Abstract
AbstractIn order to describe the morphology of dendritic spines of identified neurons in the cat inferior olive together with their gamma‐aminobutyric acid (GABA) synaptic input, a technique was used combining intracellular labeling of horseradish peroxidase with postembedding gold‐immunocytochemistry. With this technique physiologically identified olivary cells were reconstructed with the light microscope, and the horseradish peroxidase reaction product and immunogold labeling were subsequently examined in serial sections at the ultrastructural level. In addition, a degenerating neuron was observed, resulting in a triple labeling in single ultrathin sections.Quantitative and three‐dimensional analysis showed that the dendritic spines were composed of long, thin stalks ending in one or more spine heads. The spines of cells located in the caudal half of the medial accessory olive (type I cells, characterized by dendrites which run away from the soma) were found to be less complex than those, of cells located rostrally in this olivary subnucleus (type II cells, characterized by dendrites which tend to turn back towards the soma). Most, if not all, of the spines of both cell types were located within glomeruli. On average, the spines within individual glomeruli originated from 6 different dendrites (with a maximum of 8). Different spines within the same glomerulus were never derived from different dendrites of the same olivary neuron, but single spines frequently gave rise to several spine heads, which could be located either within different glomeruli or inside a single glomerulus, The glomerular spine heads originating from the same spine were rarely located near one another. All spines and most of the spine heads were contacted by both GABAergic and non‐GABAergic terminals. Most of the GABAergic terminals contained pleomorphical vesicles and displayed symmetric, synapses whereas the non‐GABAergic terminals showed usually round to oval vesicles and asymmetric synapses.
Bibliography
De Zeeuw, C. L., Ruigrok, T. J. H., Holstege, J. C., Jansen, H. G., & Voogd, J. (1990). Intracellular labeling of neurons in the medial accessory olive of the cat: II Ultrastructure of dendritic spines and their gabaergic innervation. Journal of Comparative Neurology, 300(4), 478â494. Portico.
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Dates
Type | When |
---|---|
Created | 20 years, 7 months ago (Jan. 1, 2005, 2:38 p.m.) |
Deposited | 1 year, 10 months ago (Oct. 22, 2023, 9:27 p.m.) |
Indexed | 5 days, 6 hours ago (Aug. 26, 2025, 2:24 a.m.) |
Issued | 34 years, 10 months ago (Oct. 22, 1990) |
Published | 34 years, 10 months ago (Oct. 22, 1990) |
Published Online | 20 years, 10 months ago (Oct. 9, 2004) |
Published Print | 34 years, 10 months ago (Oct. 22, 1990) |
@article{De_Zeeuw_1990, title={Intracellular labeling of neurons in the medial accessory olive of the cat: II Ultrastructure of dendritic spines and their gabaergic innervation}, volume={300}, ISSN={1096-9861}, url={http://dx.doi.org/10.1002/cne.903000404}, DOI={10.1002/cne.903000404}, number={4}, journal={Journal of Comparative Neurology}, publisher={Wiley}, author={De Zeeuw, C. L. and Ruigrok, T. J. H. and Holstege, J. C. and Jansen, H. G. and Voogd, J.}, year={1990}, month=oct, pages={478–494} }