37th Exam (Jan 2025) Morning Q20 Kaigo Fukushishi
Question (original Japanese)
次のうち、顔の感覚に関与する脳神経として、正しいものを1つ選びなさい。
- 1嗅神経
- 2三叉神経
- 3顔面神経
- 4迷走神経
- 5舌下神経
Show answer
Correct answer 2
Key pointThe trigeminal nerve carries facial sensation; the facial nerve moves the muscles of facial expression.
Explanation
The trigeminal nerve is a cranial nerve that carries skin sensation of the face (touch, pain, and temperature) and moves the chewing muscles, so 2 is correct.
- 1: The olfactory nerve carries the sense of smell, so it is wrong.
- 3: The facial nerve is involved in moving the muscles of facial expression and in taste for the front two-thirds of the tongue, etc., but it does not carry skin sensation of the face, so it is wrong.
- 4: The vagus nerve handles parasympathetic functions such as the work of internal organs, so it is wrong.
- 5: The hypoglossal nerve moves the tongue, so it is wrong.
Explanation in Japanese
三叉神経は顔面の皮膚感覚（触覚・痛覚・温度覚）を伝えるとともに、咀嚼筋を動かす脳神経なので2が正しい。
- 1：嗅神経はにおいの感覚を伝えるので誤り。
- 3：顔面神経は表情筋の運動や舌の前方3分の2の味覚などに関わり、顔の皮膚感覚は担わないので誤り。
- 4：迷走神経は内臓の働きなど副交感神経の機能を担うので誤り。
- 5：舌下神経は舌の運動を担うので誤り。