What is fundus of internal acoustic meatus?

Internal acoustic meatus (IAM) is a canal which is terminated with a fundus located inside the pyramid of the temporal bone. This plate separates the cochlea and vestibule from the IAM, and is defined as a fundus of the internal acoustic meatus (FIAM).

What is the fundus of the IAC?

The fundus separates the internal auditory canal from the cochlea and vestibule which are located in close proximity. [2] It is divided into superior and inferior segments by the transverse crest (also called the falciform crest).

What is the function of the internal acoustic meatus?

The internal auditory meatus provides a passage through which the vestibulocochlear nerve (CN VIII), the facial nerve (CN VII), and the labyrinthine artery (an internal auditory branch of the anterior inferior cerebellar artery in 85% of people) can pass from inside the skull to structures of the inner ear and face.

Where is the acoustic meatus located?

temporal bone
The internal auditory canal (IAC), also referred to as the internal acoustic meatus lies in the temporal bone and exists between the inner ear and posterior cranial fossa.

What does auditory meatus mean?

Definitions of auditory meatus. either of the passages in the outer ear from the auricle to the tympanic membrane. synonyms: acoustic meatus, auditory canal, ear canal, external auditory canal. type of: meatus. a natural body passageway.

What is a auditory meatus?

external auditory canal, also called external auditory meatus, or external acoustic meatus, passageway that leads from the outside of the head to the tympanic membrane, or eardrum membrane, of each ear. The canal is nearly 1 inch (2.5 cm) in length and is lined with skin that extends to cover the tympanic membrane.

What is the meaning of acoustic meatus?

Noun. 1. acoustic meatus – either of the passages in the outer ear from the auricle to the tympanic membrane. auditory canal, auditory meatus, ear canal, external auditory canal.

What is the purpose of the internal acoustic meatus quizlet?

The external acoustic meatus is the opening in the temporal bone that allows sound waves to reach the tympanic membrane. The internal acoustic meatus is the foramen in the temporal bone that allows the vestibulocochlear nerve and the facial nerve to pass into the skull at the base of the brain.

What is a internal auditory meatus mean?

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 the auditory and vestibular apparatus.

What is acoustic nerve?

The cochlear nerve, also known as the acoustic nerve, is the sensory nerve that transfers auditory information from the cochlea (auditory area of the inner ear) to the brain. It is one of the many pieces that make up the auditory system, which enables effective hearing.