Fig. 5From: Apoptotic action of botulinum toxin on masseter muscle in rats: early and late changes in the expression of molecular markersAnalysis of TEM of muscular tissue 2 weeks after BTX-A or saline injection. Shrunken nuclei with chromatin condensation (Nu) was evident in both BTX-A-treated groups. Swollen mitochondria (Mt) with aberrant cristae were sporadically found. Mitochondria with aberrant cristae (Mt) in the 10 U BTX-A-treated group was encompassed by membranes and underwent autophagy formationBack to article page