Squamous Cell Carcinoma of the External Auditory Canal.
The external auditory meatus (EAM) in many species of mysticete whales is filled with a waxy ear plug. Though this lamellated structure is often used to age a whale, its formation and development remain undescribed. It is thought that growth layer groups (GLGs) are laid down annually, thereby increasing the size of this structure.
Describe the components of the external ear, middle ear and inner ear and relate these to their principal functions List the main distinctive features of the parts of the ear. Describe the principal features of the organs of balance.
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.
Unlike the external acoustic meatus, the internal acoustic meatus does not transmit sound. It instead transmits the facial and vestibulocochlear nerves and the internal auditory branch of the basilar artery.
External auditory canal Also called the “ear canal” auditory meatus: either of the passages in the outer ear from the auricle to the tympanic membrane. Tympanic membrane The tympanic membrane is a vital feature of the human ear, and is more commonly known as the eardrum.
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. Gross anatomy. The opening of the IAM, the porus acusticus internus, is located within the cranial cavity, near the.
External auditory meatus definition, the canal extending from the opening in the external ear to the tympanic membrane. See more.