1. For the organ of Corti the basilar membrane is permeable to perilymph . 2. Perilymph is found surrounding the sides and the bases of the hair cells.3. Perilymph is low in potassium and high in sodium.4. Perilymph is continuous with cerebrospinal fluid ( CSF ) in the subarachnoid space.5. The wave in the perilymph moves away from the footplate and towards the helicotrema. 6. Both the scala vestibuli and the scala tympani contain an extracellular fluid called perilymph . 7. The RM separates endolymph in the cochlear duct from underlying corticolymph and perilymph of the scala tympani. 8. Its fluid, endolymph, also contains electrolytes and proteins, but is chemically quite different from perilymph . 9. These motors ( outer cells ) amplify the perilymph vibrations that initially incited them over 40-fold. 10. Thus, beta-2 transferrin in otorrhea would be suggestive of either a CSF leak or a perilymph leak.
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