Inexpensive home infrared living/environment sensor with regional thermal information for infant physical and psychological development

Genta Karino, Aya Senoo, Tetsuya Kunikata, Yoshimasa Kamei, Hideo Yamanouchi, Shun Nakamura, Masanori Shukuya, Ricki J. Colman, Mamiko Koshiba

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The use of home-based image sensors for biological and environmental monitoring provides novel insight into health and development but it is difficult to evaluate people during their normal activities in their home. Therefore, we developed a low-cost infrared (IR) technology-based motion, location, temperature and thermal environment detection system that can be used non-invasively for long-term studies in the home environment. We tested this technology along with the associated analysis algorithm to visualize the effects of parental care and thermal environment on developmental state change in a non-human primate model, the common marmoset (Callithrix jacchus). To validate this system, we first compared it to a manual analysis technique and we then assessed the development of circadian rhythms in common marmosets from postnatal day 15–45. The semi-automatically tracked biological indices of locomotion velocity (BV) and body surface temperature (BT) and the potential psychological index of place preference toward the door (BD), showed age-dependent shifts in circadian phase patterns. Although environmental variables appeared to affect circadian rhythm development, principal component analysis and signal superimposing imaging methods revealed a novel phasic pattern of BD-BT correlation day/night switching in animals older than postnatal day 38 (approximately equivalent to one year of age in humans). The origin of this switch was related to earlier development of body temperature (BT) rhythms and alteration of psychological behavior rhythms (BD) around earlier feeding times. We propose that this cost-effective, inclusive sensing and analytic technique has value for understanding developmental care conditions for which continual home non-invasive monitoring would be beneficial and further suggest the potential to adapt this technique for use in humans.

Original languageEnglish
Article number6844
Pages (from-to)1-23
Number of pages23
JournalInternational journal of environmental research and public health
Issue number18
Publication statusPublished - 2020 Sep 2


  • Body temperature
  • Common marmoset
  • Complex change of circadian rhythms
  • Feeding influence
  • Infant development
  • Infrared image sensor
  • Life monitoring
  • Locomotion
  • Primate model

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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