Changes in Brainstem and Cortical Auditory Potentials During Qi-Gong Meditation

1990 ◽  
Vol 18 (03n04) ◽  
pp. 95-103 ◽  
Author(s):  
Guo-long Liu ◽  
Rong-qing Cui ◽  
Guo-zhang Li ◽  
Chi-ming Huang
Keyword(s):  
Auditory Evoked Potentials ◽  
Health Benefits ◽  
Brain Structures ◽  
Auditory Brainstem ◽  
Evoked Response ◽  
Qi Gong ◽  
Auditory Evoked Response ◽  
Middle Latency Response ◽  
Latency Response ◽  
Cortical Auditory Evoked Potentials

"Qi Gong" (QG) is a meditation exercise known for thousands of years in China and has always been widely practiced. It has been claimed to have a variety of healing and other health benefits. To provide an understanding of the effect of QG on brain structures along the whole neural axis from the periphery to the cerebral cortex, we have monitored short-latency auditory brainstem evoked response, middle-latency response, and long-latency cortical auditory evoked potentials, before, during, and after QG. Our results showed that QG caused an enhancement of brainstem auditory evoked response with a concomitant depression of cortical responses. These observations may be related to the healing and other health benefits of QG.

scholarly journals Auditory evoked potentials as yardstick for tinnitus

2021 ◽  
Vol 7 (5) ◽  
pp. 789
Author(s):  
Shrutinath Banerjee ◽  
Nilanjan Paul ◽  
Indranil Chatterjee ◽  
Ishita Das ◽  
Rima Das ◽  
...  
Keyword(s):  
Auditory Evoked Potentials ◽  
Otoacoustic Emission ◽  
Prognostic Indicator ◽  
Auditory Brainstem ◽  
Tinnitus Retraining Therapy ◽  
Middle Latency Response ◽  
Retraining Therapy ◽  
Brainstem Response ◽  
Latency Response ◽  
Middle Latency

<p class="abstract"><strong>Background:</strong> Aiming to evaluate the recent theoretical postulates on tinnitus underscoring the role of thalamocortical neural tracts, the present study: explores middle latency response (MLR) as a possible physiological measure of tinnitus: thus investigates the predicted exaggeration of P<sub>a</sub>-N<sub>a</sub>, N<sub>a</sub>-P<sub>b</sub> interpeak amplitudes in tinnitus patients and; explores middle latency response (MLR) as a prognostic indicator of tinnitus retraining therapy (TRT), thus evaluates possible decrease in P<sub>a</sub>-N<sub>a</sub> and N<sub>a</sub>-P<sub>b</sub> amplitude after 2 weeks exposure to tinnitus retraining therapy.</p><p class="abstract"><strong>Methods:</strong> An experimental group was constructed by randomly assigning 30 patients with mean age 38.5 years and complaining of debilitating tinnitus but with normal hearing for the study. MLR was administered on patients with normal auditory brainstem response (ABR) and otoacoustic emission (OAE) both pre- and post-tinnitus retraining therapy.  </p><p class="abstract"><strong>Results:</strong> Results demonstrated no significant effect on P<sub>a</sub>, N<sub>a</sub> and N<sub>b</sub> absolute and interpeak latencies. However, significantly exaggerated P<sub>a</sub>-N<sub>a</sub> and N<sub>a</sub>-P<sub>b</sub> interpeak amplitudes between experimental and control groups as well as pre and post therapeutic groups were found.</p><p class="abstract"><strong>Conclusions:</strong> This proves that MLR may adequately reflect thalamocortical hyperactivity in cases with distressing tinnitus and demonstrable improvement post TRT warrants the use of MLR as its prognostic indicator.</p>

Auditory Evoked Potentials in Audiometric Assessment of Compensation and Medicolegal Patients

1986 ◽  
Vol 95 (5) ◽  
pp. 514-519 ◽  
Author(s):  
Martyn Hyde ◽  
Noriaki Matsumoto ◽  
Peter Alberti ◽  
Yao-Li Li
Keyword(s):  
Evoked Potentials ◽  
Pure Tone ◽  
Clinical Utility ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Pure Tone Audiogram ◽  
Middle Latency Response ◽  
Widespread Implementation ◽  
Latency Response ◽  
Almost All

The clinical utility of auditory evoked potentials for validation of the pure tone audiogram in adult compensation claimants and medicolegal patients is examined. Large sample comparisons of evoked potential and conventional pure tone thresholds showed that the slow vertex response can estimate true hearing levels within 10 dB in almost all patients. Given adequate tester skills, it is the tool of choice, and it merits more widespread implementation. Properly used, it can improve and abbreviate the assessment battery for detection and quantification of nonorganic hearing loss. The 40-Hz middle latency response is useful as a secondary tool, but at present, cochlear nerve and brain stem potentials have limited audiometric value in this population.

Long-term course of Landau-Kleffner syndrome:

1999 ◽  
Vol 16 (1) ◽  
Author(s):  
Carla G. Matas ◽  
Renata A. Leite ◽  
Letícia L. Mansur ◽  
Laura M.F.F. Guilhoto ◽  
Maria Luiza G. Manreza
Keyword(s):  
Auditory Brainstem Response ◽  
Epileptic Seizures ◽  
Auditory Brainstem ◽  
Cognitive Domain ◽  
Speech Acquisition ◽  
Middle Latency Response ◽  
Brainstem Response ◽  
Latency Response ◽  
Middle Latency

Introduction. Landau-Kleffner Syndrome is characterized by normal speech acquisition followed by epileptic seizures, receptive and expressive language deterioration coupled with agnosia for non-verbal sounds, having variable long-term evolution. Case Report. It is described neurophysiologic and acoustic findings in a patient with Landau-Kleffner Syndrome, and correlate these with the results of a language evaluation carriedout 7 years after the acute phase. It is performed Electroencephalography, Immitance Measurements, Basic Audiometry, Auditory Brainstem Response, Middle Latency Response, and P300. Language was evaluated by Boston Diagnostic Aphasia Examination. Electroencephalography was normal and audiologic evaluation revealed normal Immitance Measurements, Basic Audiometry and Auditory Brainstem Response values. Anelectrode effect was present in the left hemisphere in Middle Latency Response, and bilateral P300 latencies delayed on the right. Language evaluation showed severe receptive and expressive impairment, severe phonemic substitutions, which had an impact on social and academic levels. There were contextual and gestual non-verbal compensations, evidencing intellectual and cognitive domain preservation. Conclusion. This case illustrates the specific cerebral areas that can be damaged in patients with Landau-Kleffner Syndrome and which are demonstrable by clinical evaluation and proper neurophysiology studies, showing the importance of neurological, audiological, electrophysiological and language exams in a longitudinal follow up.

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