Muscles of facial expression

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1. 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.
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2. Where are the facial muscle located? What are they innervated by?

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

3. Where does procerus orginate from

  • 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
  • Its is the most superior muscle in the nasal muscles and attaches onto the skin above zygomatic bone

4. 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)

5. What is it called when the cornea becomes exposed and dries out?

  • inclosure Occulis
  • exposure Occulis
  • exposure keratitis
  • inclosure keratitis

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