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Perilymph is one of the two types of cochlear fluids, the other being endolymph. It is located in the scala vestibuli and scala tympani of the cochlea.

It is a clear fluid with an ionic composition very similar to cerebrospinal fluid as the scala tympani and scala tympani communicate directly with the subarachnoid space. It has a high level of sodium (Na+) ions and helps to generate the endolymphatic potential.

The endolymph and perilymph do not normally communicate.

See also

Anatomy: Head and neck

Anatomy: Head and neck

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Article information

rID: 55298
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Perilymph fluid

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