Journal article
Development of the amphibian oculomotor complex: Evidences for migration of oculomotor motoneurons across the midline
Anatomy and embryology, Vol.183(6), pp.545-552
06/1991
DOI: 10.1007/BF00187903
PMID: 1897742
Abstract
The development of the oculomotor nucleus in five species of salamanders and one anuran species was investigated with tracing techniques. The data presented support the hypothesis that oculomotor motoneurons innervating the superior rectus muscle migrate across the midline. In the salamander Pleurodeles waltl, only ipsilateral oculomotor motoneurons are labeled in early development. Later, these neurons extend dendrites toward the contralateral side into the ventral tegmental neuropil, after which there is displacement of their nuclei (neuronal somata) across the midline. Cell bodies can be observed directly at the midline. In adult Salamandra salamandra, motoneurons innervating the superior rectus muscle are seen occasionally at the midline and on the ipsilateral side, with dendrites toward the contralateral side. Motoneurons on the ipsilateral side do not display these features. In Pleurodeles, developmental brain processes are slowed down, and the sequence of development of the contralateral subnucleus, which can be clearly observed, supports the migration hypothesis. In Xenopus laevis and most other species of salamanders this process is accelerated.
Details
- Title: Subtitle
- Development of the amphibian oculomotor complex: Evidences for migration of oculomotor motoneurons across the midline
- Creators
- Christiane Naujoks-ManteuffelRonald SonntagBernd Fritzsch
- Resource Type
- Journal article
- Publication Details
- Anatomy and embryology, Vol.183(6), pp.545-552
- DOI
- 10.1007/BF00187903
- PMID
- 1897742
- NLM abbreviation
- Anat Embryol (Berl)
- ISSN
- 0340-2061
- eISSN
- 1432-0568
- Language
- English
- Date published
- 06/1991
- Academic Unit
- Iowa Neuroscience Institute; Biology; Craniofacial Anomalies Research Center
- Record Identifier
- 9984070751602771
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