Fine structure of the visual dorsolateral anterior thalamic nucleus of the pigeon (Columba livia): a hodological and GABA-immunocytochemical study

The Journal of Comparative Neurology
D MiceliNatalia B Kenigfest

Abstract

The ultrastructure of the lateroventral subcomponent of the visual dorsolateral anterior thalamic nucleus of the pigeon (DLLv) was analyzed using hodological techniques and GABA-immunocytochemistry. Two types of GABA-immunonegative hyperpalliopetal neurons and a single type of strongly GABA-immunoreactive (-ir) interneuron were identified, the latter displaying long dendrites with some containing synaptic vesicles (DCSV). Ten types of axon terminal were identified and divided into two categories. The first, GABA-immunonegative and making asymmetrical synaptic contact, contain round (RT1, RT2, RT3) or pleiomorphic synaptic and many dense-core vesicles (DCT). RT1 terminals are retinothalamic and RT2 terminals hyperpalliothalamic; both mainly contact dendrites of projection neurons (72% and 78% respectively), less frequently dendrites of interneurons and sometimes DCSV; RT1 terminals are rarely involved in synaptic triads. The second category are consistently GABA-immunopositive. Four types (PT1-4), distinguished by their pleiomorphic synaptic vesicles, make symmetrical synaptic contact essentially with dendrites of projection neurons, more rarely on dendrites of interneurons (PT2). PT1 terminals are very probably those of interne...Continue Reading

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Citations

Nov 13, 2010·Biological Reviews of the Cambridge Philosophical Society·Niels C RattenborgVladimir V Pravosudov
Apr 8, 2011·Zhurnal evoliutsionnoĭ biokhimii i fiziologii·M G BelikhovaT V Chudinova
Apr 2, 2015·Integrative and Comparative Biology·Michael B Pritz
Sep 19, 2019·The Journal of Comparative Neurology·Máximo FernándezGonzalo J Marín
Nov 23, 2017·Frontiers in Behavioral Neuroscience·Paulo E JorgeJohn B Phillips

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