Study of Hypoglossal Nuclei of Tree Shrews / 昆明医科大学学报

ABSTRACT

Hypoglossal nuclei of tree shrews were studied by the cholerogenoid horseradish peroxidase(CB-HRP)technique Transverse and longitudinal sections were made through the medulla oblongata, and the labelled ceils of the hypoglossal nucleus were studied under a microscope. The nucleus, 1.3-1.4mm in length, is divided into two parts. The upper two-thirds is located in the deep of the eminentia medialis of the fossa rhomboidea and the lower onethird lies ventrilateral to the closed part of the fourth ventricle. Labelled cells in each part may be divided into medial and lateral groups.