Jul 23, 2019 · The porus acusticus internus (plural: pori acustici interni), often merely referred to as porus acusticus, is the medial opening of the internal acoustic canal through which the facial nerve, vestibulocochlear nerve and labyrinthine artery pass 1.

The opening to the meatus is called the porus acusticus internus or internal acoustic opening. It is located inside the posterior cranial fossa of the skull, near the center of the posterior surface of the petrous part of the temporal bone.

Sep 23, 2024 · The internal acoustic canal (IAC), also known as the internal auditory canal or meatus (IAM), is a bony canal within the petrous portion of the temporal bone that transmits nerves and vessels from within the posterior cranial fossa to …

Aug 28, 2023 · The internal auditory canal begins in the temporal bone within the cranial cavity at an oval-shaped opening called the porus acusticus internus. The canal runs through the petrous segment of the temporal bone, which is located between the inner ear and posterior cranial fossa.

Positioned just under the subarcuate fossa –a slight depression above–and just above the jugular foramen. This opening gives way to a brief canal known as the internal acoustic meatus, which extends laterally.

Dec 29, 2015 · The internal auditory canal with its lateral “dead-end” fundus and medial internal auditory meatus, or porus acusticus, is roughly cylindrical in shape. There are variations between patients of the vertical height and transverse diameter, with the average height (from tomographic studies) measured at 4 mm (range 2 to 8 mm).

Temporal bone CT scans revealed bilateral broad-based hyperostotic lesions arising from the lateral aspect of the porus acusticus, resulting in narrowing of IAC with the right IAC measuring 0.8 mm in diameter and the left IAC measuring 2 mm in diameter ( Fig. 3).

porus acus´ticus exter´nus the outer end of the external acoustic meatus. porus acus´ticus inter´nus the opening of the internal acoustic meatus in the cranial cavity. porus op´ticus the opening in the sclera for passage of the optic nerve.

May 1, 2024 · The medial end of the canal is called porus acousticus and enters to the posterior cranial fossa [1]. The lateral end is called fundus which consistst of vertical cribriform osseous plate, where the inner ear and IAM are in contact.

porous acusticus (PA) and various landmarks have been described previously to delineate the orientation of the IAC. While hearing is at risk with translabyrinthine approaches, with the retrosigmoid approach a smaller operative area is available in …