Abstract
Changes in suceinic dehydrogenase, adenosine triphosphatase, and phosphorylase activities occurred in masseter muscle by 15 minutes following injeetion of 2% lidocaine. Abolishment of phosphorylase activity suggested an effect on the sarcoplasmic retieulum. Increased staining for succinic dehydrogenase and adenosine triphosphatase activities suggested damage to mitochondria and myofibrils, respectively. Leucine aminopeptidase and glucose-6-phosphate dehydrogenase activities appeared in macrophages.
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