Proportional Cerebellum Size Predicts Fear Habituation in Chickens

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Proportional Cerebellum Size Predicts Fear Habituation in Chickens

Stingo Hirmas, Diego Vittorio (author): Linköpings universitet,Biologi,Tekniska fakulteten

Barros Da Cunha, Felipe (author): Linköpings universitet,Biologi,Tekniska fakulteten

Cardoso, Rita France (author): Linköpings universitet,Biologi,Tekniska fakulteten

Carra, Laura G. (author): Linköpings universitet,Biologi,Tekniska fakulteten

Rönnegård, Lars (author): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Högskolan Dalarna,Statistik,Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden,Dalarna Univ, Sweden; Swedish Univ Agr Sci, Sweden,Institutionen för husdjursgenetik (HGEN),Dalarna University

Wright, Dominic (author): Linköpings universitet,Biologi,Tekniska fakulteten

Henriksen, Rie (author): Linköpings universitet,Biologi,Tekniska fakulteten

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2022-02-17
2022
English.
In: Frontiers in Physiology. - : Frontiers Media SA. - 1664-042X. ; 13

Related links:: https://doi.org/10.3...; show more...; https://www.frontier...; https://liu.diva-por... (primary) (Raw object); https://pub.epsilon.... (primary) (Raw object) (free); https://urn.kb.se/re...; https://doi.org/10.3...; https://urn.kb.se/re...; https://res.slu.se/i...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

The cerebellum has a highly conserved neural structure across species but varies widely in size. The wide variation in cerebellar size (both absolute and in proportion to the rest of the brain) among species and populations suggests that functional specialization is linked to its size. There is increasing recognition that the cerebellum contributes to cognitive processing and emotional control in addition to its role in motor coordination. However, to what extent cerebellum size reflects variation in these behavioral processes within species remains largely unknown. By using a unique intercross chicken population based on parental lines with high divergence in cerebellum size, we compared the behavior of individuals repeatedly exposed to the same fear test (emergence test) early in life and after sexual maturity (eight trials per age group) with proportional cerebellum size and cerebellum neural density. While proportional cerebellum size did not predict the initial fear response of the individuals (trial 1), it did increasingly predict adult individuals response as the trials progressed. Our results suggest that proportional cerebellum size does not necessarily predict an individual's fear response, but rather the habituation process to a fearful stimulus. Cerebellum neuronal density did not predict fear behavior in the individuals which suggests that these effects do not result from changes in neuronal density but due to other variables linked to proportional cerebellum size which might underlie fear habituation.

Subject headings

NATURVETENSKAP -- Biologi -- Etologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Behavioural Sciences Biology (hsv//eng)
NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
LANTBRUKSVETENSKAPER -- Veterinärmedicin -- Medicinsk biovetenskap (hsv//swe)
AGRICULTURAL SCIENCES -- Veterinary Science -- Medical Bioscience (hsv//eng)
LANTBRUKSVETENSKAPER -- Husdjursvetenskap -- Husdjursvetenskap (hsv//swe)
AGRICULTURAL SCIENCES -- Animal and Dairy Sience -- Animal and Dairy Science. (hsv//eng)

Keyword

behavioral predictability
domestication
emergence test
isotropic fractionation
neural density

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ref (subject category)
art (subject category)

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Behavioural Scie ...

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Zoology

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Veterinary Scien ...; and Medical Bioscien ...

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Animal and Dairy ...; and Animal and Dairy ...

Articles in the publication: Frontiers in Phy ...

By the university: Högskolan Dalarna; Linköping University; Swedish University of Agricultural Sciences

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