Immunocytochemical and ultrastructural identification of luteinizing hormone-releasing hormone (LH-RH)-containing neurons in the vascular organ of the lamina terminalis (OVLT) of the squirrel monkey.

By comparison of immunocytochemical data and classical electron microscopic results, luteinizing hormone-releasing hormone (LH-RH)-immunoreactive neurons are described in the vascular organ of the lamina terminalis (OVLT) of the squirrel monkey. These cells contain neurosecretory granules (NSG) essentially located at their periphery. The rough endoplasmic reticulum and the Golgi apparatus are well developed. Some NSG are also associated with the Golgi complex. Nerve endings containing NSG are observed at the surface of the ependymocytes.