Magnetic Fields from the Auditory Cortex of a Deaf Human Individual Occurring Spontaneously or Evoked by Stimulation through a Cochlear Prosthesis

Hoke, M.; Pantev, Christo; Lütkenhöner, Bernd; Lehnertz, Klaus; Sürth, W.

doi:10.3109/00206098909081621

Cited by 14 publications

(1 citation statement)

References 11 publications

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“…It has been reported that the recording of N1 might be useful in the assessment of patients with cochlear implants [112][113][114]. These investigators used the N1 response to validate that the auditory cortex could be stimulated by a cochlear implant.…”

Section: Originsmentioning

confidence: 99%

Hearing as Reflected by Middle and Long Latency Event-Related Potentials

Jacobson¹,

Kraus²,

McGee³

1997

Advances in Oto-Rhino-Laryngology

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One of the few ways of obtaining neural information in humans is with evoked responses. Research in auditory evoked responses has gone through an evolution over the past 30 years. Initially, there was intense interest in the development of long latency responses (i.e. evoked responses with latencies exceeding 50 ms) as a method for 'objectively' assessing auditory system sensitivity. With the advent of more efficient computers, attention was focused on shorter latency responses beginning with the 'fast' responses (now referred to as middle latency responses) and then with the auditory brainstem response. The discovery of the auditory brainstem response brought forth an explosion of investigations that demonstrated the usefulness of this response for assessment of auditory system sensitivity and the transmission capabilities of the pontine auditory pathways. The bulk of these investigations occurred between 1975 and 1985. Beginning in the early 1980s and continuing today there has been renewed interest in both the middle and long latency auditory evoked responses and the nonmodality-specific endogenous responses. Interest in these electrical events with longer latencies is rooted in the knowledge that they originate from more rostral structures (midbrain, thalamus, cortex), and thus, provide us with information about auditory processing at a higher level than can be assessed with the auditory brainstem response. That is, these longer 1 Portions of this chapter were modified from references 34, 137, 244 and 245.

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Section: Originsmentioning

confidence: 99%

Hearing as Reflected by Middle and Long Latency Event-Related Potentials

Jacobson¹,

Kraus²,

McGee³

1997

Advances in Oto-Rhino-Laryngology

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Derzeitiger Stand der Cochlear Implants

Lehnhardt

1989

Teil II: Sitzungsbericht

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Die Messung später elektrisch evozierter Potentiale des auditorischen Systems bei CI-Patienten

Hoth

1998

HNO

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The current adjustment of cochlear implant (CI) speech processors is based on a knowledge of the lower and upper limits (T- and C-levels) for electrical stimulus currents. These data are usually acquired from subjective classifications of individual patients. In cases with non-reliable patient responses, objective methods are necessary. Especially for the estimation of correct T-levels, auditory evoked potentials (AEP) can be applied, since they allow the determination of response thresholds in a frequency-specific manner. By determining the AEP of different latencies, late cortical responses can be registered almost without artifact contamination. These patients have been examined in 20 patients provided with 22- or 8-channel CI-systems (Nucleus or Med-EI implants). In all cases, clear responses and clearly discernible threshold transitions could be detected. By making use of acoustical stimulation in a free sound field, subjective hearing threshold and the T-levels of electrical stimulation could be verified. Since late responses are generated in the primary auditory cortex, their assessment permits a nearly integral functional control of the aided hearing system. To date, no problems have occurred from maturation or attentional effects in either pediatric or adult patients. The applicability in very young children remains to be explored.

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Magnetic Fields from the Auditory Cortex of a Deaf Human Individual Occurring Spontaneously or Evoked by Stimulation through a Cochlear Prosthesis

Cited by 14 publications

References 11 publications

Hearing as Reflected by Middle and Long Latency Event-Related Potentials

Hearing as Reflected by Middle and Long Latency Event-Related Potentials

Derzeitiger Stand der Cochlear Implants

Die Messung später elektrisch evozierter Potentiale des auditorischen Systems bei CI-Patienten

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