C07 - The Ear, Hearing and Balance Flashcards
Define Hearing?
The process of translating air pressure waves into electrical signals for the brain to interpret.
Connects the Middle Ear to the Cavity at the back of the Nose. What am I?
Eustachian Tube.
What is the purpose of the Eustachian Tube?
Helps to equalise Air Pressure in the Middle Ear.
Define the Vestibular System?
Assists with maintaining Balance and Spatial Awareness.
Which position is the Utricle found in the Vestibular System?
Orientated horizontally.
Which position is the Saccule found in the Vestibular System?
Orientated vertically.
Both Utricle and Saccule contain what hair-like sensor?
Otoliths.
Semi-circular Canals detect which type of acceleration?
Angular.
Utricle and Saccule detect which type of acceleration?
Linear.
The Auditory Canal leads to the ear drum which separates what?
The Outer Ear from the Middle Ear.
What is the range frequency a human can hear?
20 to 20,000 Hertz.
What is 1 Hertz?
One vibration per second.
True or False. Exposure to high levels of sound can cause hearing loss?
True.
What does NIHL stand for?
Noise Induced Hearing Loss.
What is the acceptable figure of NIHL?
90 dB.
Any defect of the Middle of Outer Ear which prevents sound from being transmitted to the Inner Ear is known as?
Conductive Deafness.
Define Presbycusis?
Age related hearing loss.
Define Tinnitus?
Continually hearing sounds and noises.
Define Motion Sickness?
A mismatch between movements the brain detects visually and through the Vestibular System.
The most common cause of mismatch is ‘____’ which are detected by the ‘____’ but not the ‘____’ (3)?
- Accelerations.
- Vestibular System.
- Visual System.
True or False. Motion Sickness can also be triggered by Vibrations?
True.
What is the best treatment for Motion Sickness?
Using external cues to fix the mismatch, such as looking at the horizon.