Sinus Sphenoidalis

Sinus Sphenoidalis. SummaryGross AnatomyArterial SupplyInnervationVariant AnatomyDevelopmentPractical Pointslocation the central body of the sphenoid bone anteroinferior to the sella turcicablood supply posterior ethmoidal and sphenopalatinearteriesinnervation posterior ethmoidal nerve and the orbital branch of the pterygopalatine ganglion The sphenoid sinuses are paired spaces formed within the body of the sphenoid bone communicating with the roof of the nasal cavity via the sphenoethmoidal recess in its anterior wall The two hemisinuses are separated by a septum which may or may not be in the midline It usually lies anteroinferior to the sella A large sinus can show a number of ridges and depressions related to closely adjacent structures These can include the pituitary gland optic nerve and internal carotid artery 1 superiorly cavernous sinus sella turcica and its contents 2 inferiorly nasal cavities 3 anteriorly nasal cavities posterior ethmoid air cells 4 posteriorly contents of the middle cranial fossa 5 laterally cavernous sinus cranial cavity Pneumatization types have been subdivided 4 1 conchal 2 lateral recess 3 presellar 4 sellar (which can be incomplete or complete) nasal branches of the sphenopalatine artery parasympathetic orbital branches of the pterygopalatine ganglionsensory posterior ethmoidal nerve from the nasociliary nerve a branch of the ophthalmic division of the trigeminal nerve With respect to optic nerve(CN II) relationship 1 type 1 adjacent to sphenoid sinus 2 type 2 indenting the sinus 3 type 3 traversing the sinus 4 type 4 adjacent to posterior ethmoid sinus Pneumatization of the sphenoid sinus starts at around 2 years of age and it develops more slowly than the other paranasal sinuses It is important to look for and report the type of pneumatization of this sinus and to report its relationship with adjacent neurovascular structures especially the presence of dehiscence.

Clinical significance A potential complication of sphenoidal sinusitis is cavernous sinus thrombosis If a fastgrowing tumor erodes the floor of the sinus the vidian nerve could be in danger Latin sinus sphenoidalisNerve and orbital branches of the MeSH TA98 .

Sphenoid sinus Radiology Reference Article Radiopaedia.org

Here are some of the typical sphenoidal sinusitis symptoms Mucus discharge – post nasal drip and sore throat Headache – pain on top of head and around temples Neck pain – sometimes including ear pain as well Weakened sense of smell – due to mucus buildup Pressure and pain around eyes – often.

Sphenoid sinus Wikipedia

Sinus Sphenoidalis Each sinus opens into the roof of the nasal cavity through apertures on the posterior wall of the sphenoethmoidal recess directly above the choana The choana receives the opening of the sphenoidal sinus The choana is part of a system that moves mucus that has been collected by the sinuses which are mucosalined airspaces within the bones of the face and skull.