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. 2017 Jan 2;35(2):153–155. doi: 10.1136/acupmed-2016-011216

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(A) Craniotomy and brain removal. (B) A wet-preserved scull, showing the position of the acupuncture needle. (C) Exposure of the pterygopalatine fossa and sphenopalatine ganglion. After removing tissues along the petrous bone, the pterygoid body was removed to expose the pterygopalatine fossa from behind. The red arrow indicates the sphenopalatine ganglion. The yellow arrow indicates the choanae (marked here to indicate the direction). (D) Acupuncture needle touching the sphenopalatine ganglion (indicated by the red arrow). The yellow arrow indicates lifting of the branches of the trigeminal nerve.