40 research outputs found
ghammad/pyActigraphy: Release candidate for v1.0
No full textThis release candidate includes all the features foreseen for the v1.0 release.
It will also serve as a basis, after potential bug fixes, for the v1.0 release which will be documented in the companion paper which is about to be submitted
pyActigraphy
Get PDFOpen-source python package for actigraphy data analysis.
This package is meant to provide a comprehensive set of tools to:
read actigraphy raw data files with various formats
calculate typical wake/sleep cycle-related variables (ex: IS, IV, …)
perform complex analyses (ex: FDA, SSA, HMM, …)Open-source python package for actigraphy data analysis
Les dragons de la crue
Get PDFS'appuyant sur quelques légendes de dragons occidentaux et les cérémonies qui leur sont associées, l'auteur recherche, à travers la symbolique du serpent, la signification de cette image rémanente et propose une nouvelle interprétation : celle d'une image profane de l'eau vive destinée à illustrer le comportement de celle-ci et à entretenir la conscience de la crue au sein de la société, tout en exorcisant l'angoisse de cette dernière par la fête et le masque. En guise de conclusion, l'auteur pose la question du rôle des images, en marge des concepts et des théories scientifiques, dans la pédagogie de l'environnement et le rapport de l'homme au milieu.Through some legends of western dragons and the associated ceremonies, the author searches in the symbolic of the snake the significance of this image, in order to suggest a new interpretation: a profane image of the running water illustrating its mechanism and maintaining the conscience of the floods within society, while exorcising its anguish by the feast and the mask. In conclusion, the author points out the part of images, with the scientific concepts and theories, in the pedagogy of the environment and the relationship between man and the environment
pyActigraphy: Open-source python package for actigraphy data visualization and analysis
No full text<p>Open-source python package for actigraphy data analysis.</p>
<p>This package is meant to provide a comprehensive set of tools to:</p>
<ul>
<li>read actigraphy raw data files with various formats</li>
<li>calculate typical wake/sleep cycle-related variables (ex: IS, IV, …)</li>
<li>perform complex analyses (ex: FDA, SSA, HMM, …)</li>
</ul>
<p>Happy actigraphying!</p>
ghammad/pyActigraphy: Actigraphy made simple!
No full textOpen-source python package for actigraphy data analysis.
This package is meant to provide a comprehensive set of tools to:
read actigraphy raw data files with various formats
calculate typical wake/sleep cycle-related variables (ex: IS, IV, …)
perform complex analyses (ex: FDA, SSA, HMM, …)
Happy actigraphying!</p
pyActigraphy: Actigraphy made simple!
No full textThis first official release includes all the features documented in the companion paper which has been submitted to the SoftwareX journal.
Happy actigraphing
Association between circadian sleep regulation and cortical gyrification in young and older adults.
Get PDFThe circadian system orchestrates sleep timing and structure and is altered with increasing age. Sleep propensity, and particularly REM sleep is under strong circadian control and has been suggested to play an important role in brain plasticity. In this exploratory study, we assessed whether surface-based brain morphometry indices are associated with circadian sleep regulation and whether this link changes with age. Twenty-nine healthy older (55-82 years; 16 men) and 28 young participants (20-32 years; 13 men) underwent both structural magnetic resonance imaging and a 40-h multiple nap protocol to extract sleep parameters over day and night time. Cortical thickness and gyrification indices were estimated from T1-weighted images acquired during a classical waking day. We observed that REM sleep was significantly modulated over the 24-h cycle in both age groups, with older adults exhibiting an overall reduction in REM sleep modulation compared to young individuals. Interestingly, when taking into account the observed overall age-related reduction in REM sleep throughout the circadian cycle, higher day-night differences in REM sleep were associated with increased cortical gyrification in the right inferior frontal and paracentral regions in older adults. Our results suggest that a more distinctive allocation of REM sleep over the 24-h cycle is associated with regional cortical gyrification in aging, and thereby point towards a protective role of circadian REM sleep regulation for age-related changes in brain organization
Association between sleep slow-wave activity and in-vivo estimates of myelin in healthy young men
Get PDFSleep has been suggested to contribute to myelinogenesis and associated structural changes in the brain. As a principal hallmark of sleep, slow-wave activity (SWA) is homeostatically regulated but also differs between individuals. Besides its homeostatic function, SWA topography is suggested to reflect processes of brain maturation. Here, we assessed whether interindividual differences in sleep SWA and its homeostatic response to sleep manipulations are associated with in-vivo myelin estimates in a sample of healthy young men. Two hundred twenty-six participants (18–31 y.) underwent an in-lab protocol in which SWA was assessed at baseline (BAS), after sleep deprivation (high homeostatic sleep pressure, HSP) and after sleep saturation (low homeostatic sleep pressure, LSP). Early-night frontal SWA, the frontal-occipital SWA ratio, as well as the overnight exponential SWA decay were computed over sleep conditions. Semi-quantitative magnetization transfer saturation maps (MTsat), providing markers for myelin content, were acquired during a separate laboratory visit. Early-night frontal SWA was negatively associated with regional myelin estimates in the temporal portion of the inferior longitudinal fasciculus. By contrast, neither the responsiveness of SWA to sleep saturation or deprivation, its overnight dynamics, nor the frontal/occipital SWA ratio were associated with brain structural indices. Our results indicate that frontal SWA generation tracks inter-individual differences in continued structural brain re-organization during early adulthood. This stage of life is not only characterized by ongoing region-specific changes in myelin content, but also by a sharp decrease and a shift towards frontal predominance in SWA generation
pyActigraphy, an open-source python package for actigraphy data visualisation and analysis
Get PDFThe pyActigraphy toolbox, an open-source python package for actigraphy data visualisation and analysis, offers functionalities to automatise data pre-processing, read large file batches and implement various metrics and techniques for actigraphy data analysis.
By developing the pyActigraphy package, we not only hope to facilitate data analysis but also foster research using actimetry and drive a community effort to improve this open-source package and develop new variables and algorithms.COGNA
pyActigraphy: Open-source python package for actigraphy data visualization and analysis
No full text<p>This release aims to fix:</p>
<ul>
<li>Biobank Accelerometer Analysis file format: support file paths containing numerical characters and/or whitespaces;</li>
<li>Actiwatch (CamNtech) file format: fix <a href="https://github.com/ghammad/pyActigraphy/issues/123">issue #123</a> by upper casing the UUID.</li>
<li>Batch reader: add missing types, 'BBA' and 'MESA'.</li>
</ul>If you use this software, please cite it as below
