Left temporal bone. Outer surface. (Petrotympanic fissure is labeled at left, fourth from top.)
The right membrana tympani with the malleus and the chorda tympani, viewed from within, from behind, and from above. (Glaserian fissure labeled at center left.)
Details
Identifiers
Latin
fissura petrotympanica
TA98
A02.1.06.074
TA2
717
FMA
55463
Anatomical terms of bone
[edit on Wikidata]
The petrotympanic fissure (also known as the squamotympanic fissure or the glaserian fissure) is a fissure in the temporal bone[1] that runs from the temporomandibular joint to the tympanic cavity.[2]
The mandibular fossa is bounded, in front, by the articular tubercle; behind, by the tympanic part of the bone, which separates it from the external acoustic meatus; it is divided into two parts by a narrow slit, the petrotympanic fissure.
It opens just above and in front of the ring of bone into which the tympanic membrane is inserted; in this situation it is a mere slit about 2 mm. in length. It lodges the anterior process and anterior ligament of the malleus, and gives passage to the anterior tympanic branch of the internal maxillary artery.
^Petrotympanic+fissure Archived October 9, 2016, at the Wayback Machine at eMedicine Dictionary
^Eckerdal O (1991). "The petrotympanic fissure: a link connecting the tympanic cavity and the temporomandibular joint". Cranio. 9 (1): 15–22. doi:10.1080/08869634.1991.11678343. PMID 1843474.
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The petrotympanicfissure (also known as the squamotympanic fissure or the glaserian fissure) is a fissure in the temporal bone that runs from the temporomandibular...
which are three small apertures: the "iter chordæ posterius", the petrotympanicfissure, and the "iter chordæ anterius". The iter chordæ posterius (apertura...
mandibular part of) the maxillary artery. It passes through the petrotympanicfissure to entre the middle ear where it contributes to the formation of...
wall of the tympanic cavity close to the petrotympanicfissure. Some of the fibers also pass through the fissure to the spine of sphenoid bone. The lateral...
the fetal disk. The disk also continues posteriorly through the petrotympanicfissure and attaches to the malleus of the middle ear. A growth center is...
facial canal to chorda tympani, through middle ear cavity, out petrotympanicfissure to join the lingual nerve, travels with lingual nerve to synapse...
the chorda tympani nerve. This nerve exits the skull through the petrotympanicfissure and merges with the lingual nerve, after which it synapses with...
meatus; it is divided into two parts by a narrow slit, the petrotympanicfissure (Glaserian fissure). The anterior part, formed by the squamous part, is smooth...
lingual nerve to enter the tympanic cavity (middle ear) via the petrotympanicfissure. It joins the rest of the facial nerve via the canaliculus for chorda...
tympanomastoid fissure. Its upper border fuses laterally with the back of the postglenoid process, while medially it bounds the petrotympanicfissure. The medial...
fossa is divided into two parts by a narrow slit, the petrotympanicfissure (Glaserian fissure). It is concave in shape to receive the condyloid process...
persistent venous sinus reflects an arrest in embryologic development. Petrotympanicfissure "The Petrosquamosal Sinus: CT and MR Findings of a Rare Emissary...
canaliculus of chorda tympani": A canal at the medial end of the petrotympanicfissure, through which the chorda tympani nerve exits the tympanic cavity...
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