Table 3.
The incidence of terminal division of the ILN according to anatomical classification.
| Type | Regions | Definition | Right | Left | Total |
|---|---|---|---|---|---|
| 1 | Arterial | Division occurs at or closely adjacent to neurovascular crossing. | 9 (47.4)* | 16 (45.7) | 25 (46.3) |
| 2 | Postarterial | Division occurs in the first (proximal) half of the distance between neurovascular crossing and laryngeal entry. | 7 (36.8) | 10 (28.6) | 17 (31.5) |
| 3 | Prelaryngeal | Division occurs in the second (distal) half of the distance between neurovascular crossing and laryngeal entry. | 2 (10.5) | 4 (11.4) | 6 (11.1) |
| 4 | Prearterial | Division occurs before (proximal to) neurovascular crossing. | 1 (5.3) | 5 (14.3) | 6 (11.1) |
|
| |||||
| 19 (100) | 35 (100) | 54 (100) | |||
*Numbers in parentheses are percentages.