Olfaction

• Odoriferous Stimuli
  • Smell-producing molecules
  • Enter nasal cavity while breathing
  • The odorant molecules must dissolve in the mucous layer (lining the olfactory mucosa) before in contact with olfactory receptors.
• Transduction in the Olfactory Receptor Neurons
  • Cilia – odour detection
  • The transduction are as follows :

Processing of olfactory sensation in olfactory bulb 

• The odorant information is processed extensively and perhaps refined in the olfactory bulb before sending to the olfactory cortex.

 Transmission of odorant information to the Olfactory Cortex and Neocortex.

• The odorant information is transmitted to olfactory cortex (includes piriform cortex,parts of amygdale, olfactory tubercle and parts of entorhinal cortex)
• Then,the information is relayed to the frontal cortex directly and orbitofrontal cortex (via the thalamus).

 

Here is a video explaining about olfactory pathways . Enjoy your listening! 😀