Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 2
pubmed:dateCreated
2002-3-15
pubmed:abstractText
Layer 7 is one of the retinorecipient layers of the avian optic tectum. However, little information is available about the neuronal organization of this layer and its implications for visual function. Golgi impregnation was used to investigate the retinal input to and the neuronal architecture of layer 7 of the chick optic tectum, which forms a narrow band between the two cell-dense layers 6 and 8. Anterograde tracers were also used to investigate the afferent and efferent connections of layer 7, in both the light and the electron microscope, together with GABA immunogold labelling. Three types of radial neuron were defined according to the origin and course of their axons. The perikarya of these neurons were situated in tectal layers 10-11. The principal dendrites of these radial neurons ascended to the tectal surface and gave rise to dendritic side-branches in layer 7. These dendritic side-branches received asymmetric synapses from the terminations of retinal fibre arborisations. Type 2 radial neurons, whose axons arose from the deep pole of the perikaryon or occasionally from a basal dendrite, were shown to project to the nucleus isthmi pars magnocellularis, which has previously been demonstrated to be GABAergic and to project to glomerulus-like complexes in tectal layers 4-5. In these layers, the dendritic branches of layer 13 neurons that project to the nucleus rotundus have previously been shown to receive retinal fibre input. Therefore, the retinal input to layer 7 may be able to modulate the transmission of information to the visual thalamus, by way of a feed-back loop to layers 4-5 of the tectum involving the nucleus isthmi pars magnocellularis.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-1004710, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-1150928, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-1270632, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-13881865, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-1783031, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-2579124, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-2984257, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-5334899, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-5459211, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-6198041, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-62764, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-62765, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-6279426, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-6621934, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-72364, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-7605942, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-7914015, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-8157485, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-9426312, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-9624592, http://linkedlifedata.com/resource/pubmed/commentcorrection/11895115-9831770
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0021-8782
pubmed:author
pubmed:issnType
Print
pubmed:volume
200
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
169-83
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
The ramification and connections of retinal fibres in layer 7 of the domestic chick optic tectum: a golgi impregnation, anterograde tracer and GABA-immunogold study.
pubmed:affiliation
Department of Anatomy Histology and Embryology, Semmelweis University, Faculty of Medicine, Budapest, Hungary.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't