Michael:

Have a look at this link for insights:

http://www.scielo.br/pdf/bjb/v69n1/22.pdf

Best

Syed

Thank you very much. In particular, I am interested in differences in the anatomy of the inner ear labyrinth.

Michael:

Could this link be of some interest to you?

http://onlinelibrary.wiley.com/doi/10.1002/ar.a.20142/pdf

Best

Syed

Dear Micheal,

Please check the links below.

Best wishes

SM Najim

http://link.springer.com/article/10.1007/s00359-011-0651-8

http://jeb.biologists.org/content/212/14/2204 

Thank you very much for your helpful answers.

Malcolm Miller (Miller M, Quantitative Studies of Auditory Hair Cells and Nerves in Lizards, J Comp Neurol 232, 1-24, 1985 looked quantitatively at left-right differences in hair cells and nerve fibers of lizards. He wrote:

"Reports dealing with the difference between the number

of nerve fibers innervating the right and left ears of individual

animals are rare and the data inadequate for comparison

with my studies. Rasmussen (’40), in his study of 40

human auditory nerves, reported a mean difference of 4,700

fibers between the ears of individuals. A rough estimate of

variation obtained by dividing the right-left ear differences

by the mean (31,400) would be 15%, a value approximately

twice that found in lizards."

Rasmussen, A.T. (1940) Studies ofthe VIIIth cranial nerve of man. Laryn~

goscope 5037-83.

Best regards,

Geoff Manley

Sorry, I hit the respond button too early. Miller 1985 also says about different sexes:

"There is no correlation between hair cell number-and age

(age in lizards is proportional to the size of an animal

usually expressed as the snout-vent length), sex, or sidedness

(right or left ear) in any lizard species."

Otherwise I know that male and female humans differ in the occurrence of spontaneous otoacoutic emissions from the ear, but no-one has yet found a morphological correlate of that.

Geoff Manley

Thank you very much for your helpful answer.

Best regards,

Michael Laaß

http://link.springer.com/article/10.1007/s10914-016-9323-3