[MARMAM] New paper: Neuroanatomy of the grey seal brain: bringing pinnipeds into the neurobiological study of vocal learning

Andrea andrea.ravignani at mpi.nl
Sun Nov 14 00:34:33 PST 2021

Dear colleagues,

Our paper on 'Neuroanatomy of the grey seal brain: bringing pinnipeds into the neurobiological study of vocal learning' has recently been published in Philosophical Transactions of the Royal Society B: Biological Sciences.

The paper is available here: https://pure.mpg.de/rest/items/item_3274989_5/component/file_3339889/content .

If the link above does not work and you would like to obtain a PDF, do not hesitate to contact me at: andrea.ravignani at mpi.nl <mailto:andrea.ravignani at mpi.nl> .

Kind regards,

Comparative animal studies of complex behavioural traits, and their neurobiological underpinnings, can increase our understanding of their evolution, including in humans. Vocal learning, a potential precursor to human speech, is one such trait. Mammalian vocal learning is under-studied: most research has either focused on vocal learning in songbirds or its absence in non-human primates. Here, we focus on a highly promising model species for the neurobiology of vocal learning: grey seals (Halichoerus grypus). We provide a neuroanatomical atlas (based on dissected brain slices and magnetic resonance images), a labelled MRI template, a three-dimensional model with volumetric measurements of brain regions, and histological cortical stainings. Four main features of the grey seal brain stand out: (i) it is relatively big and highly convoluted; (ii) it hosts a relatively large temporal lobe and cerebellum; (iii) the cortex is similar to that of humans in thickness and shows the expected six-layered mammalian structure; (iv) there is expression of FoxP2 present in deeper layers of the cortex; FoxP2 is a gene involved in motor learning, vocal learning, and spoken language. Our results could facilitate future studies targeting the neural and genetic underpinnings of mammalian vocal learning, thus bridging the research gap from songbirds to humans and non-human primates. Our findings are relevant not only to vocal learning research but also to the study of mammalian neurobiology and cognition more in general.

Andrea Ravignani
Group Leader, Comparative Bioacoustics, 
Max Planck Institute for Psycholinguistics

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