In mammals, some GABAergic neurons, such as chandelier cells, are also able to excite their glutamatergic counterparts.

Chandelier neurons or chandelier cells are a subset of GABA-ergic cortical interneurons.

SRF interviews David Lewis - an interview touching on the GABAergic neuronal dysfunction in schizophrenia and the role of the chandelier cells.

They are described as parvalbumin-containing and fast-spiking to distinguish them from other subtypes of GABAergic neurons, although more recent work has suggested that only a subset of chandelier cells test positive for parvalbumin by immunostaining.