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第四頸神經.
第四頸神經(cervical spinal nerve 4, C4)是頸節脊神經的第四個分支[1],發源自第三頸椎上方。
第四頸神經支配的皮節(Dermatome)負責肩峰鎖骨關節感覺[2]。支配的肌節負責提肩。
C4腹枝與C1-3腹枝共同組成頸神經叢(Cervical plexus)。
- 鎖骨上神經:與C3共同負責鎖骨上下的皮膚。[3]
- 分節支(Segmental branches):C1-C4,支配前斜角肌與中斜角肌。
- 提肩胛肌支:C3-C4,該肌肉另外也有來自臂神經叢(Brachial plexus,C5-T1)的肩胛背神經(C5)支配。
- 膈神經:C3-C5,以C4為主,支配橫膈與心包膜。
C4腹枝不經頸神經叢支配的肌肉如下:
- 內側分支由頭半棘肌(Semispinalis capitis)與頸半棘肌(Semispinalis cervicis)之間通過,穿入斜方肌(Trapezius)與夾肌(Splenius),抵達後頸皮膚。
- 外側分支支配頭最長肌(Longissimus capitis)、頸最長肌(Longissimus cervicis)及頸髂肋肌(Iliocostalis cervicis)。
-
第四頸神經
-
投影放射攝影,個案有
後頸及左肩疼痛,在第四頸神經處有
椎間孔硬化問題,影響C4皮節。
|
---|
| 頸 | 腹枝 | |
---|
| 背枝 |
- 頸神經背側分支
- 枕下神經(C1)
- 枕大神經(C2)
- 第三枕神經(C3)
|
---|
|
---|
| 胸 |
- T1
- T2
- T3
- T4
- T5
- T6
- T7
- T8
- T9
- T10
- T11
- T12
腹枝 |
- 肋間神經
- 肋間臂神經(T2)
- 胸腹神經(T7–T11)
- 肋下神經(T12)
|
---|
| 背枝 | |
---|
|
---|
| 腰 |
|
---|
| 薦 |
|
---|
| 尾 | |
---|
|
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