SPECIAL SENSES PART 2 Flashcards
Two types of deafness
Conduction deafness and sensorineural
A temporary or permanent deafness which is a disease of external and the middle ear
Conduction deafness
Degeneration or damage to receptor cells to cochlear nerve or neurons of auditory cortex due to old age extended listening to excessively loud sounds intake of ototoxic drugs
Sensorineural deafness
It is a test where base of vibrating tunic fork is applied to the forehead in the midline
Weber’s Test
3 types of Weber’s Test
Normal
Conduction
Sensorineural
_ - sound - midline
Normal
_ - sound louder in the affected ear
Conduction
_- sound louder in the normal ear
Sensorineural
It is a test where a base of tuning fork is place over the mastoid process of the skull
Rinne’s Test
Rinne’s Test
Normal - ____ > ______
Air conduction -> bone conduction
Rinne’s Test
Conduction deafness -> ____ -> _____
Bone Conduction -> air conduction
Rinne’s Test
Both are diminished but air conduction remains better than bone conduction
Sensorineural deafness
It maintains the body balance
Coordinates eye head and body movements and permits the eyes to remain fixed on a point in space as the head moves
Vestibular apparatus
For angular acceleration which is found in the dilitations of semicircular ducts called ampulla
Crista ampullaris
Contains gelatinous substance called cupula
Crista ampullaris