Evidence for the presence of presynaptic dendrites and GABA-immunogold labeled synaptic boutons in the monkey basilar pontine nuclei.
Two general categories of GABA-immunoreactive (GABA-Ir) boutons are present in the monkey basilar pontine nuclei (BPN). One type characterized by a pale or lucent appearance is involved both in glomerular arrangements that include serial, triadic synapses, and in non-glomerular synapses. The second type of GABA-Ir bouton exhibits a wide variety in size and shape and contains a greater complement of synaptic vesicles than the first type, giving it a darker appearance in comparison to the pale GABA-Ir boutons. Such boutons participate only in non-glomerular synapses. It is suggested that the pale GABA-Ir boutons arise from the intrinsic population of GABA neurons, while the darker appearing boutons might take origin from one of the GABA-ergic afferent systems that reach the BPN.
Mihailoff
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Department of Cell Biology and Neuroscience, University of Texas Southwestern Medical Center, Dallas 75235-9039.
Border
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D000818:Animals; D003712:Dendrites / Q000648:ultrastructure*; D007150:Immunohistochemistry; D008251:Macaca / Q000378:metabolism*; D008252:Macaca fascicularis / Q000033:anatomy & histology / Q000378:metabolism*; D011149:Pons / Q000378:metabolism* / Q000648:ultrastructure; D013569:Synapses / Q000378:metabolism* / Q000648:ultrastructure; D005680:gamma-Aminobutyric Acid / Q000378:metabolism*
D005680:gamma-Aminobutyric Acid