Hearing and EquilibriumName:

Instructor:

Date:

1. Ear General: Using the provide word list, label the letteredstructures.

Auricle (pinna) Middle Ear Inner Ear

Incus Stapes Semicircular Canals

Cochlea Malleus Tympanic membraneExternal auditory canal

Auditory (Eustachian) tube

A) _____________________ G)

B) _____________________ H)

C) _____________________ I)

D) _____________________ J)

E) _____________________ K)

F) _____________________

2. Ear (middle ear): Using the provide word list, label thelettered structures.

Temporal bone Malleus IncusTensor tympani muscle

Stapedius muscle Stapes

Round window Auditory tube

A) _____________________ E)

B) _____________________ F)

C) _____________________ G)

D) _____________________ H)

3. Ear (middle ear): Using the provide word list, label the letteredstructures.

Anterior Posterior LateralVestibule Ampullae (crista) SacculeEndolymphatic sac Cochlea Organ of Corti Cochlear duct Vestibular duct Tympanic ductMaculae Utricle

A) _____________________ H)

B) _____________________ I)

C) _____________________ J)

D) _____________________ K)

E) _____________________ L)

F) _____________________ M)

G) _____________________ N)

4. Ear (Spiral Organ): Using the provide word list, label the letteredstructures. Terms may be repeated.

Cochlear nerve Inner hair cell Tectorial membraneOuter hair cell Supporting cell Basilar membraneSpiral ganglion Vestibular membrane Scala vestibuleScala tympani Organ of Corti (spiral organ) Cochlear duct Hairs

A) _____________________ H)

B) _____________________ I)

C) _____________________ J)

D) _____________________ K)

E) _____________________ L)

F) _____________________ M)

G) _____________________ N)

O)

5. Ear (Neural Pathway): Using the provide word list, label thelettered structures. Terms may be repeated.

Vestibular ganglion Red nucleus Cerebellum Vestibulospinal tract Vestibular nucleus To superior colliculus

NervesVestibular Cochlear Vestibulocochlear OculomotorTrochlear nerve Abducens Accessory

A) _____________________ H)

B) _____________________ I)

C) _____________________ J)

D) _____________________ K)

E) _____________________ L)

F) _____________________ M)

G) _____________________

6. With reference to this topic, state a brief function for theseterms:

Cerebellum Cochlear nerve Vestibulospinal tractOrgan of Corti (spiral organ)

Stapedius muscle Round window

Semicircular Canals

Auditory (Eustachian) tube

Tensor tympani m.

Tympanic membrane

Ext. Auditory canal

7. Describe the relationship between sound frequencies and thehair cells located in the cochlea.

8. Describe the role of the auricle in sound direction and collection.

9. Explain the role of otoliths in the perception of static equilibriumbased on head position.

10. Explain the role of endolymph (semicircular canals) as itrelates to the perception and activation of receptors duringangular acceleration.

11. State the differences between conductive and sensorineuraldeafness.

12. Explain the importance of the Rinne test.

13. During the Balance Test, several sensory receptors played arole. Name 3 sensory receptors. Hint: Was your balance betterwith the eyes open or closed? Why?

14. State and explain the difference between static and dynamicequilibrium.

15. Describe a step-by-step pathway of how sound enters the earand is transmitted to the spinal cord.