- Donaldson’s Line is an intraoperative anatomic landmark used to help locate the endolymphatic sac.
- Donaldson’s line is an imaginary line drawn parallel to the horizontal semicircular canal that bisects the posterior semicircular canal.
- The endolymphatic sac will lie inferior to Donaldson’s line.
Temporal Bone Dissection (Donaldson’s Line)
Last updated December 26, 2023