What does the term skull base mean?

The term “skull base” refers to the bottom of the skull or the plate of bone upon which the brain sits.

The skull base is an important area of the head that separates the brain from the other anatomic structures in the head. The skull base contains many openings. Nerves and blood vessels travel through these openings.

The following bones make up the skull base:

  • ethmoid
  • sphenoid
  • occipital
  • paired frontal
  • paired temporal bones

The skull base can be subdivided into the following parts:

  • anterior
  • middle
  • posterior cranial fossae
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Source: https://www.cedars-sinai.edu/Education/Medical-Library/

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