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Otology - Coggle Diagram

- - - - Associated with jervell lange lielson and usher
    - - Cochleosaccular dysplasia (Sheibe): most common histopathologic aplsia - limited membranous cochleosaccular dysaplsia (pars Inferioris) - normal labyrinth
        
        associated with Jervell lange nielsen, Refsum, usher, waardenburg, TS 18 , rubella
      - Cochlear basal turn dysplasia (alexander): partial aplasia of cochlear duct at basal turn - patients ave high frequency HL - able to amplify the lower frequencies In these patients
  - - - Cochlear aplasia: 5th week - rare, zero hearing , arrest In cochlear bud formation - still possible to Implant kids Into the vestibule If audiological response Is demonstrated before surgery
      - Cochlear hyoplasia: 6th week - cochlear has single turn or less 15% of cochlear deformities variable hearing depending on membranous Involvement
      - Incomplete partition: Mondini - Incomplete bony and membranous labyrinth - cochlea may be present as a curved tube.
        
        IP1 - lacks entire modiolus and Interscalar septa, cystic cochleovestibular malformation
        
        IP 2 - mondini malformation, normal base turn but cystic apex, 1.5 turns, + Enlarged VA - 7th week arrest. Most common - lack of Interscalar septum. Variable hearing , organ of corti development and neural development Is variable
        
        Associated with: Klippel Feil, Waardenburg, TC, Branchiootorenal, pendred, mobius (wild wars teach brothers patience)
        
        IP 3 - x - linked deafness, deficient modiolus, partial Interscalar septations at the cochlear periphery
      - Common cavity: cock deformity - 4th week or aberrant later week - cochlea and vestibular are confluent without Internal architecture - 20%
- - - - Spont and gaze nystagmus
      - Static position testing
      - Dynamic position testing (DH)
      - Caloric testing
      - Saccade testing
      - Smooth pursuit testing
      - optokinetic testing
      - calibration
      - fistula test
      - fixation suppression
  - - - Spontaneous
      - Evoked
        
        Transiet
        
        Distortion
        
        Stimulus frequency
    - - Endocochlear potential
      - Stimulated potentials
      - Summating potential
    - - Auditory brainstem response (ABR)
      - Auditory steady state response (ASSR)
      - Cortical evoked potentials
- - - - Posterior
      - Horizontal
      - Superior
    - - Crisis of tumarkin
      - Lermoyez attack
      - Cochlear hydrops
      - Vestibular hydrops
      - Delayed hydrolymphatic hydrops
  - - - Migraine, BPV of childhood, tension, vertebrobasilar Insufficiency
    - - Lateral medullary Infarction (wallenberg syndrome, PICA)
      - Lateral pontomedullary syndrome (AICA)
      - Subclavian steal