It is directly perform'd by Conjugations or Pairs, whereof one goes to the Right-hand, and the other to the Left: There are nine Pairs of them that proceed from the Medulla Oblongata and enter into the Skull; and a Tenth that comes from the Marrow which lies between the Occipital and the first Vertebra of the Neck. It
passeth thro' the Hole of the Dura Mater, thro' which the Vertebral Artery enters, to distribute its Branches into several Parts.
To what Use are the nine Pairs of Nerves appropriated, which proceed from the Root of the Brain?
They are chiefly design'd for the Senses, and also for the Motion of their Organs, of which the Ancients discover'd only seven.
The first Pair of Nerves is call'd the Olfactory, and serves for the Smelling.
The second Pair is the Optici or Visorii Nervi, and bestows upon the Eyes the Faculty of seeing.
The third is term'd Motorii Oculorum, being serviceable for the Motion of the Eyes.
The fourth Pair is nam'd Oculorum Pathetici, which shews the Passion of the Mind in the Eyes, whereto it imparts a String as well as to the Lips.
The fifth is call'd the Gustative, and appropriated to the Taste, because it sends Twigs more especially to the Tongue, as also to the Fore-head, Temples, Face, Nostrils, Teeth, and Privy-Parts.
The Sixth is likewise for the Taste, and goes to the Palate.