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Suboccipital region after GON block using 5 mL of dye solution.
Note: The red asterisk indicates the suboccipital triangle.
Abbreviations: GON, greater occipital nerve; TON, third occipital nerve; OCI, obliquus capitis inferior; OCS, obliquus capitis superior; RCM, rectus capitis posterior major; SP, spinous process; TP, transverse process.
