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Article . 2014
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Scientific Reports
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Brain Mass and Cranial Nerve Size in Shrews and Moles

Authors: Duncan B, Leitch; Diana K, Sarko; Kenneth C, Catania;

Brain Mass and Cranial Nerve Size in Shrews and Moles

Abstract

AbstractWe investigated the relationship between body size, brain size and fibers in selected cranial nerves in shrews and moles. Species include tiny masked shrews (S. cinereus) weighing only a few grams and much larger mole species weighing up to 90 grams. It also includes closely related species with very different sensory specializations – such as the star-nosed mole and the common, eastern mole. We found that moles and shrews have tiny optic nerves with fiber counts not correlated with body or brain size. Auditory nerves were similarly small but increased in fiber number with increasing brain and body size. Trigeminal nerve number was by far the largest and also increased with increasing brain and body size. The star-nosed mole was an outlier, with more than twice the number of trigeminal nerve fibers than any other species. Despite this hypertrophied cranial nerve, star-nosed mole brains were not larger than predicted from body size, suggesting that magnification of their somatosensory systems does not result in greater overall CNS size.

Related Organizations
Subjects by Vocabulary

Microsoft Academic Graph classification: Sensory system Somatosensory system Mole Trigeminal nerve biology Cranial nerves Brain Mass Anatomy biology.organism_classification Brain size Eastern mole

Keywords

Article, Nerve Fibers, Species Specificity, Animals, Body Size, Trigeminal Nerve, Brain Mapping, Multidisciplinary, Shrews, Cranial Nerves, Brain, Organ Size, Moles

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    11
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
11
Average
Average
Average
Green
gold
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NSF| Mammalian Models in Neuroethology
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0844743
  • Funding stream: Directorate for Biological Sciences | Division of Integrative Organismal Systems
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Neuroinformatics
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