infrared band (MWIR) and a long-wave, uncooled microbolometer longwave infrared band (LWIR) infrared
camera. Main results . The MWIR provided greater clarity images of motion due to a shorter exposure
and response time and produced ...
Source: Physiological Measurement - August 26, 2021 Category: Physiology Authors: Polly E Aylwin, Sebastien Racinais, St éphane Bermon, Alex Lloyd, Simon Hodder and George Havenith Source Type: research
How is the phase angle associated with total and regional bone mineral density in university
athletes? *
Objective. To investigate how phase angle (PhA) is associated with total and regional bone mineral
density (BMD) (femur and lumbar spine) in university athletes. Approach. This cross-sectional study
was conducted in Florian ópolis, Brazil, with 167 university athletes from different sports (92
males). The PhA was obtained through electrical bioimpedance and BMD was obtained through dual x-ray
absorptiometry (DXA). Data on the covariables age, time involved in the sport, type of sport (low,
medium and high impact), daily use of oral contraceptives, and vitamin D calcium and/or protein
supplementation were obtained th...
Source: Physiological Measurement - August 26, 2021 Category: Physiology Authors: Priscila Cust ódio Martins, Mikael Seabra Moraes and Diego Augusto Santos Silva Source Type: research
The interplay between heated environment and active standing test on cardiovascular autonomic
control in healthy individuals
Objective. To investigate the interplay between active standing and heat stress on cardiovascular
autonomic modulation in healthy individuals. Approach. Blood pressure (BP) and ECG were continuously
recorded during 30 min in supine (SUP) and 6 min in orthostatic position (ORT) under thermal
reference (TC; ∼24 °C) or heated environment (HOT; ∼36 °C) conditions, in a randomized order. All
data collection was performed during the winter and spring seasons when typical outdoor temperatures
are ∼23 °C. Spectral analysis was employed by the autoregressive model of R–R and systolic blood
pressure (SBP) time serie...
Source: Physiological Measurement - August 26, 2021 Category: Physiology Authors: Felipe Castro Ferreira, Michelle Cristina Salabert Vaz Padilha, Eleonora Tobadini, Angelica Carandina, Nicola Montano, Pedro Paulo da Silva Soares and Gabriel Dias Rodrigues Source Type: research
