Subject: A question on B=?UTF-8?Q?=C3=A9k=C3=A9sy.?= From: "reinifrosch@xxxxxxxx" <reinifrosch@xxxxxxxx> Date: Fri, 19 Mar 2010 13:20:18 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Dear colleagues, At the bottom of page 475 of his book "Experiments in Hearing", McGraw-Hill, New York, von Békésy (1960) has written: "[...] It was further established that the gelatinous mass in the cochlear duct increased the rigidity of the partition, especially near the helicotrema. [...]" What is that "gelatinous mass"? I seem to remember that the viscosity of endolymph is about equal to that of water. A wild guess: "gelatinous mass" = tectorial membrane (??) Your (on- or off-line) suggestions would be very welcome, of course, even if you are not absolutely sure ! Reinhart. Reinhart Frosch, Dr. phil. nat., r. PSI and ETH Zurich, Sommerhaldenstr. 5B, CH-5200 Brugg. Phone: 0041 56 441 77 72. Mobile: 0041 79 754 30 32. E-mail: reinifrosch@xxxxxxxx .