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. 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.

3. Which of these muscles are not part of the orbital group?

  • Procerus (eyebrows)
  • Obcularis Oculi - outer orbital part
  • Obcularis Oculi - inner palpebral part
  • Corrugator Supercilli

4. 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

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

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