questions 0

Inner Ear

Author:
Topic updated on 09/10/16 12:08pm

Overview
  • Structure and function
    • utricle and saccule 
      • point of detection is the maculae in conjunction with the hair cells
      • measures linear acceleration
    • semicircular canals
      • points of detection are the ampullae in conjunction with the hair cells
      • measures angular accelaration
    • Organ of Corti
      • point of detection is the tectorial membrane in conjunction with the hair cells
      • measures sound waves
  • Pathology
    • deafness tests
      • Rinne test
        • procedure
          • tuning fork placed on the mastoid process
          • normal: air (AC) > bone conduction (BC)
      • Weber test
        • procedure
          • tuning fork placed in the middle of the forehead
          • normal: sound should be of equal intensity in both ears
    • conduction deafness
      • Rinne: BC > AC (in damaged ear)
      • Weber: lateralization to damaged ear
    • sensorineural deafness
      • Rinne: AC > BC (in damaged ear)
      • Weber lateralizes to healthy ear
    • presbycusis
      • hearing loss with old age
      • high frequency lost first followed by low frequency
  • Treatment
    • cochlear implants
      • bypasses the peripheral auditory system and converts sound to electrical signals received by the cochlea

 

 



  RATE CONTENT
5.0
AVERAGE 5.0 of 1 RATINGS

Qbank (0 Questions)


Recent Videos

video
great
10/8/2015
53 views
0
video
great
10/8/2015
58 views
0
video
good
10/8/2015
44 views
0

Evidence & References Show References




Topic Comments

Subscribe status: