1. Polysomnography shows increased masseter and temporalis muscular activity during sleep. 2. AVE at 10 Hz produced deep masseter muscle relaxation and finger warming within six minutes. 3. In herbivores, the crushing force of the masseters is relatively more important than is shearing. 4. Unlike hystricomorphous and myomorphous rodents, the medial masseter muscle does not pass through the infraorbital canal. 5. The masseter muscle does attach directly behind the zygomatic arch in a manner very different from sciuromorphs. 6. Here the nerve stimulator can be used in identifying the donor motor nerve to the masseter muscle. 7. With progression the illness involves the pectoral girdle and trunk muscles and finally the masseters and temporal muscles. 8. The skull is protrogomorphous; it has no specialized attachments for the masseter muscles as seen in other rodents. 9. A sciuromorphous zygomasseteric system is characterized by attachment of the lateral masseter muscle along the side of the rostrum. 10. The infraorbital canal is enlarged, presumably allowing for the passage of the medial masseter muscle as with other hystricomorphs.
Mobile