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SPRING 13 Disorders of Hearing > FINAL - Central/Neural Disorders > Flashcards

FINAL - Central/Neural Disorders Flashcards

1
Q

Acoustic Neuroma

Define

Unilateral or Bilateral?

A

Also called Vestibular Schwannoma

Benign tumor

Unilateral

*Schwann Cells- surround the Vestibular branch of 8th cranial nerve

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2
Q

Bilateral Schwannomas

A

NF2 Neurofibromatosis

account for 5% of acoustic tumors

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3
Q

Initial complaints of Acoustic Neuromas

A

Progressive HL

Tinnitus

Dizziness

Facial weakness*

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4
Q

Acoustic Neuroma Audiometry

Unilateral

Conductive or SNHL

Speech Discrimination

Acoustic Reflexes

A

Unilateral asymmetric

SNHL (high frequency)

Degree of loss not correlated to tumor size

Poorer speech discrimination + PB Rollover

Abnormal reflexes

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5
Q

ABR Abnormalities

A

If Wave V present- delayed wave V latency on tumor size

Interaural Wave V latency difference

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6
Q

Acoustic Neuroma Treatment

A

Surgical- Ability to preserve hearing/blood supply to cochlea & 8th nerve depends on size of tumor

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7
Q

Auditory Neuropathy

Define

Characteristics

Cause?

Age?

A

Condition in which normal cochlea OHC function but abnormal neural function starting with 8th nerve

  • Idiopathic, Genetic
  • Age- Infancy/Childhood
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8
Q

Auditory Neuropathy Treatment

A

Need to improve signal to noise ratio

amplification

FM system

Cochlear Implant

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9
Q

Auditory Neuropathy Audiometry

Thresholds?

OAEs, Acoustic Refleces- Absent or Present

WR?

A
  • Variable thresholds (normal-profound)
  • Auditory brainstem response is absent/normal
  • Cochlear Micophonic: present
  • OAEs present
  • WR poor
  • Acoustic Reflexes absent
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10
Q

Nonorganic (Functional) HL

define

A

Apparent loss without sufficient pathological evidence to explain

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11
Q

Define Malingering

A

Deliberate falsifcation of physical or psychological symptoms for special gain

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12
Q

Define Pseudohypacusis

A

False hearing loss

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13
Q

Stenger Test

A

Used for bilateral/asymmetric ( > 20 dB)

two tones of same frequency are introduced simultaneously to both ears. Only louder one will be perceived.

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14
Q

Positive Stenger

A

Failed to respond

indicates they actually hear it in their poor ear

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15
Q

Negative Stenger

A

Respond

suggests absense of nonorganic loss

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16
Q

Audiological Tests to Consider for Nonorganic HL

A
  • OAEs
  • ABRs
  • Pure tone thresholds but use ascending method
17
Q

Also called Vestibular Schwannoma

Benign tumor

Unilateral

*Schwann Cells- surround the Vestibular branch of 8th cranial nerve

A

Acoustic Neuroma

Define

Unilateral or Bilateral?

18
Q

NF2 Neurofibromatosis

account for 5% of acoustic tumors

A

Bilateral Schwannomas

19
Q

Progressive HL

Tinnitus

Dizziness

Facial weakness*

A

Initial complaints of Acoustic Neuromas

20
Q

Unilateral asymmetric

SNHL (high frequency)

Degree of loss not correlated to tumor size

Poorer speech discrimination + PB Rollover

Abnormal reflexes

A

Acoustic Neuroma Audiometry

Unilateral

Conductive or SNHL

Speech Discrimination

Acoustic Reflexes

21
Q

If Wave V present- delayed wave V latency on tumor size

Interaural Wave V latency difference

A

ABR Abnormalities

22
Q

Surgical- Ability to preserve hearing/blood supply to cochlea & 8th nerve depends on size of tumor

A

Acoustic Neuroma Treatment

23
Q

Condition in which normal cochlea OHC function but abnormal neural function starting with 8th nerve

  • Idiopathic, Genetic
  • Age- Infancy/Childhood
A

Auditory Neuropathy

Define

Characteristics

Cause?

Age?

24
Q

Need to improve signal to noise ratio

amplification

FM system

Cochlear Implant

A

Auditory Neuropathy Treatment

25
Q
  • Variable thresholds (normal-profound)
  • Auditory brainstem response is absent/normal
  • Cochlear Micophonic: present
  • OAEs present
  • WR poor
  • Acoustic Reflexes absent
A

Auditory Neuropathy Audiometry

Thresholds?

OAEs, Acoustic Refleces- Absent or Present

WR?

26
Q

Apparent loss without sufficient pathological evidence to explain

A

Nonorganic (Functional) HL

define

27
Q

Deliberate falsifcation of physical or psychological symptoms for special gain

A

Define Malingering

28
Q

False hearing loss

A

Define Pseudohypacusis

29
Q

Used for bilateral/asymmetric ( > 20 dB)

two tones of same frequency are introduced simultaneously to both ears. Only louder one will be perceived.

A

Stenger Test

30
Q

Failed to respond

indicates they actually hear it in their poor ear

A

Positive Stenger

31
Q

Respond

suggests absense of nonorganic loss

A

Negative Stenger

32
Q
  • OAEs
  • ABRs
  • Pure tone thresholds but use ascending method
A

Audiological Tests to Consider for Nonorganic HL

SPRING 13 Disorders of Hearing (6 decks)

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