In a case of fracture of middle cranial fossa, lesion of which of the following structure result in absence of tears?
Greater petrosal nerve is a branch of facial nerve. It traverse through the petrous pa of temporal bone, middle cranial fossa, pterygoid canal and pterygopalatine fossa to ultimately supply secretory function to the lacrimal gland. So in case of fracture of middle cranial fossa, this nerve is damaged which in turn lead to absent innervation of lacrimal glands and absent tears.
Ciliary ganglion
Cervical ganglion
Trigeminal ganglion
Greater petrosal nerve