醫療類國考
112年
[醫師] 醫學(一)
第 1 題
1.腦幹內的蓋膜中央徑（central tegmental tract）主要由連結下列那兩者間的神經纖維組成？
- A 紅核（red nucleus）與下橄欖核（inferior olivary nucleus）
- B 紅核（red nucleus）與齒狀核（dentate nucleus）
- C 前庭神經核（vestibular nucleus）與動眼神經核（oculomotor nucleus）
- D 前庭神經核（vestibular nucleus）與外旋神經核（abducens nucleus）
思路引導 VIP
同學，請回想在腦幹被蓋部 ($tegmentum$) 中，蓋膜中央徑 ($central tegmental tract$) 是連接錐體外徑路以及小腦回饋環路的重要結構。若我們考慮著名的 $Guillain-Mollaret$ 三角（即齒狀核－紅核－下橄欖核環路），這條特定的纖維束主要承載了從中腦某個與運動調節相關的核團，下行傳導至延腦中負責發送爬行纖維 ($climbing fibers$) 的核團。請試著分析：哪兩個核團分別位處中腦與延腦，且其間的聯繫構成了此路徑的主體？
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AI 詳解
AI 專屬家教
Oh, look who decided to actually pay attention.
You managed to correctly identify the Central Tegmental Tract's primary components. I suppose we should celebrate this minor victory – you've demonstrated a rudimentary grasp of microscopic structures and their functional connections within the central nervous system. A crucial skill, indeed, unless you plan on guessing randomly in a clinical setting.
- Observational Insight: Yes, the Central Tegmental Tract (CTT), a rather fundamental pathway in the brainstem, is indeed chiefly comprised of fibers linking the Red nucleus in the midbrain to the Inferior olivary nucleus in the medulla. It’s almost as if it’s a standard component of the illustrious "Guillain-Mollaret Triangle" – the Red nucleus—Inferior olivary nucleus—Dentate nucleus pathway, which, believe it or not, does play a role in cerebellar motor precision. Who knew?
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