105年:醫學二(2)

下列有關中樞聽覺傳導路徑的敘述,何者最正確?

Acochlear nuclei →inferior colliculus →medial geniculate body →auditory cortex
Bcochlear nuclei →superior colliculus →medial geniculate body →auditory cortex
Ccochlear nuclei →inferior colliculus →lateral geniculate body →auditory cortex
Dcochlear nuclei →superior colliculus →lateral geniculate body →auditory cortex

詳細解析

本題觀念:

中樞聽覺傳導路徑(central auditory pathway)為神經科學及生理學的經典考點。從耳蝸核(cochlear nuclei)開始,訊號依序上傳至腦幹、中腦及視丘,最終抵達聽覺皮質(auditory cortex)。本題考查各中繼站的正確順序與解剖名稱。

選項分析

(A) cochlear nuclei → inferior colliculus → medial geniculate body → auditory cortex 正確。聽覺訊號從耳蝸神經→耳蝸核(cochlear nuclei,延腦)→(經橄欖核及外側蹄系 / lateral lemniscus)→下丘腦板(inferior colliculus,中腦四疊體下丘)內側膝狀體(medial geniculate body,視丘)初級聽覺皮質(primary auditory cortex,顳葉 Heschl's gyri)

(B) cochlear nuclei → superior colliculus → medial geniculate body → auditory cortex 錯誤。上丘腦板(superior colliculus)是視覺的中腦中繼站,不在聽覺傳導路徑上。聽覺傳導經過的是**i

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