[Supra-ependymal "giant"" nerve terminals in rodent brains]

In the lateral ventricles and third ventricle of the Rat and Mouse brain a dense net of supraependymal amyelinic varicose axons is obvious. Moreover, orginating from this was found small quantities of "giant" supra-ependymal nerve endings evoking sometimes the aspect of sensory terminals. These two types of supra-ependymal structures seem to contain 5-hydroxytryptamine.