Electrode Placement Locations

Scala Tympani

For the basal turn of the guinea pig cochlea, distances (D) measured on the outside of the cochlea from the "lip" of the round window are approximately D + 0.13 mm from the basal end of the scala (i.e. a pipette inserted into ST at 1 mm from the RW lip corresponds to a location of 1.13 mm in the simulator).
This figure was revised 1/14/2003.

Value	Species	Source	Comment
------------------------	----------------------	------------------------------------	---------------------
Mid basal turn I : 2.1 mm from base Mid turn II: 7.5 mm from base Mid turn III: 11.6 mm from base Mid apical turn IV: 15.1 mm from base	Guinea pig	Salt, 1999 (unpublished data)

Endolymph

Value	Species	Source	Comment
------------------------	----------------------	------------------------------------	---------------------
Mid basal turn I: 4.6 mm from base Mid turn II: 11.4 mm from base Mid turn III: 16.1 mm from base Mid turn apical turn IV: 20.5 mm from base	Guinea pig	Salt, 1999 (unpublished data)

Scala Vestibuli

Value	Species	Source	Comment
------------------------	----------------------	------------------------------------	---------------------
Mid basal turn I: 3.5 mm from base Mid turn II: 8.7mm from base Mid turn III: 12.1 mm from base Mid turn apical turn IV: 15.1 mm from base	Guinea pig	Salt, 1999 (unpublished data)