2022
DOI: 10.1186/s40317-022-00287-x
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Eavesdropping on the brain at sea: development of a surface-mounted system to detect weak electrophysiological signals from wild animals

Abstract: Despite rapid advances in sensor development and technological miniaturization, it remains challenging to non-invasively record small-amplitude electrophysiological signals from an animal in its natural environment. Many advances in ecophysiology and biologging have arisen through sleep studies, which rely on detecting small signals over multiple days and minimal disruption of natural animal behavior. This paper describes the development of a surface-mounted system that has allowed novel electrophysiological r… Show more

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Cited by 7 publications
(5 citation statements)
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References 76 publications
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“…1 and movie S1). These results underscore the importance of EEG in assessing sleep state ( 18 ). As seals shifted from SWS to REM sleep, sleep paralysis resulted in a loss of postural control.…”
Section: A New Tool To Detect Sleep At Seasupporting
confidence: 57%
See 2 more Smart Citations
“…1 and movie S1). These results underscore the importance of EEG in assessing sleep state ( 18 ). As seals shifted from SWS to REM sleep, sleep paralysis resulted in a loss of postural control.…”
Section: A New Tool To Detect Sleep At Seasupporting
confidence: 57%
“…We developed a new submersible system to record brain activity (electroencephalogram, EEG) and heart rate (electrocardiogram, ECG) concurrently with dive depth and motion of elephant seals at sea [Fig. 1E; ( 18 )]. These sensors identified sleep states [rapid eye movement (REM) sleep and slow-wave sleep (SWS); figs.…”
Section: A New Tool To Detect Sleep At Seamentioning
confidence: 99%
See 1 more Smart Citation
“…Hence, the effects of sleep on vocal learning and performance in wild birds are doubtlessly more complex than laboratory studies can reveal. Future research should also include less invasive methods to assess sleep in wild birds to increase accuracy, broaden taxa and minimize ethical issues [ 64 ]. With the continuous expansion of urban areas, anthropogenic nocturnal disruptions (e.g.…”
Section: Bird Vocalizations and Sleepmentioning
confidence: 99%
“…Ocean sunfish will perform deep dives during the day to feed in the mesopelagic zone, returning to the surface to warm up [63][64][65] . Elephant seals dive during sleep to avoid predators 66 . Most pertinently, larval zebrafish can dive/surface following changes to illumination [67][68][69] and anxiogenic/anxiolytic drugs 70 , and tend to occupy the top third of the water column in a tall (36 cm) tank 71 .…”
Section: Are Larval Zebrafish Truly Navigating Depth?mentioning
confidence: 99%