[Long-latency auditory evoked potentials in cochlear implants].
Cortical evoked potentials were evaluated in patients with cochlear implants. In a group of 8 adults of different ages, the lingual state before implantation and during rehabilitation were evaluated. Using cortical evoked potentials, the results of the P300 wave in response to two tones, one frequent (1,000 Hz) and the other infrequent (2,000 Hz), presented at 70 and 80 dB HL were studied. Results were analyzed and compared in relation to locutive state, rehabilitation stage, and intensity of stimulus. Absolute latencies did not differ significantly. However, latency values in relation to reaction time were significantly longer in prelingual than in postlingual patients (p < 0.05, Student <<t>> test). The results confirmed the normality of central cognitive processes in patients with cochlear implants in objective assessment of P300 latency. The results suggest differences between prelingual and postlingual patients in relation to central signal processing.
Mata
J J
JJ
Centro Audiológico S. L., Sevilla, 41011, España. centaudiologico@cim.es
Jiménez
J M
JM
Pérez
J
J
Postigo
A
A
Roldán
B
B
D000161:Acoustic Stimulation / Q000379:methods; D000293:Adolescent; D000328:Adult; D003054:Cochlear Implants / Q000706:statistics & numerical data; D005072:Evoked Potentials, Auditory; D005500:Follow-Up Studies; D034381:Hearing Loss / Q000503:physiopathology / Q000534:rehabilitation; D006801:Humans; D008875:Middle Aged; D011930:Reaction Time