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- W1991926327 abstract "Recent whole-cell recordings show that there are multiple synaptic inputs to the accessory optic system of the pond turtle Pseudemys scripta elegans (the basal optic nucleus, BON), suggesting a complex role in visual processing. The BON outputs have now been investigated using transport of diI, rhodamine-conjugated and biotinylated dextrans. Although transport was primarily anterograde, contralateral retinal ganglion cells were labeled retrogradely, confirming that the injection site was a retinal target. Other retrogradely labeled neurons were found ipsilateral to the injection site, in the pretectum, the ventral tegmentum, the dorsal nucleus of the posterior commissure and the lateral habenular nucleus. However, other data indicate that the habenular cells were labeled by spread of the tracer from the BON to the adjacent fasciculus retroflexus and interpeduncular nucleus. Anterogradely labeled fibers projected from BON following three paths, a lateral bundle to the ipsilateral dorsal midbrain, an intermediate bundle to the ipsilateral pretectal area or the posterior commissure and a ventral fiber bundle to the tegmentum bilaterally. Some of these fibers projected caudally through the tegmentum and cerebellar peduncle to terminate just below the Purkinje cell layer of the cerebellar cortex. Fibers that coursed via the intermediate bundle to the posterior commissure were also seen reaching the contralateral pretectal area and the contralateral BON. Injections of the retrograde tracer Fluorogold were also made in the BON to confirm the reciprocal connectivity of both basal optic nuclei. The pathways revealed by these experiments indicate the existence of multiple afferent and efferent connections of the BON, supporting the view that the accessory optic system is more than a simple relay of retinal signals into the brainstem for optokinetic reflexes." @default.
- W1991926327 created "2016-06-24" @default.
- W1991926327 creator A5000607473 @default.
- W1991926327 creator A5071774929 @default.
- W1991926327 creator A5089377843 @default.
- W1991926327 date "2003-10-01" @default.
- W1991926327 modified "2023-09-28" @default.
- W1991926327 title "Connectivity of the turtle accessory optic system" @default.
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- W1991926327 doi "https://doi.org/10.1016/s0006-8993(03)03371-7" @default.
- W1991926327 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/14519514" @default.
- W1991926327 hasPublicationYear "2003" @default.
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