Table 1.
Limit |
Anatomical |
Technical |
Superior | Hard and soft palate | The line passing from the palatal plane (ANS to PNS) extending to the posterior wall of the pharynxa |
Inferior | Vallecula (plane of hyoid bone; base of the epiglottis) | Line passing from the antero-superior edge of C4 to menton |
Anterior | Circumvallate papillae and the oropharyngeal isthmus | Line passing from the soft palate to menton |
Posterior | Respective pharyngeal walls | Posterior wall of the pharynx |
Lateral | Respective pharyngeal walls | Respective pharyngeal walls |
ANS indicates anterior nasal spine; PNS, posterior nasal spine.