I) Trigeminal is the largest cranial nerve.

II) Vagus nerve is with vague or extensive distribution.

III) Olfactory is the smallest (in length) cranial nerve while trochlear is smallest in thickness

IV) Trochlear nerve shows largest intracranial course.

V) Buccal nerve is the only sensory branch of anterior division of mandibular nerve.

VI) Smallest branch of trigeminal nerve is opthalmic.

VII) Smallest branch of trigeminal nerve is opthalmic.

VIII) The branch of nasociliary that is frequently absent is posterior ethmoidal.

IX) Posterior superior alveolar nerve is a branch of maxillary nerve in pterygopalatine fossa.

X) Infraorbital nerve (middle & anterior superior alveolar nerves) is a branch of maxillary nerve in orbital groove. Middle superior alveolar nerve is present only in 28% of individuals.

XI) Mandibular nerve is largest of three branches of the trigeminal nerve.

XII) Inferior nerve is larger terminal branch of Mandibular nerve.

XIII) Greater Palatine nerve is also known as anterior Palatine nerve. Lesser palatine nerve induces middle and posterior Palatine branches.

XIV) Nervus intermedius is sensory branch of facial nerve.

XV) Nervus spinosus is from meningeal branch of main trunk of mandibular nerve.

XVI) Greater petrosal nerve is a branch of facial nerve and is parasympathetic to lacrimal glands, glands of nose and pharynx. The ganglion associated with greater petrosal nerve is pterygo Palatine ganglion.

XVII) Lesser petrosal nerve is a branch of GLOSSOPHARYNGEAL nerve and it is parasympathetic to parotid gland through auriculotemporal nerve. The ganglion associated with lesser petrsoal nerve is otic ganglion.

XVIII) The deep petrosal nerve is a branch of carotid plexus round the internal carotid artery. It joins the greater petrosal nerve to form nerve of pterygoid canal

XIX) External petrosal nerve is a branch of the sympathetic plexus round the middle meningeal artery.

Source: Dental Pulse MCQS for Dental PG Entrance Examinations. Volume 1,11th edition.