The attached video is about a small parasympathetic ganglion known as the otic ganglion which is functionally associated with glossopharyngeal nerve and it innervates the parotid gland for salivation. You will also come across some nearby structures associated with the gross anatomy and branches of this ganglion. 0:54 Four parasympathetic ganglia 4:53 Auriculotemporal nerve 5:42 Facial nerve (CN VII) 6:53 Inferior salivatory nucleus 7:36 Tympanic branch 8:00 Tympanic plexus 8:05 Lesser petrosal nerve 8:30 Petrous part of temporal bone 8:47 Infratemporal fossa 8:47 Otic ganglion 8:57 Auriculotemporal nerve to parotid gland 10:05 Postganglionic sympathetic neurons