Two types of neuron are found within the PPT, a small percentage of which project to both the LM-SG and SC.

Autor:	Hoshino, Kaeko, Nagy, Attila, Eördegh, Gabriella, Benedek, György, Norita, Masao
Předmět:	NERVOUS system NEURONS CARBOHYDRATES CHOLINERGIC mechanisms PARASYMPATHETIC nervous system AXONS
Zdroj:	Experimental Brain Research; Apr2004, Vol. 155 Issue 4, p421-426, 6p
Abstrakt:	The pedunculopontine tegmental nucleus (PPT) projects its cholinergic fibers to both the lateralis medialis-suprageniculate nucleus (LM-Sg) and the superior colliculus (SC). For the purpose of verification of whether a single neuron in the PPT projects to both the LM-Sg and the SC, we injected dextran tetramethylrhodamine (DR) into the LM-Sg and dextran fluorescein (DF) into the ipsilateral SC. The DR-positive neurons labeled retrogradely in the PPT are small (mean: 27.13±1.22 µm) and distributed in the rostral two-thirds of this nucleus, whereas the DF-positive neurons are small (mean: 27.54±1.16 µm) or medium-sized (mean: 40.18±1.43 µm), and are located throughout the PPT. Thirty-five percent of all labeled neurons are double-labeled and small. The present study indicates that the PPT projection to the LM-Sg in part involves neurons bifurcating to the SC. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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