Norrsell U, Ramsing S, Rosenhall U, Blomstrand C
Department of Clinical Neuroscience, Göteborg University, Sweden.
Scand J Rehabil Med. 1996 Mar;28(1):19-25.
Cerebral lesions causing aphasia are often found close to auditory areas. The aphasia may therefore sometimes be aggravated by hearing problems, which are concealed by communicative restrictions. Unilateral lesions of the cerebral auditory system influence the functional ear preference disclosed by dichotic tests. For that reason we have examined aphasic patients with recent, initial, unilateral brain infarctions for ear preference with regard to dichotically presented two syllable words. In a consecutive series of 114 patients who could cope with the test, 29 showed signs of an acquired left ear advantage (LEA). All were offered, and 22 accepted a full scale audiological examination including pure tone, speech and phase-audiometry. Nine of these patients showed retrocochlear or central hearing disturbances, which added to their communicative predicaments. The LEA of 11 patients lacked audiological rationales and a compensatory shift of cerebral speech-lateralization cannot be excluded.
导致失语症的脑损伤常常出现在听觉区域附近。因此，失语症有时可能会因听力问题而加重，而这些听力问题被交流限制所掩盖。大脑听觉系统的单侧损伤会影响双耳分听测试所揭示的功能性耳偏好。出于这个原因，我们研究了近期发生首次单侧脑梗死的失语症患者在双耳分听呈现双音节词时的耳偏好。在连续的114名能够完成测试的患者中，29名表现出获得性左耳优势（LEA）的迹象。所有人都接受了，22人接受了全面的听力学检查，包括纯音、言语和相位测听。这些患者中有9名表现出蜗后或中枢性听力障碍，这加剧了他们的交流困境。11名患者的左耳优势缺乏听力学依据，不能排除大脑语言侧化的代偿性转移。
