Fig. 2From: Stimulation-induced structural changes at the nucleus, endoplasmic reticulum and mitochondria of hippocampal neuronsNeuronal mitochondria are classified as “not swollen” if the matrix (marked by *) is dark (a), or “swollen” if the matrix is light (* in b, c). Images taken from dissociated hippocampal cultures treated for 2 min with calcium-free medium containing EGTA (1 mM; a), control medium (b), and high K+ medium (90 mM; c). Scale bar = 0.1 μmBack to article page