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Brain and Nerve No to Shinkei Volume 31, Issue 10 （October 1979）

Brain and Nerve 脳と神経 31巻10号（1979年10月発行）

Japanese English

原著

脳梁膨大部切断例の神経心理学的検討—第2報：Dichotic listening testによる聴覚認知につて NEUROPSYCHOLOGICAI, STUDIES OF Two SUBJECTS AFTER THE TRANSECTION OF THE SPLENIUM OF THE CORPUS CALLOSUM : PART 2. THE AUDITORY RECOGNITION BY THE DICHOTIC LISTENING TEST 渡辺俊三 ¹ , 北條敬 ¹ , 佐藤時治郎 ¹ , 田中輝彦 ² , 渡辺貴和子 ³ , 吉村伊保子 ¹ Shunzo Watanabe ¹ , Kei Hojo ¹ , Tokijiro Sato ¹ , Teruhiko Tanaka ² , Kiwako Watanabe ³ , Ihoko Yoshimura ¹ ¹弘前大学医学部神経精神科 ²青森県立中央病院脳神経外科 ³国立弘前病院耳鼻咽喉科 ¹Department of Neuropsychiatry, Hirosaki University, School of Medicine ²Aomori Central Hospital ³Hirosaki National Hospital pp.993-997

発行日 1979年10月1日 Published Date 1979/10/1

DOI https://doi.org/10.11477/mf.1406204478

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Abstract 文献概要
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I．はじめに

　脳梁損傷による半球間連合障害は，視覚，聴覚，触覚等の認知，および行為の問題など多岐にわたつている。脳梁膨大部切断例にあつては，視覚認知の検討が最も重要であるが，それと共に聴覚，触覚認知の検討も脳梁機能研究に欠くことができない重要な課題である。

　聴覚的認知の研究は，近年めざましいものがあり，純音による検査の他に特殊な語音検査の開発によつて，より高次の中枢障害の性状が明らかになりつつあるが，とくに両耳分離能検査〔Dichotic listening test （以下d．l．t．とす）〕は，脳梁切断例では興味ある研究手段といえる。

We made the neuropsychological auditory studies of two right-handed subjects who had undergone the transection of the splenium of the corpus cal-losum for the pineal operation (the teratoma by the histopathological examination). The transection grades were 2.0 cm and 2.5 cm. The truncus and splenium of the second subject were flat by the compression of the tumor.

We examined these subjects by the some audio-logical methods.

1. Pure tone audiometry.

2. Fixed frequency Bekesy audiometry.

3. SISI test (short increment sensitivity index test).

4. Speech audiometry.

5. Distorted speech test (filtered speech test).

6. Binaural fusion test.

7. Dichotic listening test,

The tasks used for the dichotic listening test were following. Different digits (one pair, three pairs), different words (from two to four syllables) and different vowels and consonants were presented simultaneously to the two ears by means of a dual-channel tape recorder with stereophonic earphone. The result shows that the first subject (whose section of the spelenium was 2.0 cm) shows a slight but not significant superiority on the right ear to the one pair digits and words (p<0.1), and the second subject (whose section of the splenium was 2.5 cm and whose splenium and truncus of the corpus callusum were flatten by the compression of the tumor) shows a significant superiority on the right ear to the one pair digits, words, three pairs digits and vowels (p<0.05). But there was no de-finitive abnormalities at the pure tone audiometry, the fixed frequency Bekesy audiometry, SISI test, distorted speech test and binaural fusion test of two cases.

The result shows that the commissure fibres of the auditory perception of the speech of two hemi-spheres connect through from splenium to the truncus of the corpus callosum.