Oral Cavity and Pharynx Flashcards
How many deciduous (primary) teeth do we have?
How many permanent (secondary) teeth?
20 deciduous
32 permanent
What are the tissue layers of the teeth?
- Enamel
- Dentine
- Pulp
What are the anatomical parts of the teeth?
- Crown
- Neck
- Root
What are the parts of the tongue?
- Root
- Body
- Apex
- Dorsum of tongue
The root of the tongue is attached to…
mandible and hyoid
Name five structures of the dorsum of tongue
- Sulcus terminalis (terminal sulcus)
- Circumvallate (vallate) papillae
- Filiform papillae
- Fungiform papillae
- Lingual tonsil
What is the function of intrinsic tongue muscles?
Alter the shape of the tongue
What is the function of extrinsic tongue muscles?
Alter the position of the tongue
What is the sensory innervation of the tongue?
Lingual nerve (V3) and glossopharyngeal
What provides taste innervation to the tongue?
Chorda tympani (VII) and glossopharyngeal
What is the motor innervation of the tongue muscles?
Hypoglossal except one is vagus
What are the extrinsic muscles of the tongue?
- Genioglossus
- Hyoglossus
- Styloglossus
- Palatoglossus
Which tongue muscles depress the tongue?
Genioglossus and hyoglossus
Which tongue muscle works with genioglossus to form a central trough during swallowing?
Styloglossus
Which tongue muscle most commonly acts to constrict the space between oral cavity and oropharynx?
Palatoglossus
What are the intrinsic muscles of the tongue?
- Superior longitudinal
- Inferior longitudinal
- Transverse
- Vertical
Which muscles shorten/retrude the tongue?
Superior and inferior longitudinal
Which tongue muscle curls the tongue longitudinally upward, elevating the apex and sides of the tongue?
Superior longitudinal
Which tongue muscle curls the tongue longitudinally downward, depressing the apex?
Inferior longitudinal
Which tongue muscle narrows and elongates (protrudes) the tongue?
Transverse
Which tongue muscle flattens and broadens the tongue?
Vertical
What structures make up the hard palate?
- Palatine process of maxilla
- Horizontal plate of palatine bone
What are fauces?
Space between oral cavity and pharynx
The uvula and root of tongue are part of which palate?
Soft palate
What are the soft palate muscles?
- Tensor veli palatini
- Levator veli palatini
- Palatoglossus
- Palatopharyngeus
- Musculus uvulae
What innervates tensor veli palatini?
Medial pterygoid nerve (branch of mandibular nerve CN V3) via otic ganglion
What innervates levator veli palatini?
Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus
What innervates palatoglossus?
Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus
What innervates palatopharyngeus?
Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus