Dog–owner interaction is reflected in heart rate variability
University of Jyväskylä - Jyväskylän yliopisto
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Research clarifies the mechanisms of human-dog interaction.
view moreCredit: University of Jyväskylä
Emotional connection enhances interaction in human relationships. Emotional synchronisation in the interaction between a child and a parent is essential for affective attachment. The relationship between a dog and its owner is also based on attachment, but little is known about its physiological mechanisms.
The heart rate variability of a dog and its owner adapt to each other
In a study conducted at the University of Jyväskylä, at the Department of Psychology and Jyväskylä Centre for Interdisciplinary Brain Research, it was found that the heart rate variability of a dog and its owner are interconnected during interaction. Heart rate variability, in other words, the variation in the heartbeat intervals, indicates the state of the autonomic nervous system. High heart rate variability is associated with a state of relaxation and recovery, while low heart rate variability indicates stimulation or strain, such as stress during an exam or sport performance. In this study, the owner’s high heart rate variability was connected to the dog’s high heart rate variability, and vice versa. In addition, the physical activity levels of a dog and its owner mutually adapted to each other during the study.
Different connections for activity and heart rate variability
The connections of heart rate variability and activity levels between a dog and its owner were monitored during specific interaction tasks. Both heart rate and activity level were interconnected between dogs and their owners, but at different times. During free-form resting periods, the owner’s high heart rate variability was connected to the dog’s high heart rate variability. In other words, when the owner was relaxed the dog was also relaxed. Moreover, the owner’s and dog’s activity levels were similar during the given tasks, such as playing. Although it is known that physical activity has an impact on heart rate, the strongest connections of these variables between dog and owner were found in different situations and do not fully explain each other. This suggests that the connection in heart rate variability reflects the synchrony of emotional state rather than of activity levels.
“The interconnection in heart rate variability between the dog and its owner during resting periods may be explained by the fact that in those instances there were no external tasks, but the counterparts could react more to each other’s state in a natural way,” says Doctoral Researcher Aija Koskela.
Owner’s temperament is connected to the dog’s heart rate variability
The study also investigated various background factors for the interconnection of the heart rate variability of the dog and its owner. Bigger dogs had higher heart rate variability. In addition, the dog’s high heart rate variability was also explained by the owner’s negative affectivity, a temperament trait that reflects the person’s tendency to become easily concerned about negative things. This type of owner tends to develop a strong emotional bond with the dog, and therefore the shepherd dogs of this study possibly had a higher sense of safety with these owners.
The dog also influences the owner
A surprising finding in the study was that the owner’s heart rate variability was best explained by the dog’s heart rate variability, even though also the owner’s activity level and body mass index, which are known to impact heart rate, were taken into account in the analysis.
“We exceptionally investigated both a dog’s and its owner’s heart rate and activity level simultaneously, whereas previous studies have commonly focused either on the human’s or the dog’s perspective,” says the leader of the study, Academy Research Fellow Miiamaaria Kujala. “The challenging research setting gives a better opportunity to investigate interactive aspects.”
This study indicates that the emotional states of dogs and their owners as well as the reactions of their nervous system become partially adapted to each other during interaction. The same mechanisms that strengthen human affective attachment also seem to support the relationship between a dog and its owner. This study deepens our understanding about interaction between species and about the meaning of emotional connection between dogs and humans.
Interaction research involved dogs bred for cooperation
The study was funded mainly by the Research Council of Finland and the Agria & Svenska Kennelklubben Research Fund. It involved altogether 30 voluntary dog owners with their dogs. The dogs represented breeds refined for cooperating with humans, such as sheep dogs and retrievers. The research findings are in line with previous studies, which have suggested that breeds selected for cooperation are particularly sensitive to react to their owners’ behaviour and personality traits. Next, the project will seek to shed light more specifically on the influential mechanisms involved in this phenomenon.
The study was published on 24 October 2024 in Scientific Reports:
Koskela, A., Törnqvist, H., Somppi, S. et al. Behavioral and emotional co-modulation during dog–owner interaction measured by heart rate variability and activity. Sci Rep 14, 25201 (2024). https://doi.org/10.1038/s41598-024-76831-x
Journal
Scientific Reports
Subject of Research
People
Article Title
Behavioral and emotional co-modulation during dog–owner interaction measured by heart rate variability and activity
Mechanosensory origins of “wet dog shakes” – a tactic used by many hairy mammals – uncovered in mice
Summary author: Walter Beckwith
“Wet dog shakes” – a common reflex behavior shared among many hairy mammals and designed to expel water and irritants from their coats – happens when particular mechanoreceptors are activated, researchers studying mice report. Many furry mammals engage in rapid body twists known as "wet dog shakes" to effectively remove water from their fur, as well as to eliminate irritants like tangles or parasites, particularly in areas on the neck and back that are largely unreachable by self-grooming or licking. However, despite the commonality of this behavior across species, the neural mechanisms underlying these shakes have remained largely unexplored. Using combined optogenetic, physiological, and behavioral approaches, Dawei Zhang and colleagues evaluated the neurobiological foundations of the wet dog shake behavior in mice. Zhang et al. found that mechanosensation mediated by the Piezo2 gene is essential for the wet dog shake response evoked by oil droplets applied to the backs of mice. According to the findings, mechanoreceptors known as “C-LTMRs,” which primarily innervate the hair follicles of the undercoat, are the key sensory players in this behavior. C-LTMRs, which are typically involved with pleasant affective touch, are connected to spinoparabrachial neurons that transmit sensory signals to the parabrachial nucleus in the brainstem. The authors found that optogenetic activation of C-LTRMs also elicited wet dog shakes without applying oil droplets. Moreover, inhibiting spinoparabrachial neuron synapses and excitatory neurons in the parabrachial nucleus disrupts the wet dog shake response triggered by both oil droplets and C-LTMR activation.
Journal
Science
Article Title
C-LTMRs evoke wet dog shakes via the spinoparabrachial pathway
Article Publication Date
8-Nov-2024
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