Rhinencephalon

RHINENCEPHALON

Olfactory bulbs

  • These are oval elongated structures in each hemisphere, situated at the anteroventral aspect of the frontal pole and are lodged in the olfactory fossae.
  • Each bulb receives olfactory nerves coming from the nasal mucosa through the olfactory perforations of the cribriform plate of the ethmoid bone.
  • The olfactory tract is a thick and short bundle of fibres that extends back wards and divides into medial and lateral olfactory stria.
  • The trigonum olfactorium is a triangular area placed between the two stria.
  • The lateral stria is longer and passes backward and outward along the medial aspect of rhinal sulcus and enters the inferior part of the hippocampal involutions.
  • The inner one passes backward and inward to the internal aspect of the cerebral hemisphere.

Last modified: Sunday, 16 October 2011, 5:42 AM