Lab 27 Ear Flashcards
Outer rim of the auricle
Helix
Inner ridge of the auricle
Antihelix
Deepest surface inside the antihelix of the auricle
Concha
Tab anterior to external meatus of the auricle
Tragus
Tab opposite tragus, usually the inferior end of the antihelix of the auricle
Antitragus
Ear lobe of auricle
Lobule
A majority of the cartilaginous portion of the ____ should be with the dismembered ear.
External auditory canal or external acoustic meatus
The thinner bone, _______, is over the middle ear cavity where the _____ is identifiable. The _____ is found anterior to the thicker, mounded ____ ______.
Tegmen, malleus, tegmen, arcuate eminence
What groove is angling posterolateral from the foramen lacerum? Which cranial fossa is this in?
The groove for the greater petrosal nerve in the middle cranial fossa
What 2 nerves are found in the internal acoustic meatus?
Facial nerve (CN VII) and vestibulocochlear nerve (CN VIII)
The tegmen tympani forms the ___ of the middle ear cavity and will be found just ____ to the intersection point o the facial nerve and vestibulocochlear nerve.
Roof, lateral
We will follow the facial nerve laterally to the ______ _____ where the ____ _____ nerve can be found originating.
Geniculate ganglion, greater petrosal nerve.
In the angle formed by the greater petrosal nerve, the ganglion, and the facial nerve, you should find the _____ situation a smidge more anterior than the internal acoustic meatus.
Cochlea
Posterior to the geniculate ganglion, you will find a _______ ______.
Semicircular canal
What is more anterior, the malleus or the incus?
The malleus is more anterior
The ___ ____ is found passing between the _____ and the handle of the ____ from posterior to anterior.
Chords tympani
Incus and the handle of the malleus
What is a thin strand spanning from the medial wall to the handle of the malleus?
Tendon of the tensor tympani
What are the creatures of the medial wall of the middle ear cavity?
Promontory, stapes, round window, tensor tympani
What is a small bulge in the middle ear cavity?
Promontory
What is attached to oval window and is superoposterior to the promontory in the middle ear cavity?
Stapes
What is inferoposterior to promontory in the middle ear cavity?
Round window
What is anterior to the stapes in the middle ear cavity?
Tensor tympani muscle
What is the opening through the posterior wall into the mastoid air cells?
Aditus
