Search PubMed⌕ Search

Biomedical subjects

B Cabrera

Publications and source records attributed to B Cabrera.

24 records · Page 2Linked to original sources
PubMed1989

Cytoarchitectonic organisation of the abducens nucleus in the pigeon (Columbia livia).

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.

Abducens Nerve↗
PubMed1988

Location of motoneurons and internuclear neurons within the rat abducens nucleus by means of horseradish peroxidase and fluorescent double labeling.

The distribution of abducens motoneurons and internuclear neurons was determined in the rat by injections of horseradish peroxidase or fluorochromes into the ipsilateral lateral rectus muscle and the contralateral oculomotor nucleus either separately or simultaneously. The labeled somata of abducens internuclear neurons were intermingled with the labeled motoneurons at the medial third of the nucleus, but they were more segregated at the rostral third, where the labeled interneurons were more numerous. Internuclear neurons were preferentially located around and ventral to the central part of the facial genu, while motoneurons were located more dorsomedially, closer to the midline than in other species of mammals. The evolutionary trend of the location of both populations of neurons is also discussed.

Abducens Nerve↗