PMID: 15224857Jul 1, 2004Paper

Middle-latency auditory-evoked magnetic fields in patients with auditory cortex lesions

Acta Oto-laryngologica
Kimitaka KagaA Uno

Abstract

To demonstrate the influence of auditory cortex lesions on auditory middle-latency responses (AMLRs) and middle-latency auditory-evoked magnetic fields (MLAEFs) in humans. A total of 15 normal subjects, 9 patients with left auditory cortex lesions and 1 patient with a right auditory cortex lesion were studied. MLAEFs were recorded from each hemisphere of the brain in a magnetically shielded room using a 37-channel SQUID gradiometer. Simultaneously, AMLRs were recorded from the scalp at the vertex, C3 and C4. Tone bursts were used as auditory stimuli. Pam responses of the MLAEF, which are typically evoked in the latency range of the Pa of the AMLR, and are localized at the auditory cortex as dipoles, were impaired or abolished over the left auditory cortex lesion in the patients with left-hemisphere lesions, but the Pa of the AMLR persisted. The main generator of the Pam in MLAEF was demonstrated to be the auditory cortex. The results also show that the Pa of the AMLR is evoked only partly from the auditory cortex.

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Citations

Dec 20, 2013·The Journal of Laryngology and Otology·J E BrookerS Burney
Jun 11, 2015·The Laryngoscope·Bibian M van LeeuwenAdrian A Kaptein
Sep 11, 2009·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·J RemenyiR J S Briggs
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Oct 20, 2007·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Davide TufarelliMario Sanna
Dec 20, 2007·The Journal of Laryngology and Otology·S-E StangerupJ Thomsen
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Jul 19, 2008·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Justine J VogelAdrian A Kaptein
Aug 15, 2017·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Stephen J BroomfieldRichard T Ramsden
Jan 10, 2012·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Anastasios Maniakas, Issam Saliba

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