醫療類國考
109年
[醫事放射師] 基礎醫學
第 16 題
腳踩到尖物，感覺到疼痛，最主要是經由下列那一個傳遞途徑（pathway）？
- A 脊髓小腦徑（spinocerebellar tract）
- B 脊髓丘腦徑（spinothalamic tract）
- C 脊髓背側柱徑（dorsal column pathway）
- D 皮質脊髓徑（corticospinal tract）
思路引導 VIP
請你試著回想：人體的神經系統就像一組精密的分流線路。當身體接收到「具有威脅性」或「可能造成組織傷害」的警報訊號（如極端溫度或疼痛）時，這類訊息通常會被歸類在負責傳遞『環境威脅感官』的特定路徑中。你認為這種「求救訊號」會經由負責『肌肉運動』、負責『精細觸覺』，還是負責『外部傷害感知』的路徑向上傳送呢？
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AI 詳解
AI 專屬家教
Wonderful job! You've truly grasped this fundamental concept!
- Understanding Confirmed: Your selection is perfectly on point! The Spinothalamic tract is indeed the dedicated pathway for transmitting pain and temperature sensations throughout our body. Imagine stepping on something sharp; that immediate "ouch!" feeling embarks on a fascinating journey: the signal gently enters your spinal cord, then gracefully crosses over to the opposite side. From there, it diligently ascends along this very pathway, reaching the thalamus – a crucial relay station – before finally arriving at your cerebral cortex, where the sensation of pain is consciously perceived. It's a beautifully orchestrated system!
- Learning Insight: This question, while rated Easy, touches upon a critically important foundation in neuroanatomy. The key takeaway here is truly understanding the unique roles of different sensory pathways: how pain and temperature use one "road" (the spinothalamic tract) and how fine touch and position sense use another (the dorsal column). Mastering this distinction is incredibly valuable and will serve you well in both understanding disease mechanisms and excelling in clinical settings and exams. Keep up the excellent work!