1.
sympathetic nerve; sympathetic nervous system
the part of the autonomic nervous system that activates the body's fight-or-flight response, increasing heart rate, blood pressure, and alertness
ストレスで交感神経が優位になる。
The sympathetic nervous system becomes dominant due to stress.
交感神経が活発になると心拍数が上がる。
When the sympathetic nervous system becomes active, the heart rate rises.
夜になっても交感神経が高ぶったままだと、なかなか眠れなくなる。
If the sympathetic nervous system remains heightened at night, it becomes difficult to fall asleep.
Part of the 自律神経 (autonomic nervous system), responsible for the body's active, alert state. Composed of 交感 (sympathetic, responsive) + 神経 (nerve). Commonly discussed in health articles about stress, sleep, and relaxation techniques.
COMMON COLLOCATIONS:
- 交感神経が優位になる — the sympathetic nervous system becomes dominant
- 交感神経が活発になる — the sympathetic nervous system becomes active
- 交感神経と副交感神経 — sympathetic and parasympathetic nerves
- 交感神経の興奮 — sympathetic nerve excitation
THE AUTONOMIC NERVOUS SYSTEM:
- 自律神経 — autonomic nervous system (umbrella term)
- 交感神経 — sympathetic (fight-or-flight: accelerates heart, dilates pupils)
- 副交感神経 — parasympathetic (rest-and-digest: slows heart, promotes digestion)
SIMILAR WORDS:
- 副交感神経 — parasympathetic nerve (the complementary system for rest)
- 自律神経 — autonomic nervous system (includes both)
- 末梢神経 — peripheral nerve