Masticator Space

  • The masticator space:
    • Is one of the seven deep compartments of the head and neck
  • Gross anatomy:
    • The masticator space are:
      • Paired suprahyoid cervical spaces:
        • On each side of the face
    • Each space is enveloped by:
      • The superficial layer of the deep cervical fascia:
        • The superficial layer of deep cervical fascia:
          • Splits into two at the lower border of the mandible:
            • The inner layer:
              • Running deep to the medial pterygoid muscle and attaches to the skull base medial to foramen ovale and
            • The outer layer:
              • Covering the masseter and temporalis muscles and attaches to the parietal calvaria superiorly
  • Contents:
    • Muscles of mastication
    • Ramus and body of mandible
    • Inferior alveolar nerve
    • Inferior alveolar vein and artery
    • Mandibular division of the trigeminal nerve (V3):
      • Enters the masticator space:
        • Via the foramen ovale
    • Pterygoid venous plexus
  • Boundaries and relations:
    • Anteriorly:
      • The buccal space
    • Posterolaterally:
      • Parotid space
    • Medially:
      • Parapharyngeal space
  • Communications:
    • Masticator space malignancies can spread perineurally:
      • Via the mandibular division of the trigeminal (V3) nerve:
        • Into the middle cranial fossa

#Arrangoiz #HeadandNeckSurgeon #CancerSurgeon #surgicalOncologist #Teacher

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