Oral Cavity Flashcards
what is the histological lining of the oral cavity, oropharynx and laryngoparyx
stratified squamous epithelium
usually not keratinised
where in the oral cavity is keratinised and why?
in the masticatory mucosa - hard palate, gingiva, dorsal of tongue (mucosa lining not keratinised)
to deal with friction and pressure
what gives general sensation to the superior half of the oral cavity?
CN V2
what gives general sensation to the inferior half of the oral cavity?
CN V3
where does jaw opening occur?
temperoomandibular joints
TMJs
what muscle pairs are involved in jaw ‘closing’?
masseter
temporalis
medial pterygoid
what muscle pair is involved in jaw ‘opening’?
lateral pterygoid
what supplies the jaw opening and closing muscles?
CN V3
where is the parotid gland?
near the second upper molar
what nerve supplies the parotid gland?
CN IX
where is the submandibular gland?
at the base of the frenulum
what nerve supplies the submandibular gland?
CN VII
where is the sublingual gland?
the floor of the mouthw
what nerve supplies the sublingual gland?
CN VII
what is the histology of the anterior 2/3 of the tongue?
stratified squamous epithelium
thin on ventral surface
thick with papillae on dorsal surface
how does the anterior 2/3 of the tongue sit?
horizontally and in the oral cavity
what nerve gives general sensation to the anterior 2/3 of the tongue?
CN V3
what nerve gives special sensation to the anterior 2/3 of the tongue?
CN VII
what is the histology of the posterior 1/3 of the tongue?
covered in smooth stratified epithelium
lacks papillae - except circumvulate papillae
substantial lymphoid aggregates in submucosa
how does the posterior 1/3 of the tongue sit?
vertically
not in oral cavity
what nerve gives general and special sensation to the posterior 1/3 of the tongue?
CN IX
what do the extrinsic muscles of the tongue do?
change the position of the tongue during mastication, swallowing and speech
what are the pairs of extrinsic tongue muscles?
palatoglossus
genioglossus
hypoglossus
styloglossus
what do skeletal intrinsic muscles of the tongue do?
modify the shape of the tongue during fucntion
