X hits on this document

55 views

0 shares

0 downloads

0 comments

21 / 26

hiatus semilunaris

curved slit

sharp inferior edge

rounded, superior edge: ethmoidal bulla—elevation of ethmoidal labyrinth

contains ostium for maxillary sinus

infundibulum: narrow passage anterosuperior to hiatus semilunaris

frontonasal duct travels from frontal sinus to upper portion of infundibulum

o

ethmoidal cells: lateral to middle and superior conchae

anterior, middle and posterior (under superior concha)

o

ostiums: openings  (sphenoidal sinus, maxillary sinus)

o

maxillary sinus

three-sided hollow pyramid

15 mL capacity

superior wall separates sinus from orbital cavity

ridge on orbital and anterior surfaces: infraorbital canal

infraorbital nerve and accompanying vessels

floor: roots of teeth

covered by mucoperiosteum

infectioncan spread into sinus

membrane of sinus may be tornfistula b/w mouth and sinus

o

air from oral cavity escapes into sinus

o

sphenopalatine foramen and pterygopalatine fossa

o

sphenopalatine artery

one of the terminal branches of maxillary artery

branches into posterior septal branch and posterior lateral nasal branch

nasal artery: on perpendicular plate of palatine bone

passes thru sphenopalatine foramen

o

greater palatine foramengreater palatine canallateral to sphenopaltaine foramen

o

greater palatine canal

greater palatine nerve, greater palatine artery (branch of maxillary)

o

pterygopalatine (sphenopalatine) ganglion: greater palatine nerve, infraorbital nerve branch from here

o

nerve of pterygoid canal (Vidian nerve)

goes to pterygopalatine ganglion

consists of preganglionic parasympathetic fibers from greater petrosal nerve and postganglionic sympathetic fibers from deep petrosal nerve

o

pterygopalatine fossa

maxillary arterygreater palatine artery + sphenopalatine artery

maxillary nerve: from foramen rotundum to inferior orbital fissure

pterygopalatine ganglion: attached to maxillary nerve

Palate, Tonsil and Pharyngeal wall

o

hard palate and soft palate

o

hard palate: anterior 2/3 of palate

o

soft palate: posterior 1/3 of palate

thickness: due to glands

strength: aponeurosis in anterior 1/3

mobility: muscles in posterior 2/3

o

small mucus glands abundant over palate

o

greater palatine nerve and vesselsgreater palatine foramen in hard palate

goes anteriorly to mucosa of hard palate

o

lesser palatine nerve: posteriorly to soft palate

o

palatine tonsils

o

superior 1/3 of tonsils extend into soft palate

Document info
Document views55
Page views55
Page last viewedMon Dec 05 01:31:54 UTC 2016
Pages26
Paragraphs2571
Words8835

Comments