Paranasal Sinuses Flashcards
What are the bony structures within the nose? Meatuses(Spaces)?
Bone=Superior, middle, and inferior nasal concha.
Spaces=
- Above superior concha=Sphenoethmoidal recess
- Below superior=Superior meatus
- Below middle=Middle meatus
- Below inferior=Inferior meatus.
What is the sensation and parasympathetic innervations of the nasal cavity?
Sensation: V1 and V2
Para=VII via greater petrosal
What are the lymphatics of nasal cavity?
Submandibular or retropharyngeal nodes.
What are nasal cavity gateways?
- Cribiform plate
- Sphenopalatine foramen
- Incisive canal
- Small lateral wall foramina
- Nares
What is the drainage, innervation, arterial supply, and lymphatics of frontal sinus?
D: Middle meatus
I: Supraorbital and supratrochlear of V1
A: Anterior ethmoid, Supraorbital and supratrochelar
L: Submandibular nodes
What is the drainage (anterior,posterior, middle), innervation, arterial supply, and lymphatics of ethmoid sinuses?
D: Posterior=superior meatus
Anterior/middle: middle meatus
I: Anterior/posterior ethmoid of V1
A: Anterior/post ethmoid a, Posterior lateral branches from sphenopalatine
L: Submandibular and retropharyngeal nodes.
What is the drainage, innervation, arterial supply, and lymphatics of sphenoid sinus?
D: Sphenoethmoid recess
I: Posterior ethmoid (V1)
A: Posterior ethmoid artery, Pharyngeal a
L: Retropharyngeal nodes
What are the superior, inferior, medial, lateral, and posterior relations of the maxilary sinus?
- Superior=Orbit, infraorbital n,a,v
- Inferior=Roots of molars and premolars
- Medial=Nasal cavity
- Lateral and anterior=Cheek
- Posterior=Infratemporal fossa, pterygopalatine fossa
What is the drainage, innervations, arteries, and lymphs of maxillary sinus?
D: Middle nasal meatus
I: AsA, MSA, PSA
A: Infraorbital, ASA, MSA, PSA
L: Submandibular nodes
What is sinusitis?
Sinus cavities inflamed.
What is the floor of the oral cavity?
- Mylohyoid
- Geniohyoid
- Tongue
What passes through the gateway into the floor of the oral cavity? Also called?
AKA 2nd pharyngeal aperture.
- Stylopharyngeus, hyoglossus, styloglossus m.
- Stylohyoid ligament
- Tonsillar a
- Lingual, glossopharyngeal and hypoglossal nn.
- Lymphatics
- Submandibular gland
What are the papillae of the tongue, locations, taste, keratinized, vascular?
- Filiform: Most numerous, no taste, keratinized (only one, avascular(Only one)
- Fugiform: Margins of tongue, taste, non K, has V
- Vallate or Circumvallate: Large line in V shape, taste, V, no K.
- Foliate: Sides of tongue, no Taste, no K, has V
what are the Extrinsic muscles of the tongue and their innervation?
- Genioglossus CN XII
- Hyoglossus CN XII
- Palatoglossus CNX
- Styloglossus CNXII
What is the Action and innervation of the Superior longitudinal tongue muscle?
A: Shortens and curls tongue up.
I: CN XII
What is the Action and innervation of the Inferior longitudinal tongue muscle?
A: Shortens and curls tongue down.
CN XII
What is the Action and innervation of the Transverse tongue muscle?
A: Narrows and elongates the tongue
I: CN XII
What is the Action and innervation of the Vertical tonguel muscle?
A: Flattens and widens the tongue.
CN XII
What is the venous drainage of the tongue? Eventually drains into?
Deep lingual and dorsal lingual.
All goes into Internal Jugular Vein
What are the lymphatics of the pharyngeal and oral parts of the tongue?
Phar=Drains through pharyngeal wall to jugulodigastric nodes.
Oral=Directly into deep cervical, or some thorugh submental and submandibular nodes.
some blood from the teeth can travel where and cause infection?
Through emissary vv. into the cavernous sinus.
What injection/nerve is the most difficult and why?
Inferior Alveolar (IA) because the mandibular bone is more dense and chemicals have harder time reaching.
