Parvocellulaire neurosecretoire cellen zijn kleine zenuwcellen die door de hypothalamus-afgevende en remmende hormonen produceren. De cellichamen van deze zenuwcellen bevinden zich in verschillende kernen van de hypothalamus of in nauw verwante gebieden van de basale hersenen, voornamelijk in de mediale zone van de hypothalamus. Alle of de meeste axonen van de parvocellulaire neurosecretoire cellen projecteren naar de mediane eminentie, aan de basis van de hersenen, waar hun zenuwuiteinden de hypothalamische hormonen vrijgeven. Deze hormonen worden vervolgens onmiddellijk opgenomen in de bloedvaten van de hypofysepoortader, die ze naar de hypofysevoorkwab transporteren, waar ze de afscheiding van hormonen in de systemische circulatie reguleren.
De parvocellulaire neurosecretoire cellen produceren het volgende:
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