Across

1

External sound-gathering portion of ear, consist of pinna & ear canal. (5,3)

2

Air-filled chamber containing the middle bones or ossicles. The middle ear conveys & amplifies vibration from the tympanic membrane to the oval window. (6,3)

4

The first ossicle; the malleus receives vibration from the tympanic membrane & is attached to the incus. (7)

7

The middle ossicle; the connection between malleus & stapes. (5)

9

First brain stem nucleus where afferent auditory nerve fibers synapse. (8,7)

12

Three tiny bones of the middle ear (8)

14

The canal that conducts sound vibrations from the pinna to the tympanic membrane & prevents damage to the tympanic membrane. (3,5)

17

Reflex that protects the ear from intense sounds, via contraction of the stapedius & tensor tympani muscles. (8,6)

19

(_______) or nerve damage to middle ear is referred to ENT specialist (4)

21

Hairlike extensions on tips of hair cells that initiate the release of neurotransmitters when they are flexed. (11)

22

Region of cortex lateral & adjacent to the belt area where neurons respond to more complex characteristics of sounds, as well as to input from other senses. (8,4)

25

Infection of the ear canal that causes it to swell (6,7)

26

A midbrain nucleus in the auditory pathway. (8,10)

27

Fluid-filled passage that extends from the round window at the base of the cochlea to the helicotrema at the apex. (8,5)

Down

1

Inflammation of middle ear, mostly in child as result of infection. (6,5)

3

Neuron that carries information from the central nervous system to the periphery. (8,5)

5

Tumor in the auditory nerve. Usually associated with ringing in the ears. (8,7)

6

Muscle attached to the stapes in the cochlea; tensing the stapedius decreases vibration. (9)

8

Outer, funnel-like part of the ear. (6)

10

Cells that support the stereocilia that transduce mechanical movement into neural activity sent to the brain stem; hair cells also receive inputs from the brain. (4,5)

11

Third ossicle; connected to the incus on one end, the stapes presses against the oval window of the cochlea on the other end. (6)

13

Thin sheath of tissue separating the vestibular & middle canals. (8,1,8)

15

Neuron that carries sensory information to the central nervous system. (8,5)

16

Used when hearing loss is severe, it compensates for damaged or nonworking parts of the inner ear (8,8)

18

Hollow cavity in the temporal bone of the skull & the structures w/in this cavity (5,3)

20

amplifies sound; does not restore hearing (7,3)

23

Spiral structure of the inner ear containing the organ of Corti. (7)

24

(___ ___) infections are usually be treated with eardrops (3,5)