Nasal Cavity

speech function

alter “quality” of exhaled speech stream so that it sounds nasal (m, n, ng)

biological functions

warm, filter, and humidify inhaled air and provide sense of smell

cartilage, vomer bone, ethmoid bone

the bilateral cavities of the nasal cavity are separated by the nasal septum, which consists of these 3 parts

inferior nasal concha, middle nasal concha, superior nasal concha

the nasal cavity’s lateral walls are comprised of these 3 parts

hard palate

function: ensures exhaled speech stream doesn’t leak between nasal and oral cavity (sound shaper)

comprised of: maxilla and palatine bone

maxilla

part of hard palate

has 2 landmarks: premaxilla and palatine process

palatine bone

part of hard palate

1 landmark: palatine process

cleft palate

results from lack of fusion between nasal septum, maxilla, and palatine bone

cleft lip

results from lack of fusion between premaxilla of maxilla and palatine process of maxilla