Abstract
The distribution of abducens nucleus motoneurons and internuclear neurons was determined in the pigeon (Columbia livia) by injecting horseradish peroxidase or fluorochromes into the ipsilateral lateral rectus muscle and/or in the contralateral oculomotor nucleus. A small degree of intermingling of motoneurons and internuclear neurons in the caudal two thirds of the nucleus and an almost complete segregation of both types of neurons in the rostral third was observed. Both labelled populations, motoneurons and internuclear neurons, were more numerous at the central part of the abducens nucleus. Motoneurons were preferentially located nearer the medial longitudinal fasciculus and less numerous at the rostral end of the nucleus. Internuclear neurons were preferentially located further from the medial longitudinal fasciculus and were less abundant at the caudal end of the nucleus. The evolutionary trend of the relative location of both types of neurons is discussed in relation to the degree of conjugate eye movements.
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- Brecha N., Karten H. J., Hunt S. P. Projections of the nucleus of the basal optic root in the pigeon: an autoradiographic and horseradish peroxidase study. J Comp Neurol. 1980 Feb 15;189(4):615–670. doi: 10.1002/cne.901890404. [DOI] [PubMed] [Google Scholar]
- Cabrera B., Portillo F., Pásaro R., Delgado-García J. M. Location of motoneurons and internuclear neurons within the rat abducens nucleus by means of horseradish peroxidase and fluorescent double labeling. Neurosci Lett. 1988 Apr 22;87(1-2):1–6. doi: 10.1016/0304-3940(88)90135-8. [DOI] [PubMed] [Google Scholar]
- Delgado-Garcia J. M., del Pozo F., Baker R. Behavior of neurons in the abducens nucleus of the alert cat--I. Motoneurons. Neuroscience. 1986 Apr;17(4):929–952. doi: 10.1016/0306-4522(86)90072-2. [DOI] [PubMed] [Google Scholar]
- Delgado-Garcia J. M., del Pozo F., Baker R. Behavior of neurons in the abducens nucleus of the alert cat--II. Internuclear neurons. Neuroscience. 1986 Apr;17(4):953–973. doi: 10.1016/0306-4522(86)90073-4. [DOI] [PubMed] [Google Scholar]
- Galifret Y. Les diverses aires fonctionnelles de la rétine du pigeon. Z Zellforsch Mikrosk Anat. 1968;86(4):535–545. [PubMed] [Google Scholar]
- Glicksman M. A. Localization of motoneurons controlling the extraocular muscles of the rat. Brain Res. 1980 Apr 21;188(1):53–62. doi: 10.1016/0006-8993(80)90556-9. [DOI] [PubMed] [Google Scholar]
- Gomez Segade L. A., Labandeira Garcia J. L. Location and quantitative analysis of the motoneurons innervating the extraocular muscles of the guinea-pig, using horseradish peroxidase (HRP) and double or triple labelling with fluorescent substances. J Hirnforsch. 1983;24(6):613–626. [PubMed] [Google Scholar]
- Gonzalez A., Munoz M. Distribution and morphology of abducens motoneurons innervating the lateral rectus and retractor bulbi muscles in the frog Rana ridibunda. Neurosci Lett. 1987 Aug 18;79(1-2):29–34. doi: 10.1016/0304-3940(87)90667-7. [DOI] [PubMed] [Google Scholar]
- Graybiel A. M., Hartwieg E. A. Some afferent connections of the oculomotor complex in the cat: an experimental study with tracer techniques. Brain Res. 1974 Dec 13;81(3):543–551. doi: 10.1016/0006-8993(74)90850-6. [DOI] [PubMed] [Google Scholar]
- Highstein S. M., Karabelas A., Baker R., McCrea R. A. Comparison of the morphology of physiologically identified abducens motor and internuclear neurons in the cat: a light microscopic study employing the intracellular injection of horseradish peroxidase. J Comp Neurol. 1982 Jul 10;208(4):369–381. doi: 10.1002/cne.902080407. [DOI] [PubMed] [Google Scholar]
- Kuypers H. G., Bentivoglio M., Catsman-Berrevoets C. E., Bharos A. T. Double retrograde neuronal labeling through divergent axon collaterals, using two fluorescent tracers with the same excitation wavelength which label different features of the cell. Exp Brain Res. 1980;40(4):383–392. doi: 10.1007/BF00236147. [DOI] [PubMed] [Google Scholar]
- Labandeira Garcia J. L., Gomez Segade L. A., Suarez Nuñez J. M. Localisation of motoneurons supplying the extra-ocular muscles of the rat using horseradish peroxidase and fluorescent double labelling. J Anat. 1983 Sep;137(Pt 2):247–261. [PMC free article] [PubMed] [Google Scholar]
- Labandeira-Garcia J. L., Guerra-Seijas M. J., Segade L. A., Suarez-Nuñez J. M. Identification of abducens motoneurons, accessory abducens motoneurons, and abducens internuclear neurons in the chick by retrograde transport of horseradish peroxidase. J Comp Neurol. 1987 May 1;259(1):140–149. doi: 10.1002/cne.902590110. [DOI] [PubMed] [Google Scholar]
- Langer T., Kaneko C. R., Scudder C. A., Fuchs A. F. Afferents to the abducens nucleus in the monkey and cat. J Comp Neurol. 1986 Mar 15;245(3):379–400. doi: 10.1002/cne.902450307. [DOI] [PubMed] [Google Scholar]
- McCrea R. A., Strassman A., Highstein S. M. Morphology and physiology of abducens motoneurons and internuclear neurons intracellularly injected with horseradish peroxidase in alert squirrel monkeys. J Comp Neurol. 1986 Jan 15;243(3):291–308. doi: 10.1002/cne.902430302. [DOI] [PubMed] [Google Scholar]
- McFadden S. A., Reymond L. A further look at the binocular visual field of the pigeon (Columba livia). Vision Res. 1985;25(11):1741–1746. doi: 10.1016/0042-6989(85)90147-6. [DOI] [PubMed] [Google Scholar]
- Meredith M. A., McClung J. R., Goldberg S. J. Retractor bulbi muscle responses to oculomotor nerve and nucleus stimulation in the cat. Brain Res. 1981 May 4;211(2):427–432. doi: 10.1016/0006-8993(81)90968-9. [DOI] [PubMed] [Google Scholar]
- Schmued L. C., Fallon J. H. Fluoro-Gold: a new fluorescent retrograde axonal tracer with numerous unique properties. Brain Res. 1986 Jul 2;377(1):147–154. doi: 10.1016/0006-8993(86)91199-6. [DOI] [PubMed] [Google Scholar]
- Spencer R. F., Baker R., McCrea R. A. Localization and morphology of cat retractor bulbi motoneurons. J Neurophysiol. 1980 Mar;43(3):754–770. doi: 10.1152/jn.1980.43.3.754. [DOI] [PubMed] [Google Scholar]
- Spencer R. F., Porter J. D. Innervation and structure of extraocular muscles in the monkey in comparison to those of the cat. J Comp Neurol. 1981 Jun 1;198(4):649–665. doi: 10.1002/cne.901980407. [DOI] [PubMed] [Google Scholar]
- Spencer R. F., Sterling P. An electron microscope study of motoneurones and interneurones in the cat abducens nucleus identified by retrograde intraaxonal transport of horseradish peroxidase. J Comp Neurol. 1977 Nov 1;176(1):65–85. doi: 10.1002/cne.901760105. [DOI] [PubMed] [Google Scholar]
- Steiger H. J., Büttner-Ennever J. Relationship between motoneurons and internuclear neurons in the abducens nucleus: a double retrograde tracer study in the cat. Brain Res. 1978 Jun 9;148(1):181–188. doi: 10.1016/0006-8993(78)90387-6. [DOI] [PubMed] [Google Scholar]
- Wallman J., Pettigrew J. D. Conjugate and disjunctive saccades in two avian species with contrasting oculomotor strategies. J Neurosci. 1985 Jun;5(6):1418–1428. doi: 10.1523/JNEUROSCI.05-06-01418.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]