Localization of motoneurons innervating the extraocular muscles in the chameleon (Chamaeleo chameleon)
| Autor: | M. El Hassni, Jean-Paul Rio, Mohamed Bennis, Jacques Repérant |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Embryology
genetic structures Trochlear Nerve Biology Extraocular muscles Oculomotor nucleus Inferior rectus muscle Inferior oblique muscle Trochlear nucleus Abducens nucleus Abducens Nerve Oculomotor Nerve Neural Pathways medicine Animals Motor Neurons Medial rectus muscle Lateral rectus muscle Lizards Cell Biology Anatomy musculoskeletal system eye diseases medicine.anatomical_structure Oculomotor Muscles sense organs Developmental Biology |
| Zdroj: | Anatomy and embryology. 201(1) |
| ISSN: | 0340-2061 |
| Popis: | The topography and localization of motoneurons innervating the six extraocular muscles in the chameleon (Chamaeleo chameleon) was studied following HRP injection in each of these individual muscles. Four muscles were innervated ipsilaterally: medial rectus, inferior rectus, inferior oblique and lateral rectus. The medial rectus muscle was innervated by the dorsomedial part of the oculomotor nucleus. The innervation to the inferior rectus muscle arose from the lateral part of the intermediate oculomotor subnucleus, which extended to the lateral part of the dorsal subdivision. The lateral rectus muscle was innervated by the abducens nucleus, which was composed by two subgroups of labeled cells, respectively observed in the principal and accessory abducens subnuclei, whereas efferents to the inferior oblique muscle originated from both the ventral and intermediate oculomotor subnuclei. The contralateral pattern consisted of motoneurons innervating the superior rectus and the superior oblique that were located respectively in the caudal portion of the ventral oculomotor nucleus and in the trochlear nucleus. These results confirmed data reported in most vertebrate species, and were discussed from a comparative and functional point of view. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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