Muscles of facial expression

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1. Where does procerus orginate from

  • Its is the most superior muscle in the nasal muscles and attaches onto the skin above zygomatic bone
  • it orginates from the nasal bone and inserts onto the lower medial forehead -pulls eyebrows medially cause vertical wrinkles
  • it orginates from the nasal bone and inserts onto the upper forehead -raises eyebrows medially cause horizontally wrinkles
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2. Insertion, function of the largest muscle in the nasal group.

  • Nasalis, inserts= transverse part to the aponeurosis at the dorsum of the nose (compreses flares). Alar part to the alar cartilage of nasoskeleton (inflares nostrils)
  • Nasalis, inserts= into the maxilla (inflares nostrils)
  • Deppresor septi nasi, inserts= transverse part to the aponeurosis at the dorsum of the nose (compreses flares). Alar part to the alar cartilage of nasoskeleton (inflares nostrils)

3. Where are the facial muscle located? What are they innervated by?

  • in deep cutaneous tissue by cranial nerve
  • in subcutaneous tissue, by facial nerve
  • in thoracolumbal fascia by facial nerve

4. what is ectropion?

  • when the lower lid droops this results in lacrimal fluid builds up and not spread accross the surface. so debris builds up and causes ulceration of cornea.
  • when the upper lid droops this results in lacrimal fluid builds up and not spread accross the surface. so debris builds up and causes ulceration of cornea.

5. which muscles blends with the obcularis oris?

  • Buccinator wich has infermedial direction fibres, and prevents accumulation of food in the cheeks
  • Obcularis palpebra part and orbital part. Palpebra part contracts muscle softly, and orbital part contracts strongly

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