Eponym Extravanganza Flashcards
Meckel’s Cave
CSF-containing dural pouch/recess in the posteromedial portion of the middle cranial fossa (between the prepontine cistern and the cavernous sinus)
houses the trigeminal ganglion and proximal rootlets of the trigeminal nerve
Foramen of Huschke
- The incomplete ossification of the anterior bony canal produces an opening into the infratemporal region
- serve as a means for extension of malignant tumors from the EAC to the deep lobe of the parotid gland.
Fissures of Santorini
Naturally occurring defects or vertical fissures in the anterior portion of the external auditory canal cartilage in the region of the bony-cartilaginous junction.
provide avenues of spread to the superficial lobe of the gland.
Bill’s Bar
vertical crest seen at the fundus of the porus acusticus in the the center of the posterior face is the petrous portion of the temporal bone
- also seen: falciform (horizontal) crest
Glaserian Fissure
Thepetrotympanic fissure, also known as theGlaserian(orglaserian)fissure,is a small fissure in thetemporal bonethat connects themandibular (glenoid) fossaand thetympanic cavity. It is a medial continuation of thetympanosquamosal suturethat runs between the superior borders of thetympanicandpetrous partsof the temporal bone.
Dorello’s Canal
channels the abducens nerve (CN VI) from the pontine cistern to the cavernous sinus and Inferior Petrosal Sinus
Dorello canal is found at the medial most end of the petrous ridge at the confluence of the inferior petrosal, basal, and cavernous sinuses
Boundaries
superiorly: petrosphenoidal ligament (Gruber ligament)
Inferiorly: bounded by a bony notch formed, from lateral to medial, by:
petrous ridge
petrosphenoidal suture
superolateral aspect of the clivus, immediately beneath the posterior clinoid
MacEwen’s triangle
- depressed cribriform area located posterior to the spine of Henle
- mastoid antrum located deep to this structure
MacEwen’s triangle
- depressed cribriform area located posterior to the spine of Henle
- mastoid antrum located deep to this structure
Jacobson Nerve
nerve passing through tympanic canaliculus as it penetrates keel containing sensory and preganglionic parasympathetic fibers from the inferior ganglion of the glossopharyngeal nerve into the middle ear
Arnold Nerve
The Arnold nerve originates from the superior ganglion of the vagus nerve and also has a small contribution from the inferior ganglion of the glossopharyngeal nerve. It ascends through the mastoid canaliculus (located lateral to the jugular fossa) in the mastoid portion of the temporal bone
Arnold nerve innervates the small parts of the external acoustic meatus and is the source of glomus jugulotympanicum paraganglioma from the non-chromaffin paraganglion cells, which are found along the nerve.
It is also responsible for the referred otalgia through the vagus nerve (CN X), in the case of laryngeal pathology.
Eagle Syndrome
Elongation or angulation of the styloid process (more than 3 cm) or calcified stylohyoid ligament can produce the triad of odynophagia, dysphagia, and foreign body sensation in the throat as a result of the compression of cranial nerves (mainly the glossopharyngeal, lower branch of trigeminal and the chorda tympani) or the internal carotid artery.
“Classic Eagle syndrome” is typically seen in patients after throat trauma or tonsillectomy. Symptoms include dull and persistent throat pain that may radiate to the ear and worsen with rotation of the head. Other symptoms may include difficulty swallowing, feeling of something stuck in the throat, tinnitus, and neck or facial pain.
A second form of Eagle syndrome unrelated to tonsillectomy causes compression of the vessel that carries blood to the brain, neck, and face (carotid artery). This form can cause headache and dizziness.
Prussak’s space
small middle ear recess
bordered
- laterally by the flaccid part of Shrapnell’s membrane,
- superiorly by the scutum and lateral malleal ligament,
- inferiorly by the lateral process of the malleus
Stenger test (use and methodology)
The test is based on Stenger principle. The principle states that, if a tone of two intensities (one greater than the other) is delivered to two ears of a person simultaneously, the ear which receives the tone of the higher intensity alone hears it.
When suspecting a malingering patient, this tuning fork test is performed by employing the use of 2 tuning forks (512 Hz), equidistantly placed in each ear and struck at the same time and the patient will report that 1 ear is louder (+ in a Malingering patient; provided all other examinations are normal) than the other. *
1 point
Alderman’s Nerve
another name for Arnold Nerve
known as the alderman’s nerve on the belief that stimulating the external auditory canal will stimulate gastric emptying; the aldermen who ate too much for lunch would wiggle their fingers in the external canal to relieve their epigastric discomfort.
pouch of Von Troeltsch or Tröltsch’s recesses
“Tröltsch’s recesses”, or singularly called the “anterior and posterior pouches of Tröltsch”, which are anatomical spaces between the malleolar folds and the tympanic membrane
The saccus anticus develops into the anterior pouch of von troltsch. The saccus medius develops into the attic. The saccus superius develops into the posterior pouch of von troltsch and the saccus posticus extends to pneumatize the area around the round and oval windows and the sinus tympani.
