Smell Sensation


Smell Sensation, Sense of Smell, Olfactory Sensation, Smell Perception

  • Physiology
  1. Substances with odor (odorants) enter nose
  2. Nasal mucosa absorbs odorants
  3. Odorants stimulate olfactory receptors at the Cribiform Plate neuroepithelium
    1. Olfactory receptors regenerate every 8 to 10 days
    2. Followed by 5 days of cilia maturation
  4. Smell-related signals pass via the Olfactory Bulb to the olfactory cerebral cortex
  • Anatomy
  1. Olfactory Nerve and Olfactory Bulb (Cranial Nerve 1)
    1. Primary transmission of Smell Sensation
  2. Trigeminal Nerve (Cranial Nerve 5) - Ophthalmic and Maxillary Divisions
    1. Influence Temperature, irritation and sharpness Sensations