Počet záznamů: 1  

Volume of the crocodilian brain and endocast during ontogeny

  1. 1.
    SYSNO ASEP0475786
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevVolume of the crocodilian brain and endocast during ontogeny
    Tvůrce(i) Jirák, D. (CZ)
    Janáček, Jiří (FGU-C) RID, ORCID
    Číslo článkue0178491
    Zdroj.dok.PLoS ONE
    Roč. 12, č. 6 (2017)
    Poč.str.10 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovabrain volume ; endoneurocranium ; crocodilians ; magnetic resonance imaging
    Vědní obor RIVEA - Morfologické obory a cytologie
    Obor OECDDevelopmental biology
    CEPGAP302/12/1207 GA ČR - Grantová agentura ČR
    GA13-12412S GA ČR - Grantová agentura ČR
    Institucionální podporaFGU-C - RVO:67985823
    UT WOS000403280900018
    EID SCOPUS85020923940
    AnotaceUnderstanding complex situations and planning difficult actions require a brain of appropriate size. Animal encephalisation provides an indirect information about these abilities. The brain is entirely composed of soft tissue and, as such, rarely fossilises. As a consequence, the brain proportions and morphology of some extinct vertebrates are usually only inferred from their neurocranial endocasts. However, because the morphological configuration of the brain is not fully reflected in the endocast, knowledge of the brain/endocast relationship is essential (especially the ratio of brain volume to endocast volume or the equivalent proportion of interstitial tissue) for studying the endocasts of extinct animals. Here we assess the encephalic volume and structure of modern crocodilians. The results we obtained using ex vivo magnetic resonance imaging reveal how the endoneurocranial cavity and brain compartments of crocodilians change configuration during ontogeny. We conclude that the endocasts of adult crocodilians are elongated and expanded while their brains are more linearly organised. The highest proportion of brain tissue to endocast volume is in the prosencephalon at over 50% in all but the largest animals, whereas the proportion in other brain segments is under 50% in all but the smallest animals and embryos. Our results may enrich the field of palaeontological study by offering more precise phylogenetic interpretations of the neuroanatomic characteristics of extinct vertebrates at various ontogenetic stages.
    PracovištěFyziologický ústav
    KontaktLucie Trajhanová, lucie.trajhanova@fgu.cas.cz, Tel.: 241 062 400
    Rok sběru2018
Počet záznamů: 1