疾病機轉
如果針灸對偏頭痛有效，可能透過哪些生理機轉？以下把「偏頭痛的病理」與「針灸可能的作用點」分開整理，每條標註證據強度與出處。
針灸不是改變病名，而是切入疾病過程中的某些環節。先看偏頭痛本身的病理。
偏頭痛的病理核心是三叉血管系統活化，合併中樞與周邊敏化及神經發炎。
Trigeminovascular activation with central/peripheral sensitization and neuroinflammation.
Migraine pathogenesis involves activation of the trigeminal vascular system, central and peripheral sensitization, and neuroinflammation.
CGRP 扮演主導角色；MAPK 與 NF-κB 訊號調控神經肽釋放、膠細胞活化並放大痛覺訊號。
CGRP dominant; MAPK / NF-kB signaling drives neuropeptide release, glial activation, nociceptive amplification.
CGRP plays a dominant role; activation of MAPK and NF-kB signaling regulates neuropeptide release, glial cell activation, amplification of nociceptive signals.
慢性疼痛（含偏頭痛）呈現廣泛腦功能異常：預設模式網絡、感覺運動網絡與痛覺／情緒區（ACC、楔前葉、腦島、視丘）。
Widespread functional brain abnormalities across DMN, sensorimotor network, ACC, precuneus, insula, thalamus.
Chronic pain shows widespread functional brain abnormalities: default mode network, sensorimotor network, and pain/emotion regions (anterior cingulate cortex, precuneus, insula, thalamus).
偏頭痛伴隨腸道菌相失衡與腸腦軸失調；失衡破壞腸屏障與血腦屏障，並活化三叉神經血管系統與中樞發炎。
Gut dysbiosis / gut-brain axis dysfunction disrupts barriers and activates the trigeminal neurovascular system and central inflammation.
imbalance promotes disordered intestinal metabolites, destruction of intestinal barrier and blood-brain barrier, activation of trigeminal neurovascular system and central inflammation.
以下每個機轉獨立呈現，有多少證據說多少話，不強行串成一張圖。滑鼠移到卡片會顯示該機轉的文獻。
綜述作者自陳可能是對失調腦網絡的「狀態依賴再校準」，非固定專屬路徑。
針刺在穴位局部經 ATP 與 TRPV 通道啟動周邊訊號，中樞調節內源性類鴉片、血清素、正腎上腺素等以誘發鎮痛。
Peripheral ATP/TRPV initiation at acupoint; central modulation of endogenous opioids, serotonin, norepinephrine to induce analgesia.
Peripheral: ATP and TRPV channels at acupoint. CNS: opioids, serotonin, norepinephrine, orexin, endocannabinoid modulated to induce analgesia.
針灸經 HPA 軸降低周邊 COX-2 與 PGE2，並介導周邊類鴉片釋放（周邊抗發炎鎮痛）。
Acupuncture reduces peripheral COX-2 and PGE2 via the HPA axis and mediates peripheral opioid release.
Peripheral COX-2 and PGE2 reduced via HPA axis, mediating peripheral opioid release.
針灸相關腦變化最一致地出現於功能連結、局部神經同步與自發活動改變，呈以前扣帶迴（ACC）為中心的雙向調節。
Most consistent changes: altered functional connectivity, neural synchrony, spontaneous activity in an ACC-centered, bidirectional pattern.
Acupuncture-related brain changes most consistently in altered functional connectivity, local neural synchrony, regional spontaneous activity; ACC-centered circuit pattern; bidirectional modulation.
審慎詮釋：針灸的腦效應可能主要反映對失調腦網絡的「狀態依賴再校準」，而非固定的專屬路徑。
Effects may predominantly reflect state-dependent recalibration of dysregulated brain networks rather than a fixed point-specific pathway.
acupuncture effects may predominantly reflect state-dependent recalibration of dysregulated brain networks.
針灸可能經多靶點調節菌相與益生菌豐度、保護腸與血腦屏障，並緩解壓力與負面情緒。
Acupuncture may regulate microbiota, protect intestinal/blood-brain barriers, and relieve stress.
Acupuncture can regulate microbiota diversity and beneficial bacteria abundance through multiple targets, reduce harmful metabolites, protect intestinal barrier and blood-brain barrier integrity, relieve stress/negative emotion.
格式：AMA。點連結可查原文。