Table 2.
Landmarks.
| N° | Name | Definition |
|---|---|---|
| 1 | Helix basis | Centre of the first turn of the cochlea (within the plane defined by the first turn of the cochlea) |
| 2 | Helix apex | Centre of the last turn of the cochlea (within the plane defined by the last turn of the cochlea) |
| 3 | Helix anteromedial | Anteromedial-most point at the centre of the lumen of the first turn of the cochlea |
| 4 | Helix posterolateral | Posterolateral-most point at the centre of the lumen of the first turn of the cochlea |
| 5 | Helix inferior | Inferior-most point at the centre of the lumen of the first turn of the cochlea |
| 6 | Helix superior | Superior-most point at the centre of the lumen of the first turn of the cochlea |
| 7 | Fenestra cochlea | Centre of the round window |
| 8 | Fenestra vestibuli | Centre of the oval window |
| 9 | Aquaeductus vestibuli | Opening of the vestibular aqueduct in the vestibular wall |
| 10 | Crus commune apex | Bifurcation point of the common crus |
| 11 | Canalis lateralis ampulla | Centre of the ampulla of the lateral semicircular canal |
| 12 | Canalis lateralis posteromedial | Posteromedial-most point at the centre of the lumen of the lateral semicircular canal |
| 13 | Canalis lateralis posterolateral | Posterolateral-most point at the centre of the lumen of the lateral semicircular canal |
| 14 | Canalis lateralis anterolateral | Anterolateral-most point at the centre of the lumen of the lateral semicircular canal |
| 15 | Canalis anterior ampulla | Centre of the ampulla of the anterior semicircular canal |
| 16 | Canalis anterior anterolateral | Anterolateral-most point at the centre of the lumen of the anterior semicircular canal |
| 17 | Canalis anterior superior | Superior-most point at the centre of the lumen of the anterior semicircular canal |
| 18 | Canalis anterior inferior | Inferior-most point of the vestibular wall lying in the anterior semicircular canal plane |
| 19 | Canalis posterior ampulla | Centre of the ampulla of the posterior semicircular canal |
| 20 | Canalis posterior inferior | Inferior-most point at the centre of the lumen of the posterior semicircular canal |
| 21 | Canalis posterior superior | Superior-most point at the centre of the lumen of the posterior semicircular canal |
| 22 | Canalis posterior posterolateral | Posterolateral-most point at the centre of the lumen of the posterior semicircular canal |