tympanic sulcus

tympanic sulcus

[TA]
the groove on the inner aspect of the tympanic part of the temporal bone in which the tympanic membrane is fixed.

tympanic sulcus

Etymology: Gk, tympanon, drum; L, sulcus, furrow
a narrow circular groove at the medial end of the osseous part of the external acoustic meatus that holds the tympanic membrane.
References in periodicals archive ?
Bony erosions ranging from 5 to 15 mm were seen just lateral to the tympanic sulcus in 8 of the 16 ears (50%).
The inner surface is grooved by the tympanic sulcus for the attachment of the tympanic membrane, and two bulges, the tympanic tubercles, may be evident.