Basal lamella

The basal lamella, also known as basal lamella of the middle turbinate, is an osseous lamella that separates the anterior from the posterior ethmoid sinuses 1.


Internal anterior to posterior partitions of the ethmoid sinuses are called basal lamellae. According to a concept proposed by Killian, four or five (if supreme turbinate is included) basal lamellae make up the ethmoid sinuses 2.

The third basal lamella is the only complete basal lamellae, i.e. the only one that reaches the lamina papyracea from the lateral nasal wall 3. As such, the singular term basal lamella refers specifically to the third basal lamella.

The fourth basal lamella separates posterior ethmoid cells into posterior and postreme cells.

Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 59420
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Ground lamella of the middle turbinate
  • Basal lamella of the middle turbinate

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