brain part

Details about PIR.
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Hierarchy level in atlas Swanson, version Swanson-1992 is 4: 3 superstructures include it.

Major Subparts
PartType
Piriform area molecular layergray matter
Piriform area pyramidal layergray matter
Piriform area polymorph layergray matter
  
Tree of Piriform area

Brain
Forebrain
Olfactory cortex