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Olfactory Lateralization
No full textThis chapter will focus on the methods by which behavior can be used to study
olfactory lateralization in different animal models. Starting from the description
of different testing paradigms, each paragraph reported and discussed the
evolution and functional role of lateralized brain functions related to olfaction.
The main advantages and disadvantages of behavioral techniques used to
study olfactory lateralization are also discussed as well as any behavioral and
physiological validation. Furthermore, suggestions for improvements to the
current methods are given in the last section, with a focus on dog species
The dog nose 'KNOWS' fear: Asymmetric nostril use during sniffing at canine and human emotional stimuli
No full textPrevious studies have reported striking asymmetries in the nostril use of dogs during sniffing at different emotive stimuli. Here we report, for the first time, that this asymmetry is also manifested during sniffing of both human and canine odours collected during different emotional events. Results showed that during sniffing of conspecific odour collected during a stressful situation (e.g. an "isolation" situation in which a dog was isolated from its owner in an unfamiliar environment) dogs consistently used their right nostril (right hemisphere). On the other hand, dogs consistently used the left nostril to sniff human odours collected during fearful situations (emotion-eliciting movies) and physical stress, suggesting the prevalent activation of the left hemisphere. The opposite bias shown in nostril use during sniffing at canine versus human odours suggests that chemosignals communicate conspecific and heterospecific emotional cues using different sensory pathways
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