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Hemispheric specialization in dogs for processing different acoustic stimuli.

Siniscalchi M, Quaranta A, Rogers LJ - PLoS ONE (2008)

Bottom Line: The left hemisphere uses learned patterns and responds to familiar stimuli.Nevertheless, conspecific vocalizations are not always processed by the left hemisphere, since the right hemisphere is used for processing vocalizations when they elicit intense emotion, including fear.These findings suggest that the specialisation of the left hemisphere for intraspecific communication is more ancient that previously thought, and so is specialisation of the right hemisphere for intense emotions.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Production, University of Bari, Bari, Italy. m.siniscalchi@veterinaria.uniba.it

ABSTRACT
Considerable experimental evidence shows that functional cerebral asymmetries are widespread in animals. Activity of the right cerebral hemisphere has been associated with responses to novel stimuli and the expression of intense emotions, such as aggression, escape behaviour and fear. The left hemisphere uses learned patterns and responds to familiar stimuli. Although such lateralization has been studied mainly for visual responses, there is evidence in primates that auditory perception is lateralized and that vocal communication depends on differential processing by the hemispheres. The aim of the present work was to investigate whether dogs use different hemispheres to process different acoustic stimuli by presenting them with playbacks of a thunderstorm and their species-typical vocalizations. The results revealed that dogs usually process their species-typical vocalizations using the left hemisphere and the thunderstorm sounds using the right hemisphere. Nevertheless, conspecific vocalizations are not always processed by the left hemisphere, since the right hemisphere is used for processing vocalizations when they elicit intense emotion, including fear. These findings suggest that the specialisation of the left hemisphere for intraspecific communication is more ancient that previously thought, and so is specialisation of the right hemisphere for intense emotions.

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Related in: MedlinePlus

Data for the significant correlations discussed in the text between Laterality Index and the Latency to resume feeding (A, Isolation; B, Play) and between Laterality Index and the Reactivity Index (C, Isolation; D, Play); Data presented are means calculated for each dog over the first 7 presentations.
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pone-0003349-g005: Data for the significant correlations discussed in the text between Laterality Index and the Latency to resume feeding (A, Isolation; B, Play) and between Laterality Index and the Reactivity Index (C, Isolation; D, Play); Data presented are means calculated for each dog over the first 7 presentations.

Mentions: A Pearson's correlation comparing the Laterality Index and the Latency to resume feeding demonstrated a strong positive and significant association for the three calls: “isolation” (r(12) = 0.873, P = 0.000); “play” (r(12) = 0.734, P = 0.003); “disturbance” (r(12) = 0.640, P = 0.014) Figure 5 (A, B).


Hemispheric specialization in dogs for processing different acoustic stimuli.

Siniscalchi M, Quaranta A, Rogers LJ - PLoS ONE (2008)

Data for the significant correlations discussed in the text between Laterality Index and the Latency to resume feeding (A, Isolation; B, Play) and between Laterality Index and the Reactivity Index (C, Isolation; D, Play); Data presented are means calculated for each dog over the first 7 presentations.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2553184&req=5

pone-0003349-g005: Data for the significant correlations discussed in the text between Laterality Index and the Latency to resume feeding (A, Isolation; B, Play) and between Laterality Index and the Reactivity Index (C, Isolation; D, Play); Data presented are means calculated for each dog over the first 7 presentations.
Mentions: A Pearson's correlation comparing the Laterality Index and the Latency to resume feeding demonstrated a strong positive and significant association for the three calls: “isolation” (r(12) = 0.873, P = 0.000); “play” (r(12) = 0.734, P = 0.003); “disturbance” (r(12) = 0.640, P = 0.014) Figure 5 (A, B).

Bottom Line: The left hemisphere uses learned patterns and responds to familiar stimuli.Nevertheless, conspecific vocalizations are not always processed by the left hemisphere, since the right hemisphere is used for processing vocalizations when they elicit intense emotion, including fear.These findings suggest that the specialisation of the left hemisphere for intraspecific communication is more ancient that previously thought, and so is specialisation of the right hemisphere for intense emotions.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Production, University of Bari, Bari, Italy. m.siniscalchi@veterinaria.uniba.it

ABSTRACT
Considerable experimental evidence shows that functional cerebral asymmetries are widespread in animals. Activity of the right cerebral hemisphere has been associated with responses to novel stimuli and the expression of intense emotions, such as aggression, escape behaviour and fear. The left hemisphere uses learned patterns and responds to familiar stimuli. Although such lateralization has been studied mainly for visual responses, there is evidence in primates that auditory perception is lateralized and that vocal communication depends on differential processing by the hemispheres. The aim of the present work was to investigate whether dogs use different hemispheres to process different acoustic stimuli by presenting them with playbacks of a thunderstorm and their species-typical vocalizations. The results revealed that dogs usually process their species-typical vocalizations using the left hemisphere and the thunderstorm sounds using the right hemisphere. Nevertheless, conspecific vocalizations are not always processed by the left hemisphere, since the right hemisphere is used for processing vocalizations when they elicit intense emotion, including fear. These findings suggest that the specialisation of the left hemisphere for intraspecific communication is more ancient that previously thought, and so is specialisation of the right hemisphere for intense emotions.

Show MeSH
Related in: MedlinePlus