scholarly journals Circadian Rhythm Analysis Using Wearable Device Data: A Novel Penalized Machine Learning Approach (Preprint)

2020 ◽  
Author(s):  
Xinyue Li ◽  
Michael Kane ◽  
Yunting Zhang ◽  
Wanqi Sun ◽  
Yuanjin Song ◽  
...  
Keyword(s):  
Machine Learning ◽  
Early Childhood ◽  
Circadian Rhythm ◽  
Motor Development ◽  
Activity Rhythm ◽  
Activity Patterns ◽  
Daily Rhythm ◽  
Wearable Device ◽  
Rhythm Analysis ◽  
Peabody Developmental Motor Scales

BACKGROUND Wearable devices have been widely used in clinical studies to study daily activity patterns, but the analysis remains the major obstacle for researchers. OBJECTIVE This study proposed a novel method to characterize sleep-activity rhythms using actigraphy and further used it to describe early childhood daily rhythm formation and examine its association with physical development. METHODS We developed a machine learning-based Penalized Multi-band Learning (PML) algorithm to sequentially infer dominant periodicities based on Fast Fourier Transform (FFT) and further characterize daily rhythms. We implemented and applied the algorithm to Actiwatch data collected from a 262 healthy infant cohort at 6-, 12-, 18-, and 24-month old, with 159, 101, 111, and 141 subjects participating at each time point respectively. Autocorrelation analysis and Fisher’s test for harmonic analysis with Bonferroni correction were applied to compare with PML. The association between activity rhythm features and early childhood motor development, assessed by Peabody Developmental Motor Scales-Second Edition (PDMS-2), was studied through linear regression. RESULTS PML results showed that 1-day periodicity is most dominant at 6 and 12 months, whereas 1-day, 1/3-day, and 1/2-day periodicities are most dominant at 18 and 24 months. These periodicities are all significant in Fisher’s test, with 1/4-day periodicity also significant at 12 months. Autocorrelation effectively detected 1-day periodicity but not others. At 6 months, PDMS-2 is associated with assessment seasons. At 12 months, PDMS-2 is associated with seasons and FFT signals at 1/3-day periodicity (P<.001) and 1/2-day periodicity (P=.04). In particular, subcategories of stationary, locomotion, and gross motor are associated with FFT signals at 1/3-day periodicity (P<.001). CONCLUSIONS The proposed PML algorithm can effectively conduct circadian rhythm analysis using time-series wearable device data. Application of the method effectively characterized sleep-wake rhythm development and identified the association between daily rhythm formation and motor development during early childhood. CLINICALTRIAL

scholarly journals Circadian Rhythm Analysis Using Wearable Device Data: A Novel Penalized Machine Learning Approach

2020 ◽  
Author(s):  
Xinyue Li ◽  
Michael Kane ◽  
Yunting Zhang ◽  
Wanqi Sun ◽  
Yuanjin Song ◽  
...  
Keyword(s):  
Machine Learning ◽  
Early Childhood ◽  
Circadian Rhythm ◽  
Motor Development ◽  
Activity Rhythm ◽  
Activity Patterns ◽  
Daily Rhythm ◽  
Wearable Device ◽  
Study Objective ◽  
Rhythm Analysis

AbstractBackgroundWearable devices have been widely used in clinical studies to study daily activity patterns, but the analysis remains the major obstacle for researchers.Study ObjectiveThis study proposed a novel method to characterize sleep-activity rhythms using actigraphy and further used it to describe early childhood daily rhythm formation and examine its association with physical development.MethodsWe developed a machine learning-based Penalized Multi-band Learning (PML) algorithm to sequentially infer dominant periodicities based on Fast Fourier Transform (FFT) and further characterize daily rhythms. We implemented and applied the algorithm to Actiwatch data collected from a 262 healthy infant cohort at 6-, 12-, 18-, and 24-month old, with 159, 101, 111, and 141 subjects participating at each time point respectively. Autocorrelation analysis and Fisher’s test for harmonic analysis with Bonferroni correction were applied to compare with PML. The association between activity rhythm features and early childhood motor development, assessed by Peabody Developmental Motor Scales-Second Edition (PDMS-2), was studied through linear regression.ResultsPML results showed that 1-day periodicity is most dominant at 6 and 12 months, whereas 1-day, 1/3-day, and 1/2-day periodicities are most dominant at 18 and 24 months. These periodicities are all significant in Fisher’s test, with 1/4-day periodicity also significant at 12 months. Autocorrelation effectively detected 1-day periodicity but not others. At 6 months, PDMS-2 is associated with assessment seasons. At 12 months, PDMS-2 is associated with seasons and FFT signals at 1/3-day periodicity (P<.001) and 1/2-day periodicity (P=.04). In particular, subcategories of stationary, locomotion, and gross motor are associated with FFT signals at 1/3-day periodicity (P<.001).ConclusionsThe proposed PML algorithm can effectively conduct circadian rhythm analysis using time-series wearable device data. Application of the method effectively characterized sleep-wake rhythm development and identified the association between daily rhythm formation and motor development during early childhood.

scholarly journals Circadian Rhythm Analysis Using Wearable Device Data: A Novel Penalized Machine Learning Approach (Preprint)

10.2196/18403 ◽  
2020 ◽  
Author(s):  
Xinyue Li ◽  
Michael Kane ◽  
Yunting Zhang ◽  
Wanqi Sun ◽  
Yuanjin Song ◽  
...  
Keyword(s):  
Machine Learning ◽  
Circadian Rhythm ◽  
Wearable Device ◽  
Learning Approach ◽  
Machine Learning Approach ◽  
Rhythm Analysis

scholarly journals Association between circadian activity rhythms and mood episode relapse in bipolar disorder: a 12-month prospective cohort study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuichi Esaki ◽  
Kenji Obayashi ◽  
Keigo Saeki ◽  
Kiyoshi Fujita ◽  
Nakao Iwata ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Cohort Study ◽  
Circadian Rhythm ◽  
Prospective Cohort ◽  
Activity Rhythm ◽  
Circadian Activity ◽  
Activity Rhythms ◽  
Mood Episode ◽  
Rhythm Analysis

AbstractA significant proportion of patients with bipolar disorder experience mood episode relapses. We examined whether circadian activity rhythms were associated with mood episode relapses in patients with bipolar disorder. This prospective cohort study included outpatients with bipolar disorder who participated in a study titled “Association between the Pathology of Bipolar Disorder and Light Exposure in Daily Life (APPLE) cohort study.” The participants’ physical activity was objectively assessed using a wrist-worn accelerometer over 7 consecutive days for the baseline assessment and then at the 12-month follow-up for mood episode relapses. The levels and timing of the circadian activity rhythms were estimated using a cosinor analysis and a nonparametric circadian rhythm analysis. Of the 189 participants, 88 (46%) experienced mood episodes during follow-up. The Cox proportional hazards model adjusting for potential confounders showed that a robust circadian activity rhythm, including midline-estimating statistic of rhythm (MESOR) and amplitude by cosinor analysis and 10 consecutive hours with the highest amplitude values (M10) by the nonparametric circadian rhythm analysis, was significantly associated with a decrease in mood episode relapses (per counts/min, hazard ratio [95% confidence interval]: MESOR, 0.993 [0.988–0.997]; amplitude, 0.994 [0.988–0.999]; and M10, 0.996 [0.993–0.999]). A later timing of the circadian activity rhythm (M10 onset time) was significantly associated with an increase in the depressive episode relapses (per hour; 1.109 [1.001–1.215]). We observed significant associations between circadian activity rhythms and mood episode relapses in bipolar disorder.

The Effect of Light Regimes on the Circadian Rhythm of Flight Activity in the Mosquito Aedes Taeniorhynchus

1971 ◽  
Vol 54 (3) ◽  
pp. 745-756
Author(s):  
J. K. NAYAR ◽  
D. M. SAUERMAN
Keyword(s):  
Circadian Rhythm ◽  
Developmental Stages ◽  
Activity Rhythm ◽  
Activity Patterns ◽  
Flight Activity ◽  
Activity Rhythms ◽  
Light Regimes ◽  
Aedes Taeniorhynchus ◽  
First Time ◽  
Pipiens Pallens

1. The flight activity patterns of groups and individuals of sugar-fed A. taeniorhynchus females have been studied under different light regimes, by recording of flight sound as an indicator of flight activity. 2. In an LD 12:12 regime, flight activity occurs both at light-off and light-on, forming a bimodal ‘alternans’ pattern. This basic pattern of flight activity persists with a periodicity of 23.5 h under continuous DD, but under continuous LL is masked over by irregular excessive outbursts of activity. 3. The flight activity rhythm originates for the first time in the adult stage, and it is not carried over from rhythms of developmental stages. 4. Flight activity rhythms can be entrained to a new light regime within 24-36 h which is rather fast. An early light-off does not reset the phase of the rhythm, but a delayed light-off does. 5. The flight activity rhythm can be entrained to 24 h light regimes other than LD 12:12. But a single stimulus of less than 12 h is not effective in initiating the bimodal circadian rhythm. 6. Frequency demultiplication within certain limits can entrain the flight activity rhythm to 24 h. 7. This flight activity rhythm of A. taeniorhynchus is compared with the activity rhythms of Aopheles gambiae and Culex pipiens pallens. 8. It is concluded that the basic bimodal alternans pattern of flight activity is a persistent property of the circadian oscillating system, which suggests that other activity rhythms involving flight are dependent on the same rhythm.

PENGEMBANGAN FISIK MOTORIK ANAK USIA DINI DENGAN BERMAI

Edupedia ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 67-77
Author(s):  
Farhatin Masrurah ◽  
Khulusinniyah Khulusinniyah
Keyword(s):  
Early Childhood ◽  
High Activity ◽  
Motor Skills ◽  
Motor Development ◽  
Rapid Growth ◽  
Skills Development ◽  
Fine Motor ◽  
Fine Motor Skills ◽  
Gross Motor ◽  
Gross Motor Skills

The first five years of a children’s age is the period of rapid growth with physical and motor development. Those process will develop well if stimulated continuously. Early childhood always identic with high activity requires the opportunity to express their abilities. Therefore playing method is very urgent inchildren’s gross motor skills and fine motor skills development through a variety of playing activities both indoors and outdoors. Playing is an activity that cannot be separated from early childhood’s world. All playing activities will be carried out happily. By the same token learning by playing will be done happily without any sense of being forced or oppressed.

scholarly journals The Emerging Circadian Phenotype of Borderline Personality Disorder: Mechanisms, Opportunities and Future Directions

2021 ◽  
Vol 23 (5) ◽  
Author(s):  
Niall M. McGowan ◽  
Kate E. A. Saunders
Keyword(s):  
Circadian Rhythm ◽  
Borderline Personality Disorder ◽  
Personality Disorder ◽  
Activity Patterns ◽  
Borderline Personality ◽  
Sleep Wake Disorders ◽  
Future Directions ◽  
Pilot Studies ◽  
Substantial Clinical Benefit ◽  
Biological Target

Abstract Purpose of Review We review the recent evidence suggesting that circadian rhythm disturbance is a common unaddressed feature of borderline personality disorder (BPD); amelioration of which may confer substantial clinical benefit. We assess chronobiological BPD studies from a mechanistic and translational perspective and highlight opportunities for the future development of this hypothesis. Recent Findings The emerging circadian phenotype of BPD is characterised by a preponderance of comorbid circadian rhythm sleep-wake disorders, phase delayed and misaligned rest-activity patterns and attenuated amplitudes of usually well-characterised circadian rhythms. Such disturbances may exacerbate symptom severity, and specific maladaptive personality dimensions may produce a liability towards extremes in chronotype. Pilot studies suggest intervention may be beneficial, but development is limited. Summary Endogenous and exogenous circadian rhythm disturbances appear to be common in BPD. The interface between psychiatry and chronobiology has led previously to novel efficacious strategies for the treatment of psychiatric disorders. We believe that better characterisation of the circadian phenotype in BPD will lead to a directed biological target for treatment in a condition where there is a regrettable paucity of accessible therapies.

Disrupted circadian rhythms in VIP- and PHI-deficient mice

2003 ◽  
Vol 285 (5) ◽  
pp. R939-R949 ◽  
Author(s):  
Christopher S. Colwell ◽  
Stephan Michel ◽  
Jason Itri ◽  
Williams Rodriguez ◽  
J. Tam ◽  
...  
Keyword(s):  
Circadian Rhythms ◽  
Wheel Running ◽  
Activity Rhythm ◽  
Activity Patterns ◽  
Circadian System ◽  
Diurnal Rhythms ◽  
Constant Darkness ◽  
Light Cycle ◽  
Wild Type ◽  
Deficient Mice

The related neuropeptides vasoactive intestinal peptide (VIP) and peptide histidine isoleucine (PHI) are expressed at high levels in the neurons of the suprachiasmatic nucleus (SCN), but their function in the regulation of circadian rhythms is unknown. To study the role of these peptides on the circadian system in vivo, a new mouse model was developed in which both VIP and PHI genes were disrupted by homologous recombination. In a light-dark cycle, these mice exhibited diurnal rhythms in activity which were largely indistinguishable from wild-type controls. In constant darkness, the VIP/PHI-deficient mice exhibited pronounced abnormalities in their circadian system. The activity patterns started ∼8 h earlier than predicted by the previous light cycle. In addition, lack of VIP/PHI led to a shortened free-running period and a loss of the coherence and precision of the circadian locomotor activity rhythm. In about one-quarter of VIP/PHI mice examined, the wheel-running rhythm became arrhythmic after several weeks in constant darkness. Another striking example of these deficits is seen in the split-activity patterns expressed by the mutant mice when they were exposed to a skeleton photoperiod. In addition, the VIP/PHI-deficient mice exhibited deficits in the response of their circadian system to light. Electrophysiological analysis indicates that VIP enhances inhibitory synaptic transmission within the SCN of wild-type and VIP/PHI-deficient mice. Together, the observations suggest that VIP/PHI peptides are critically involved in both the generation of circadian oscillations as well as the normal synchronization of these rhythms to light.

scholarly journals Circadian Rhythm and Stress Response in Droppings ofSerinus canaria

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Maura Turriani ◽  
Nicola Bernabò ◽  
Barbara Barboni ◽  
Gianluca Todisco ◽  
Luigi Montini ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Stress Response ◽  
Enzyme Immunoassay ◽  
Light Period ◽  
Daily Rhythm ◽  
Fecal Excretion ◽  
Dark Phase ◽  
Light Cycle ◽  
Serinus Canaria ◽  
Commercial Enzyme Immunoassay

Serinus canariais a widespread domestic ornamental songbird, whose limited knowledge of biology make compelling studies aimed to monitor stress. Here, a commercial enzyme immunoassay was adopted to measure immunoreactive corticosterone (CORT) in singleSerinus canariadropping sample, to monitor the daily fecal excretion of CORT in birds bred singly or in-group and to detect the effect promoted by aviary or small transport cage restraint. A robust daily rhythm of CORT was recorded in animals held on short-day light cycle, independent of bred conditions (single or group), which persisted when space availability was modified in single bred animal (transfer in aviary and transport cages). By contrast, a significant change in CORT excretion was recorded when group bred animals are restrained in a smaller cage. The daily rhythm in CORT excretion in response to manipulation showed the greatest response at the beginning of the light period, followed by the absence of the peak usually recorded at the end of the dark phase. These data indicated that EIA could be used as a reliable noninvasive approach to monitor the stress induced by restraint conditions inSerinus canaria.

The Effects of an Integrative, Universally Designed Motor Skill Intervention for Young Children With and Without Disabilities

2021 ◽  
pp. 1-18
Author(s):  
Sally Taunton Miedema ◽  
Ali Brian ◽  
Adam Pennell ◽  
Lauren Lieberman ◽  
Larissa True ◽  
...  
Keyword(s):  
Early Childhood ◽  
Young Children ◽  
Motor Development ◽  
Motor Skill ◽  
Developmental Needs ◽  
School Based ◽  
Singular Component ◽  
Component Approach ◽  
Motor Skill Intervention ◽  
Early Childhood Center

Many interventions feature a singular component approach to targeting children’s motor competency and proficiency. Yet, little is known about the use of integrative interventions to meet the complex developmental needs of children aged 3–6 years. The purpose of this study was to examine the effects of an integrative universally designed intervention on children with and without disabilities’ motor competency and proficiency. We selected children (N = 111; disability = 24; no disability = 87) to participate in either a school-based integrative motor intervention (n = 53) or a control condition (n = 58). Children in the integrative motor intervention both with and without disabilities showed significant improvement in motor competency and proficiency (p < .001) as compared with peers with and without disabilities in a control condition. Early childhood center directors (e.g., preschool and kindergarten) should consider implementing integrative universally designed interventions targeting multiple aspects of motor development to remediate delays in children with and without disabilities.

Effects of aging on entrainment and rate of resynchronization of circadian locomotor activity

1992 ◽  
Vol 263 (5) ◽  
pp. R1099-R1103 ◽  
Author(s):  
P. C. Zee ◽  
R. S. Rosenberg ◽  
F. W. Turek
Keyword(s):  
Circadian Rhythm ◽  
Locomotor Activity ◽  
Activity Rhythm ◽  
Phase Advance ◽  
Middle Aged ◽  
Age Related ◽  
Free Running ◽  
Effects Of Aging ◽  
Free Running Period ◽  
Related Phase

The phase angle of entrainment of the circadian rhythm of the locomotor activity rhythm to a light-dark (LD) cycle was examined in young (2-5 mo old) and middle-aged (13-16 mo old) hamsters. An age-related phase advance in the onset of locomotor activity relative to lights off was seen during stable entrainment to a 14:10-h LD cycle. In addition, the effects of age on the rate of reentrainment of the circadian rhythm of locomotor activity were examined by subjecting young and middle-aged hamsters to either an 8-h advance or delay shift of the LD cycle. Middle-aged hamsters resynchronized more rapidly after a phase advance of the LD cycle than did young hamsters, whereas young hamsters were able to phase delay more rapidly than middle-aged hamsters. The age-related phase advance of activity onset under entrained conditions, and the alteration of responses in middle-aged hamsters reentraining to a phase-shifted LD cycle, may be due to the shortening of the free-running period of the circadian rhythm of locomotor activity with advancing age that has previously been observed in this species.

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