| Landmark No. | Definition |
| 1 | Most inferior point on the lateral border of the articular eminence |
| 2 | Most posterior point within the temporal fossa |
| 3 | Junction of the squamotympanic fissure & sphenosqamous suture |
| 4 | Most inferior point of post-glenoid process |
| 5 | Most superior point on the lateral border of the glenoid fossa |
| 6 | Most superior point within the glenoid fossa |