Physiology Flashcards
(19 cards)
What does the thyroid gland produce?
Thyroid hormones (T3 and T4) Calcitonin
What is the function of the parathyroid glands?
Regulation of calcium and phosphate levels
What factor about the middle ear helps is to amplify sound?
Difference in area between the tympanic membrane and the stapes footplate
What makes tympanic membrane function optimal?
When middle ear pressure is the same as atmospheric pressure.
What equalises middle ear pressure with atmospheric pressure?
Swallowing and yawning - opens the eustachian tube.
What conditions can lead to energy loss from the tympanic membrane to oval window?
Otitis Media with Effusion
Tympanic membrane perforation/subtotal perforation
Eroded Incus
Otosclerosis
Which part of the ear pick up higher frequency sounds?
The outside of the ear
Which part of the ear pick up lower frequency sounds?
The inner of the ear
Where is the auditory cortex located?
Temporal lobe
What tests can be used to assess hearing and middle ear function?
Clinical testing Tuning fork tests Audiometry Tympanometry Objective testing
Which tuning fork test is a test of lateralisation?
Weber’s
Which tuning fork test is a test that compares loudness of perceived air conduction to bone conduction in one ear?
Rinne’s
In sensorineural hearing loss, which side will sound lateralise to in Weber’s?
The opposite ear of the hearing loss
In conductive hearing loss, which side will sound lateralise to in Weber’s?
The side of the hearing loss
In sensorineural hearing loss, will hearing be better in front of or behind the ear in Rinne’s test?
Hearing will be better in front of the ear
In conductive hearing loss, will hearing be better in front of or behind the ear in Rinne’s test?
Hearing will be better behind the ear
What types of audiometry tests are there?
Pure tone audiometry
Visual reinforcement audiometry
Play audiometry
Tympanometry
What is being measured in pure tone audiometry?
The quietest sound heard at each frequency
What is being measured in tympanometry?
Mobility of the eardrum - can detect fluid etc
