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  • Title: Fibre composition of the feline trochlear and abducens nerves.
    Author: Hildebrand C, Oscarsson A, Risling M.
    Journal: Brain Res; 1988 Jun 21; 453(1-2):401-7. PubMed ID: 3401778.
    Abstract:
    Cat trochlear and abducens nerves were studied by electron microscopy at two different levels. Five mm peripheral to the exit from the brainstem, the average number of myelinated axons is 965 in the trochlear nerve and 1901 in the abducens nerve. The size spectrum is unimodal and small myelinated axons predominate. Both nerves contain 16% unmyelinated axons at this level. At the PNS/CNS transition, the nerve fascicles contain few unmyelinated axons, but bundles of such axons are present in the adjacent pia mater. We suggest that the trochlear and abducens nerves may channel unmyelinated sensory and/or autonomic axons to the leptomeningeal blood vessels and the pia mater of the brainstem.
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