Functional cerebral asymmetry in dogs living under different environmental conditions

Demirbas, Yasemin Salgirli; Isparta, Sevim; Öztürk, Hakan; Safak, Etkin; Emre, Bahri; Pişkin, İlksin; Kaya, Ufuk; Sağmanligil, Vedat; Akgul, Betul; Pereira, Goncalo Da Graça

doi:10.1016/j.beproc.2019.05.023

Cited by 11 publications

(9 citation statements)

References 42 publications

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“…Reduced lateralization, associated with reduced interhemispheric connections, has been associated with a number of negative psychological states in humans, such as post-traumatic stress disorder (e.g., [113][114][115][116]) and stress is associated with changes in lateralization in humans [117]. In non-human vertebrate species, living in conditions of poor welfare is associated with different degrees of lateralization [118,119]. Availability of sufficient space is of paramount importance for enrichment, and hence good welfare, and it can influence lateralization [120].…”

Section: Discussionmentioning

confidence: 99%

Does Functional Lateralization in Birds Have any Implications for Their Welfare?

Rogers

Kaplan

2019

Symmetry

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We know a good deal about brain lateralization in birds and a good deal about animal welfare, but relatively little about whether there is a noteworthy relationship between avian welfare and brain lateralization. In birds, the left hemisphere is specialised to categorise stimuli and to discriminate preferred categories from distracting stimuli (e.g., food from an array of inedible objects), whereas the right hemisphere responds to small differences between stimuli, controls social behaviour, detects predators and controls attack, fear and escape responses. In this paper, we concentrate on visual lateralization and the effect of light exposure of the avian embryo on the development of lateralization, and we consider its role in the welfare of birds after hatching. Findings suggest that light-exposure during incubation has a general positive effect on post-hatching behaviour, likely because it facilitates control of behaviour by the left hemisphere, which can suppress fear and other distress behaviour controlled by the right hemisphere. In this context, particular attention needs to be paid to the influence of corticosterone, a stress hormone, on lateralization. Welfare of animals in captivity, as is well known, has two cornerstones: enrichment and reduction of stress. What is less well-known is the link between the influence of experience on brain lateralization and its consequent positive or negative outcomes on behaviour. We conclude that the welfare of birds may be diminished by failure to expose the developing embryos to light but we also recognise that more research on the association between lateralization and welfare is needed.

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Section: Discussionmentioning

confidence: 99%

Does Functional Lateralization in Birds Have any Implications for Their Welfare?

Rogers

Kaplan

2019

Symmetry

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“…Dogs are therefore considered excellent models for understanding the effects of domestication on the animal brain 10 . Domestic dogs display different forms of behavioral asymmetries such as asymmetric tail wagging 11 , nostril preference 12 , visual 13,14 and auditory processing 15 , as well as paw preferences 3,16 . Pawedness is one of the most known expressions of behavioral lateralization in dogs, similar to handedness in humans.…”

Section: Acute and Chronic Stress Alter Behavioral Laterality In Dogsmentioning

confidence: 99%

“…A recent meta-analysis on dogs concluded that 68% of the dogs had either right or left paw dominance and, thus, showed individuallevel asymmetry 3 . Measuring pawedness in dogs is a subject of interest not only to understand the evolutionary mechanisms of behavioral asymmetries but also to evaluate its potential use as a temperament and stress indicator in dogs 16,17 . Recent studies show that the direction of lateralization can be important to assess the stress reactivity of an individual dog.…”

Section: Acute and Chronic Stress Alter Behavioral Laterality In Dogsmentioning

confidence: 99%

“…Thus, studying the effect of stress on cerebral asymmetries may give significant insights into the functional mechanisms sustaining lateralization and possible stress-related changes in behavioral asymmetries in dogs. A recent research study on environmental conditions in dogs predicted that chronic stress may cause altered asymmetries in dogs similar to humans 16 . A recent study by Garbiec et al 46 demonstrated that dogs with left paw preference are more susceptible to acute stress.…”

Section: Acute and Chronic Stress Alter Behavioral Laterality In Dogsmentioning

confidence: 99%

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Acute and chronic stress alter behavioral laterality in dogs

Demirbas

Isparta

Saral

et al. 2023

Sci Rep

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Dogs are one of the key animal species in investigating the biological mechanisms of behavioral laterality. Cerebral asymmetries are assumed to be influenced by stress, but this subject has not yet been studied in dogs. This study aims to investigate the effect of stress on laterality in dogs by using two different motor laterality tests: the Kong™ Test and a Food-Reaching Test (FRT). Motor laterality of chronically stressed (n = 28) and emotionally/physically healthy dogs (n = 32) were determined in two different environments, i.e., a home environment and a stressful open field test (OFT) environment. Physiological parameters including salivary cortisol, respiratory rate, and heart rate were measured for each dog, under both conditions. Cortisol results showed that acute stress induction by OFT was successful. A shift towards ambilaterality was detected in dogs after acute stress. Results also showed a significantly lower absolute laterality index in the chronically stressed dogs. Moreover, the direction of the first paw used in FRT was a good predictor of the general paw preference of an animal. Overall, these results provide evidence that both acute and chronic stress exposure can change behavioral asymmetries in dogs.

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“…Behavioral lateralization is evident in dogs in a variety of functions including paw preference, asymmetric tail wagging, visual processing, and auditory processing [ 1 ]. In addition, functional cerebral asymmetry has been recently demonstrated in dogs in which either the left or right brain hemispheres is responsible for certain motor functions [ 2 ]. Although lateralization has been identified in dogs [ 3 ], less is known about the lateralization of function of visceral organs such as the bladder.…”

Section: Introductionmentioning

confidence: 99%

Lateralization of bladder function in normal female canines

et al. 2022

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This study aimed to identify potential lateralization of bladder function. Electrical stimulation of spinal roots or the pelvic nerve’s anterior vesical branch was performed bilaterally in female dogs. The percent difference between the left and right stimulation-induced increased detrusor pressure was determined. Bladders were considered left or right-sided if differences were greater or less than 25% or 10%. Based on differences of 25%, upon stimulation of spinal roots, bladders were left-sided in 17/44 (38.6%), right-sided in 12/44 (27.2%) and bilateral in 15/44 (34.2%). Using ± 10%, 48% had left side dominance (n = 21/44), 39% had right side dominance (n = 17/44), and 14% were bilateral (n = 6/44). With stimulation of the pelvic nerve’s anterior vesical branch in 19 dogs, bladders were left-sided in 8 (42.1%), right-sided in 6 (31.6%) and bilateral in 5 (26.3%) using 25% differences and left side dominance in 8 (43%), right sided in 7 (37%) and bilateral in 4 (21%) using 10% differences. These data suggest lateralization of innervation of the female dog bladder with left- and right-sided lateralization occurring at similar rates. Lateralization often varied at different spinal cord levels within the same animal.

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Functional cerebral asymmetry in dogs living under different environmental conditions

Cited by 11 publications

References 42 publications

Does Functional Lateralization in Birds Have any Implications for Their Welfare?

Does Functional Lateralization in Birds Have any Implications for Their Welfare?

Acute and chronic stress alter behavioral laterality in dogs

Lateralization of bladder function in normal female canines

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