Muscles Of Mastication: Nerve supply

Muscles Of Mastication

Describe muscles of mastication under headings:
Origin Insertion Nerve supply Action (e) Applied aspect
Answer:

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muscles of mastication Applied Aspects:

1. Masseter muscle
   • It can be palpated both intraorally and extraorally
   • Common muscle involved in myositis ossificans
   • It shows dual action in complete denture
   • It commonly undergoes hypertrophy in bruxism
2. Temporalis muscle
   • Sudden contraction of it results in coronoid fracture
3. Lateral pterygoid
   • Commonly involved muscle in MPDS
   • Only muscle of mastication which has attachment to the TMJ
   • It forms roof of pterygomandibular space
4. Medial pterygoid
   • It can be palpated only intraorally
   • Commonly involved in MPDS
   • Trismus following inferior alveolar nerve block is mostly due to involvement of medial pterygoid muscle