Cortical neurons immunoreactive for the potassium channel Kv3.1b subunit are predominantly surrounded by perineuronal nets presumed as a buffering system for cations. - Härtig,W.; Derouiche,A.; Welt,K.; Brauer,K.; Grosche,J.; Mäder,M.; Reichenbach,A.; Brückner,G. (Brain Res, 1999)