Electron microscopic identification of lamina I axon terminations in the nucleus submedius of the cat thalamus.
Ascending lamina I axons were labeled with Phaseolus vulgaris leucoagglutinin and the synaptic connections of their terminals in nucleus submedius (Sm) were studied in the electron microscope. The terminals were large, contained rounded synaptic vesicles, and were involved in complex synaptic aggregations with pre- and postsynaptic dendrites. It was observed that clustered large boutons from a single axon could contact a single dendritic shaft. These observations support a sensory role for lamina I input to Sm.
Blomqvist
A
A
Department of Cell Biology, Faculty of Health Sciences, University of Linköping, Sweden.
Ericson
A C
AC
Broman
J
J
Craig
A D
AD
D000818:Animals; D001369:Axons / Q000648:ultrastructure*; D002415:Cats / Q000502:physiology*; D008854:Microscopy, Electron; D009411:Nerve Endings / Q000648:ultrastructure; D009412:Nerve Fibers / Q000648:ultrastructure; D010835:Phytohemagglutinins; D013787:Thalamic Nuclei / Q000648:ultrastructure*
D010835:Phytohemagglutinins; C100156:leukoagglutinins, plants