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An Explanation of the two Tables of the Nerves.
THe thirty pairs of the nerves of the marrow of the brain, whilest it is carried through the spine or ridge, are ex∣prest in these two Tables, the present and the following one. We have inscribed common characters on both of them; though many also be peculiar to one; after which we have presently set the number of the Table. But the first shews the rack-bones of the spine and the nerves that issue from thence on the foreside; the second on the backside.
as far as to 7. The seven rack-bones of the neck.
to 19. The twelve rack-bones of the chest.
to 24. The five rack-bones of the loins.
to 30. The six bones of the Os sacrum. These same figures do stand for the pairs of the spi∣nal marrow.
The seat of the spinal marrow, where it first enters into the rack-bones.
The first pair of the neck, whose forwarder propagations is B; the hinder C.
The second pair, whose fore-propagati∣on is D, its hinder E, from this two bran∣ches grow out; the slender one marked with the letter E, the other thick one with F, which is mixed with a branch of the third pair M, about G. But the course thereof to the skin of the crown, and back side, of the head is marked with the letter H.
The third pair of the neck, whose fore-branch I is divided into four propagations. The first K is implanted into the muscles, that bend the neck. The second L is mixt with a twig of the fourth pair Q. The third M, is mixt with the thicker propagation of the hinder branch of the second pair F. The fourth N is inserted into the muscles that are joined to the trans-verse processes of the rack-bones.
The fourth pair of the neck, whose fore-branch P is cleft into three propagations. The first Q joins with the second propagati∣on of the third pair L. The second R goes into the transverse muscle of the neck.
The fifth pair of the neck, whose fore-branch V issues out some surcles. The first goes to the muscles that bend the neck, being to be seen in the first table between V, and the number 6. The second X making the greatest part of the nerve of the midriff. The third Y goes to the muscle Deltoides, of which there is a propagation, a, which goes to the skin, that covers the muscles Deltoi∣des, and Biceps. The fourth b, at the neck of the shoulder-blade is cleft into two bran¦ches; one of which, c, enters into the mus∣cle Deltoides, at what part it grows out of the Collar-bone: the other d, is implanted into the same, in the place where it grows out of the spine of the shoulder-blade.
The sixth pair of the neck, whose fore∣branch f, when it has propagated that sur∣cle g; which with the fourth and fifth pair, S and X, makes the nerve of the midriff, is joined with the two following, h, and thus it makes up the nerve of the midriff i, so that this arises out of three surcles S, X, and g. The hinder branch l.
The seventh pair of the neck, whose fore-branch is m, its hinder one n.
The first pair of the chest, whose fore-branch o, it united, p, with the seventh pair of the neck and second of the chest, spreading a propagation q, through the upper side of the first rib. The hinder branch r.
The second pair of the chest, whose fore-branch sends forth a surcle t, running out through the first space betwixt the ribs, and sending surcles u to the muscles of the chest.
The pairs of nerves from the ninth to the twentieth, which have the same series of propagations, and especially to the distan∣ces of the ribs. The fore-branches of those (fig. 1.) are scattered into the muscles seated on the forepart of the chest, and partly into their upper region, as y, partly in their low∣er z, which in women go also to the breasts; and then they send other surcles into the heads of the oblique descending muscles of the abdomen α, and into that which leads the arm from the breast β, another goes to the nipple of the breast γ. The hinder bran∣ches δ.
The first nerve that goes to the arm, which is scattered into the skin of the outside of the arm.
The second nerve that goes to the arm, whose two first propagations η η goe to the two heads of the muscle Biceps; then it joins with the third nerve by a surcle †. Thirdly. it carries a propagation to the longer muscle that turns the palm of the hand downward θ. But about the bending of the cubit it is di∣vided into two branches, an outer, and an inner one χ. That descending along the ra∣dius or wand, is inserted at the out side of the seond joint of the the thumb λ. This χ is by and by subdivided intr an outer μ, and an inner branch ν. This ν is again cleft in the region of the cubit into an outer branch ο, and an inner one π.
The third nerve entring the arm••, be∣fore it attains to the arm, scatters a sprig be∣twixt the Pectoral muscle, and Deltoides σ. By and by having entred the arm, it distri∣butes another, τ, into the second muscle, that bends the cubit After that discending it re∣ceives a branch from the second nerve; when it is past the bought of the arm, it is