scholarly journals Behavioural biometrics: Using smartphone keyboard activity as a proxy for rest–activity patterns

2021 ◽  
Author(s):  
Gerrieke B. Druijff‐van de Woestijne ◽  
Hannah McConchie ◽  
Yvonne A. W. Kort ◽  
Giovanni Licitra ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Activity Patterns ◽  
Behavioural Biometrics ◽  
Rest Activity

scholarly journals 248 Behavioural Biometrics: Using Smartphone Keyboard Activity as a Proxy for Rest-Activity Patterns

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A100-A100
Author(s):  
Gerrieke Druijff-van de Woestijne ◽  
Hannah McConchie ◽  
Yvonne de Kort ◽  
Giovanni Licitra ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Neurological Disorders ◽  
Activity Patterns ◽  
Sleep Diary ◽  
Monitoring Method ◽  
Smartphone Use ◽  
Long Term Monitoring ◽  
Behavioural Biometrics ◽  
Term Monitoring ◽  
Rest Activity

Abstract Introduction Rest-activity patterns are important aspects of healthy sleep and may be disturbed in conditions like circadian rhythm disorders, insomnia, insufficient sleep syndrome, and neurological disorders. Long-term monitoring of rest-activity patterns is typically performed with diaries or actigraphy. Here, we propose a fully unobtrusive method to obtain rest-activity patterns using smartphone keyboard activity. This study investigated whether keyboard activities from habitual smartphone use are reliable estimates of rest and activity timing compared to daily self-reports within healthy participants. Methods First-year students (n = 51) used a custom smartphone keyboard to passively and objectively measure smartphone use behaviours, and filled out the Consensus Sleep Diary for one week. The time of the last keyboard activity before a nightly absence of keystrokes, and the time of the first keyboard activity following this period were used as markers. Results Results revealed high correlations between these markers and user-reported onset and offset of resting period (r ranged 0.74 - 0.80). Linear mixed models could estimate onset and offset of resting periods with reasonable accuracy (R2 ranged 0.60 - 0.66). This indicates that smartphone keyboard activity can be used to estimate rest-activity patterns. In addition, effects of chronotype and type of day were investigated. Conclusion Implementing this monitoring method in longitudinal studies would allow for long-term monitoring of (disturbances to) rest-activity patterns, without user burden or additional costly devices. It could be particularly useful in studies amongst clinical populations with sleep-related problems, or in populations for whom disturbances in rest-activity patterns are secondary complaints, such as neurological disorders. Support (if any):

scholarly journals Rest-activity patterns and falls and fractures in older men

2016 ◽  
Vol 28 (4) ◽  
pp. 1313-1322 ◽  
Author(s):  
Tara S. Rogers ◽  
Terri L. Blackwell ◽  
Nancy E. Lane ◽  
Greg Tranah ◽  
Eric S. Orwoll ◽  
...  
Keyword(s):  
Activity Patterns ◽  
Older Men ◽  
Rest Activity

scholarly journals Zeitgebers and their association with rest-activity patterns

2018 ◽  
Vol 36 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Mirja Quante ◽  
Sara Mariani ◽  
Jia Weng ◽  
Catherine R Marinac ◽  
Emily R Kaplan ◽  
...  
Keyword(s):  
Activity Patterns ◽  
Rest Activity

scholarly journals Rest-activity cycles and melatonin phase angle of circadian entrainment in people without cone-mediated vision

2020 ◽  
Author(s):  
Manuel Spitschan ◽  
Corrado Garbazza ◽  
Susanne Kohl ◽  
Christian Cajochen
Keyword(s):  
Ganglion Cells ◽  
Light Exposure ◽  
Activity Patterns ◽  
External World ◽  
Circadian Phase ◽  
Cone System ◽  
Retinohypothalamic Tract ◽  
Activity Cycles ◽  
Phase Angles ◽  
Rest Activity

AbstractLight is strong zeitgeber to the human circadian system, entraining internal rhythms in physiology and behaviour to the external world. This is mediated by the melanopsin-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs), which sense light in addition to the classical photoreceptors, the cones and rods. Circadian responses depend on light intensity, with exposure to brighter light leading to bigger circadian phase shifts and melatonin suppression. In congenital achromatopsia (prevalence 1 in 30,000 to 50,000 people), the cone system is non-functional, resulting in light avoidance and photophobia at light levels which are tolerable and habitual to individuals with a normal, trichromatic retina. Here, we examined chronotype and self-reported sleep, actigraphy-derived rest-activity cycles and increases melatonin in the evening in a group of genetically confirmed congenital achromats. We found normal rest-activity patterns in all participants, and normal melatonin phase angles of entrainment in 2/3 of our participants. Our results suggest that a functional cone system and exposure to daytime light intensities are not necessary for regular behavioural and hormonal entrainment. This may point to a compensation mechanism in circadian photoreception, which in conjunction with non-photic zeitgebers, ensures synchronisation of activity to the external world.Significance statementRhythms in physiology and behaviour are synchronised to the external cycle of light exposure. This is mediated by the retinohypothalamic tract, which connects the photoreceptors in the eye with the “circadian pacemaker” in our brain, the suprachiasmatic nucleus. What happens to our circadian rhythm when we lack the cone photoreceptors in the eye that enable us to see in daylight? We examined this question in a group of rare congenital achromats. Our work reveals that normal rhythms in rest and activity, and production of hormones, does not require a functional cone system.

Nonparametric parameters of 24-hour rest-activity rhythms and long-term cognitive decline and incident cognitive impairment in older men

2021 ◽  
Author(s):  
Qian Xiao ◽  
Joshua N Sampson ◽  
Andrea Z LaCroix ◽  
Aladdin H Shadyab ◽  
Jamie M Zeitzer ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Mini Mental State Examination ◽  
Activity Patterns ◽  
Medication Use ◽  
Older Men ◽  
Activity Rhythms ◽  
Early Biomarkers ◽  
State Examination ◽  
Rest Activity

Abstract Altered 24-hour rest-activity rhythms may be associated with cognitive impairment in older adults, but evidence from prospective studies is limited. Non-parametric methods were used to assess actigraphy-based activity patterns in 2,496 older men. Incident cognitive impairment was assessed four times over 12 years using the Modified Mini Mental State Examination (3MS) and Trails B tests, self-reported medication use, and clinical diagnosis. The highest quartile (vs. the lowest) of intradaily variability and the lowest quartiles (vs. the highest) of interdaily stability and relative amplitude were associated with incident cognitive impairment ((Hazard ratio (95% confidence interval): 1.82 (1.31, 2.53)), 1.36 (0.99, 1.86), and 1.85 (1.33, 2.56), respectively). A larger increase in intradaily variability over 7.5 years was associated with a greater subsequent decline in 3MS scores but not in Trails B performance. In conclusion, less stable and more variable rest-activity rhythms may represent early biomarkers of cognitive impairment in older men.

scholarly journals Fragmentation of Rest/Activity Patterns in Community-Based Elderly Individuals Predicts Incident Heart Failure

2020 ◽  
Vol Volume 12 ◽  
pp. 299-307
Author(s):  
Lei Gao ◽  
Andrew SP Lim ◽  
Patricia M Wong ◽  
Arlen Gaba ◽  
Longchang Cui ◽  
...  
Keyword(s):  
Heart Failure ◽  
Activity Patterns ◽  
Community Based ◽  
Elderly Individuals ◽  
Incident Heart Failure ◽  
Rest Activity

scholarly journals Association of Daily Rest-Activity Patterns With Adiposity and Cardiometabolic Risk Measures in Teens

2019 ◽  
Vol 65 (2) ◽  
pp. 224-231 ◽  
Author(s):  
Mirja Quante ◽  
Elizabeth M. Cespedes Feliciano ◽  
Sheryl L. Rifas-Shiman ◽  
Sara Mariani ◽  
Emily R. Kaplan ◽  
...  
Keyword(s):  
Cardiometabolic Risk ◽  
Risk Measures ◽  
Activity Patterns ◽  
Rest Activity

scholarly journals Daily rest-activity patterns in the bipolar phenotype: A controlled actigraphy study

2013 ◽  
Vol 31 (2) ◽  
pp. 290-296 ◽  
Author(s):  
Philippa Rock ◽  
Guy Goodwin ◽  
Catherine Harmer ◽  
Katharina Wulff
Keyword(s):  
Activity Patterns ◽  
Rest Activity

scholarly journals Deletion of AMPA receptor GluA1 subunit gene (Gria1) causes circadian rhythm disruption and aberrant responses to environmental cues

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Gauri Ang ◽  
Laurence A. Brown ◽  
Shu K. E. Tam ◽  
Kay E. Davies ◽  
Russell G. Foster ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Ampa Receptor ◽  
Short Term Memory ◽  
Wheel Running ◽  
Activity Patterns ◽  
Recognition Task ◽  
Light Sensitivity ◽  
Individual Variability ◽  
Dark Light ◽  
Rest Activity

AbstractDysfunction of the glutamate α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor GluA1 subunit and deficits in synaptic plasticity are implicated in schizophrenia and sleep and circadian rhythm disruption. To investigate the role of GluA1 in circadian and sleep behaviour, we used wheel-running, passive-infrared, and video-based home-cage activity monitoring to assess daily rest–activity profiles of GluA1-knockout mice (Gria1−/−). We showed that these mice displayed various circadian abnormalities, including misaligned, fragmented, and more variable rest–activity patterns. In addition, they showed heightened, but transient, behavioural arousal to light→dark and dark→light transitions, as well as attenuated nocturnal-light-induced activity suppression (negative masking). In the hypothalamic suprachiasmatic nuclei (SCN), nocturnal-light-induced cFos signals (a molecular marker of neuronal activity in the preceding ~1–2 h) were attenuated, indicating reduced light sensitivity in the SCN. However, there was no change in the neuroanatomical distribution of expression levels of two neuropeptides―vasoactive intestinal peptide (VIP) and arginine vasopressin (AVP)―differentially expressed in the core (ventromedial) vs. shell (dorsolateral) SCN subregions and both are known to be important for neuronal synchronisation within the SCN and circadian rhythmicity. In the motor cortex (area M1/M2), there was increased inter-individual variability in cFos levels during the evening period, mirroring the increased inter-individual variability in locomotor activity under nocturnal light. Finally, in the spontaneous odour recognition task GluA1 knockouts’ short-term memory was impaired due to enhanced attention to the recently encountered familiar odour. These abnormalities due to altered AMPA-receptor-mediated signalling resemble and may contribute to sleep and circadian rhythm disruption and attentional deficits in different modalities in schizophrenia.

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