Terminology
Terminology
Terminology
Middle Ear
Inner Ear
100
The prominence referred to as the ear; collector of sound to be processed at deeper levels
What is the pinna?
100
a round opening between the middle ear and the cochlea that is closed over by a membrane—called alsofenestra cochleae, fenestra rotunda
What is the round window?
100
the cavity in the petrous portion of the temporal bone that contains the membranous labyrinth of the inner ear and is divided into the vestibule, cochlea, and semicircular canals—called also bony labyrinth
What is osseous labyrinth?
100
This muscle of the middle ear is innervated by the CN VII facial nerve.
What is the stapedius
100
This membrane separates the scala vestibuli and scala media.
What is Reissner's membrane?
200
the entrance to the ear canal; 7 mm in diameter; 2.5 cm long; S-shaped; resonating cavity
What is the External Auditory Meatus?
200
an oval opening between the middle ear and the vestibule having the base of the stapes or columella attached to its membrane—called also fenestra ovalis, fenestra vestibuli
What is the oval window?
200
The inner row of hair cells of the cochlea, numbering approximately 3500, maintaining the primary role of auditory signal transduction
What is the inner hair cell?
200
This muscle of the middle ear is innervated by the CN V trigeminal nerve.
What is the Tensor tympani?
200
This membrane separates the scala tympani and scala media.
What is Basilar membrane?
300
Ear drum; marks the boundary between the outer and middle ear; thin three-layered sheet of tissue; 55mm2 in area; important landmarks are umbo, cone of light, handle of the malleus
What is the tympanic membrane?
300
the lymph-filled spirally arranged canal in the bony canal of the cochlea that is separated from the scala media below by the vestibular membrane, is connected with the oval window, and receives vibrations from the stapes
What is the scala vestibuli?
300
the system of membrane-lined interconnected sacs and passages that is suspended within the bony labyrinth of the inner ear, is filled with endolymph and surrounded by perilymph, and includes the scala media, utricle, saccule, and semicircular ducts
What is membranous labyrinth?
300
stapedius and tensor tympani
What are the smallest muscles of the body?
300
This CN innervates the hair cells.
What is VIII vestibulocochlear nerve?
400
Bones of the ear; malleus, incus, stapes
What is the ossicles?
400
Outer three rows of hair cells of the organ of Corti, numbering approximatley 12000
What is the outer hair cells?
400
a complex epithelial structure in the cochlea that in mammals is the chief part of the ear by which sound is directly perceived and that rests on the internal surface of the basilar membrane and contains two spiral rows of rods of Corti which arch over a spiral tunnel of Corti and support on the inner side a single row of columnar hair cells and on the outer side several rows having their bases surrounded by nerve-cell arborizations
What is the Organ of Corti
400
malleus, incus, stapes
What are the bones of the middle ear from distal to medial?
400
This branch of the CN VIII receives information from the semi-circular canals.
What is the vestibular branch?
500
Anaylsis of an acoustical signal to determine the relative contribution of individual frequency components
What is spectral analysis?
500
Frequency of stimulation to which a resonant system responds most vigorously
What is resonant frequency?
500
the spirally arranged canal in the bony canal of the cochlea that contains the organ of Corti, is triangular in cross section, and is bounded by the vestibular membrane above, by the periosteum-lined wall of the cochlea laterally, and by the basilar membrane below
What is scala media?
500
It isolates the tympanic membrane and middle ear from external objects; the cerumen of the EAM catches foreign matter.
What physical protection does the EAM provide?
500
This is the first site of binaural interaction, receiving information from the cochlear nuclei of both ears, and is specialization for localization of sound in space.
What is the Superior Olivary Complex?
M
e
n
u