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Electromyography after lateral pterygoid myotomy in monkeys
Journal of Oral Surgery (American Dental Association : 1965)
|September 1, 1979
Summary
Lateral pterygoid myotomy in rhesus monkeys did not permanently impair muscle function. Bilateral muscle activity returned to preoperative patterns within two months, regardless of surgical interventions to prevent reattachment.
Area of Science:
- Neuromuscular physiology
- Masticatory muscle function
- Primate jaw mechanics
Background:
- The lateral pterygoid muscle is crucial for jaw movement.
- Understanding the long-term effects of surgical interventions on this muscle is important for clinical practice.
Purpose of the Study:
- To investigate the functional recovery of the lateral pterygoid muscle after myotomy in rhesus monkeys.
- To determine if surgical intervention impacts long-term masticatory muscle function.
Main Methods:
- Electromyography was used to record neuromuscular patterns in five female rhesus monkeys.
- Activity of the lateral pterygoid muscle was monitored at various postoperative intervals.
- Surgical techniques included myotomy with and without an inert barrier to assess reattachment effects.
Main Results:
- Lateral pterygoid muscle activity was detectable as early as four days postoperatively.
- Bilateral lateral pterygoid muscle activity returned to preoperative patterns within two months in all subjects.
- Muscle function recovery was consistent, irrespective of whether an inert barrier was used.
Conclusions:
- Lateral pterygoid myotomy does not result in long-term inhibition of lateral pterygoid muscle function.
- The masticatory system demonstrates significant functional resilience following lateral pterygoid muscle surgery.
- These findings suggest potential for recovery in similar clinical scenarios.