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Structural and Ultrastructural Study of the Intracranial Portion of the Oculomotor, Trochlear and Abducent Nerves in Dog
Author(s) -
Vivo J.,
Morales J. L.,
Díz A.,
Galisteo A. M.,
Monterde J. G.,
Agüera E.,
Miró F.
Publication year - 2006
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.2005.00658.x
Subject(s) - trochlear nerve , oculomotor nerve , anatomy , oculomotor nucleus , cranial nerves , medicine , midbrain , central nervous system , pathology , alternative medicine , palsy , endocrinology
Summary The right intracranial portion of the oculomotor, trochlear and abducent nerves were removed from six adult German shepherd dogs and analysed by light and electron microscopy. In all cases the nerve sectional area was calculated. Unmyelinated and myelinated fibres were analysed and number, diameter and cross‐sectional area were calculated. In myelinated fibres, also calculated were the corresponding axon area and diameter, and myelin sheath thickness. The mean number of myelinated fibres was 8543.50 ± 1231.85 being the unmyelinated 1402 ± 241.58 in the oculomotor nerve; 1509 ± 223.17 and 287.67 ± 72.28 in the trochlear nerve and 2473.00 ± 211.41 and 231.25 ± 92.67 respectively in the abducent. The mean diameter was 10.23 ± 0.68 μ m in myelinated and 0.43 ± 0.21 for unmyelinated in oculomotor nerve, 10.53 ± 0.55 μ m and 0.33 ± 0.04 for the trochlear, and 10.45 ± 1.27 μ m and 0.47 ± 0.09 in the abducent nerve respectively. This study reveals that oculomotor, trochlear and abducent nerves of the dog show structural and ultra‐structural features similar to the same nerves in other species.