<prompt> Thickest cranial nerve is-Trochlear nerveVagusFacial nerveTrigeminal nerve  <response>: Ans. is d i.e., Trigeminal nerve Longest intracranial course-Trochlear nerve Longest course overall and most widely distributed-Vagus Smallest thinnest cranial nerve-Trochlear nerve Largest thickest cranial nerve-Trigeminal nerve The only cranial nerve arising from dorsal aspect-Trochlear nerve Only cranial nerve decussating completely before emerging-Trochlear nerve Cranial nerve most commonly involved in basal skull fracture-Facial nerve Cranial nerve most commonly involved in raised intracranial tension-Abducent nerve Commonest cranial nerve affected in spinal anaesthesia-Abducent nerve Cranial nerve most commonly involved in intracranial aneurysm-Oculomotor nerve Cranial nerves carrying parasympathetic fibers-3, 7, 9, 10 