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2. Olfactory nerve

  1. Is the first cranial nerve (CN I). (T/F?)
  2. Is the second shortest of the cranial nerves. (T/F?)
  3. Emanates from the brainstem like all of the cranial nerves. (T/F?)
  4. Travels through cribriform plate of the ethmoid bone. (T/F?)
  5. Tumors of the frontal lobe of the brain can cause damage to the olfactory nerve. (T/F?)
  6. Lesions of the olfactory nerve  lead to a reduced ability to sense pain from the nasal epithelium. (T/F?)

  1. T
  2. F
  3. F
  4. T
  5. T
  6. F

    1. Olfactory nerve is the shortest of the cranial nerves.
    2. Olfactory nerve fibers arise from olfactory receptor cells located in the olfactory epithelium in the upper parts of the nasal cavity. They pass through the cribiform plate of the ethmoid bone to synapse in the olfactory bulb which lays in the anterior cranial fossa. The only other cranial nerve that does not join the brainstem is optic nerve.

By Patrick J. Lynch, medical illustrator (Patrick J. Lynch, medical illustrator) [CC BY 2.5], via Wikimedia Commons

  1. Pain from the nasal epithelium is carried to the central nervous system by the maxillary nerve.