QS Study

The olfactory pathway is the pathway of smell. The association of the olfactory pathways is very difficult and not yet well understood. It is known that the olfactory receptors situated in the similar region of the mucosa send their information to the similar glomeruli. The main pathway is through the nose, and the second pathway is through the mouth via the pharynx. After making their way into the nasal cavity, odorant molecules travel to the olfactory mucosa, an area about the size of a dime located in the nasal cavity.

Pathway of Olfaction

  • Olfactory mucosa or cell receptor (1st order neuron),
  • Olfactory nerve,
  • Olfactory bulb ( Glomerular complex) Granule cell and mitral cell (2nd order neuron),
  • Olfactory tract,
  • Limbic system (Anterior perforated substances, amygdala, prepiriform cortex).

The pathway involves structures that primarily constitute the pathway itself, and two groups of structures that constitute its projections, that is, into which fibers from the olfactory pathway terminate.