Quiz - 30 - Diving Knowledge Workbook - Diving Physiology

[Pedro Burrito]

From the Diving Physiology Section of the PADI Diving Knowledge Workbook Version 2.02 © PADI 2009:

Objective 2.12 - Define the term "vertigo" and explain the mechanism by which this normally occurs in the diver.

Question 2

Vertigo can be caused by:

a. ear squeeze

b. inner ear barotrauma

c. decompression sickness

d. All the above are correct​

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[Pedro Burrito]

Spoiler: Answer

d. All the above are correct

Various forms of ear squeeze can cause vertigo. Examples are: cold water entering the middle ear as a result of a ruptured ear drum; and a reverse block in one of the eustachian tubes allowing one ear to depressurize on ascent but not the other. As the sense of balance is controlled by the inner ear, damage to this organ usually results in some form of vertigo. Finally, in rare but severe cases, bubble formation from DCS can occur in the inner ear and result in vertigo.