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Head And Neck Case Study

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Head and Neck Case Study Allison Quelch

1. What is the name of the foramen at the lower end of the canal, through which the nerve emerges from the skull?
The name of the foramen at the lower end of the canal, through which the nerve emerges from the skull is the Stylomastoid foramen.

a. Is this also the site of entrance of an artery that supplies the facial nerve within the canal?
Yes, the stylomastoid artery enter the stylomastoid foramen and supplies the external acoustic meatus, mastoid cells, semicircular canals, stapedius muscle, and vestibule. b. Of what artery is it most commonly a branch?
The stylomastoid artery is a branch of the posterior auricular artery.

2. How do you explain the disappearance of wrinkles of the …show more content…

The inability to purse the lips and show the teeth of the affected side is due to paralysis of which muscle?
The inability to purse the lips and show the teeth of the affected side is due to paralysis of the orbicularis oris facial muscle, which is innervated by the facial nerve (N VII).

b. The absence of the mimic expression of smile and laughter is the result of the dysfunction of numerous facial muscles; name four.
The absence of the mimic expression of smile and laughter is a result of the dysfunction of the facial muscles levator anguli oris, depressor anguli oris, zygomaticus major and zygomaticus minor. First, the levator anguli oris raises the corners of the mouth. Then, the depressor anguli oris depresses and draws the corner of the mouth laterally. Next, the zygomaticus major elevates the corners of the mouth up and draw them in laterally. Last, the zygomaticus minor elevates the upper lip.

c. Each of these muscle have which three characteristics in common?
These muscles all contribute to the movement of the mouth, are innervated with the facial nerve (N VII), and insert around the mouth.

5. Would their paralysis give any clue as to the site of attack of the noxious

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