Definition
Perilymph is a fluid located within the bony labyrinth of the inner ear, surrounding the membranous labyrinth. π§ It has an ionic composition similar to extracellular fluid and cerebrospinal fluid. It cushions and protects the inner ear structures. Think of it as a protective bath for the delicate inner ear. Changes in perilymph volume or composition can affect hearing and balance. It is critical for inner ear health.