. 1. Trace the sequence of events from sound waves entering the auditory canal to action potentials traveling in the Vestibulocochlear nerve. Short phrases are OK. sound, naves are collected by the pinna Sound waver strike the eardrum, the air causes the eardrum to vibrate back and for • The vibration from malleus to the incus and then to the As the shapes vibrate, it causes vibration Membrane of aval window. is transmitted to malleuse 2. Fill in the table below with the Weber and Rinne findings for normal hearing, conduction deafness, or sensorineural deafness. Assume deafness occurs only in one ear and is complete, not partial. (You may have to dig for this information). Weber Test Rinne Test Normal Hearing Conduction Deafness Sensorineural Deafness 3. In vestibular nystagmus, why do the eyes move slowly in one direction? What causes the rapid return? 4. Is the vestibular apparatus stimulated at constant velocity? What significance does this have? 5. What is the cause of vertigo and motion sickness? Why do Dramamine or Scopolamine help with motion sickness?