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. The seventh is the _Auditive_ Nerve, that enters into the _Os Petrosum_, where it divides it self into many Branches, which when gone forth, are distributed to the Muscles of the Tongue, Lips, Mouth, Face, Fore-head, Eye-Lids, &c. The eighth is the _Os Vagum_, or wandering Pair, which is united to the Intercostal Nerve, as also to the Recurrent, Diaphragmatick, Mesenterick, &c. {60} The ninth Pair, after having form'd a Trunk with the eighth, disperseth its Twigs several ways, whereof one is join'd with the Twig to the tenth, to be distributed together into the Muscle _Sternohyoideus_, and into the Tongue. The _Intercostal_ and _Spinal_ are not Pairs of Nerves, but only Branches or Twigs of other Pairs. _What is the Distribution and Use of the thirty Pairs of Nerves that proceed from the Spinal Marrow?_ There are seven that go forth from the several _Vertebra's_ of the Neck, twelve from those of the Back, five from the Loins, and six from the _Os Sacrum_, according to the following Progression. The first of the seven Pairs of Nerves of the Neck proceeds from between the Occipital Bone and the first _Vertebra_, nam'd _Atlas_, its Fibres being lost in the Muscles of the hinder-part of the Head and Neck. The second Pair springs from between the first and second _Vertebra_ of the Neck; the Fibres whereof are lost in the Muscles of the Head, and in the Skin of the Face. The third Pair issueth from between the second and third _Vertebra_ of the Neck; and its Fibres are lost in the Flexor Muscles and Extensors of the Neck. The fourth, fifth, sixth, and seventh Pairs proceed from between the _Vertebra's_, as before, but their Fibres are lost in the Neck of the _Omoplata_, in the Arm, and in the _Diaphragme_ or Midriff. Here it ought to be observ'd by the way that the Arms receive Branches not only from the {61} four last Pairs of the Nerves of the Neck, but also from the two first Pairs of the Back, which are extended even to the end of the Fingers: Whence it happens that in the Palsie of the Arms, Remedies are usually apply'd to the _Vertebra's_ of the Neck; and that in Phlebotomy or letting Blood, care must be taken to avoid pricking the Nerve, which accompanies the Basilick Vein in the Elbow.