Fine structure and peroxidatic activity of rat blood monocytes |
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| Authors: | Dr H J van der Rhee C P M de Winter W Th Daems |
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| Institution: | (1) Department of Neurophysiology, Walter Reed Army Institute of Research, Washington, D.C., USA;(2) Neurobiology Department, Armed Forces Radiobiology Research Institute, 20014 Bethesda, Maryland, USA |
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| Abstract: | Summary Transmission and scanning electron microscopy of the rat epithalamus shows a regional variation in the distribution of Supraependymal nerves (SN) which correlates well with Supraependymal yellow fluorescence reported by Richards et al. (1974). The medial habenular nucleus, the intercommissural and suprahabenular recesses, the habenular commissure and the fibrae periventriculares thalami have the greatest density of SN/100  m of ependymal surface. The floor of the suprahabenular and intercommissural recesses is covered by non-ciliated ependyma.The significance of these findings is discussed with respect to (1) a direct functional relationship of SN with ependyma, and (2) a possible participation of the non-ciliated ependyma of the suprahabenular and intercommissural recesses in secretory activity whereby the CSF serves as a vehicle for neuroendocrine communication.The author thanks Drs. Sanford Palay, Milton Brightman, and Constantino Sotelo for their advice in the preparation of nervous tissue for electron microscopy; Dr. Gunter Bahr for the use of scanning electron microscopy facilities; and Messrs. Cyril Wingfield and Walter Engler and Mrs. Michie Vane for their technical support |
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| Keywords: | Epithalamus (Rat) Supraependymal nerves Electron microscopy Circumventricular organs Medial habenular nucleus |
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