Jbarah Rema, Geal-Dor Miriam, Rich Shanit, Adler Miriam, Yehezkely Michal Kaufmann
J Basic Clin Physiol Pharmacol. 2013;24(3):205-8. doi: 10.1515/jbcpp-2013-0077.
Implantation at a young age enables exposure to language and speech during the critical age for language acquisition. Long duration of auditory deprivation may lead to less optimal results.
A retrospective review of cases was performed. A young girl with congenital bilateral profound sensorineural hearing loss received her first cochlear implant on the right side at the age of 2½ years and successfully developed good speech and language. At the age of 10 years, explantation had to be performed, and as reimplantation could not be done on the same side, the implantation was done on the left ear, which had never received auditory stimulation. Two age-matched girls with bilateral sequential implantation, in whom the second sound-deprived ear was implanted after a long duration, were studied as well.
A year after implantation, in two of the cases there was very good speech perception, even in noise. In one case, the second ear never attained the ability to understand speech.
These results can be explained in light of recent findings that early unilateral stimulation can result in bilateral representation in the auditory cortex.
幼年植入人工耳蜗可使患儿在语言习得的关键期接触语言和言语。长期听觉剥夺可能导致效果欠佳。
进行病例回顾性研究。一名先天性双侧重度感音神经性听力损失的年轻女孩在2岁半时首次在右侧植入人工耳蜗，并成功发展出良好的言语和语言能力。10岁时，不得不进行人工耳蜗取出手术，由于无法在同一侧进行再次植入，遂在从未接受过听觉刺激的左耳进行植入。还研究了另外两名年龄匹配的双侧序贯植入人工耳蜗的女孩，她们中第二个失聪耳在长时间后才植入。
植入一年后，其中两例即使在噪声环境下也有很好的言语感知能力。有一例中，第二只耳朵始终未获得理解言语的能力。
鉴于最近的研究结果，即早期单侧刺激可导致听觉皮层的双侧表征，这些结果可以得到解释。
