Lacrimation is lost in lesion of?

Greater petrosal nerve Lacrimal gland is supplied by the lacrimal nerve which is both sensory and secretomotor.The secretomotor fibres to the gland runs as follows: Lacrimatory nucleus (or superior salivatory nucleus) nervusintermedius -4 geniculate ganglion greater petrosal nerve --> nerve of the pterygoid canal --> pterygopalatine ganglion (relay of secretomotor fibres) --> zygomatic nerve -4 zygomaticotemporal branch --> lacrimal nerve --> lacrimal gland.