Systole-Diastole du Cortex/Matière Grise & Effets sur le SNC dans son ensemble et sur l'Organisme entier

The Economy of the Animal Kingdom, volume III, La Fibre, extraits:

Chapitre 4, no 107, p. 36: “The spaces between the meninges, the lateral ventricle and also the fourth ventricle, the interior sanguineous receptacles, the intercalated clefts and retiform plexuses, all give abundant opportunity for this expansion.“    [...]    “Their use is not only that they may receive any excess of blood, and may help in dilating the brains, but also and more especially that they may hold the brains to a just measure of expansion. For it is known that the brains swell in gladness, courage, and hope, but are contracted in sadness and fear; and yet in every such state induced by the affections of the animus they continue their animatory alternations. Hence the effects that follow are either stronger or weaker; hence also the cerebrum is streched, as in wakefulness, and its beds relaxed as in sleep.“

Chapitre 5, no 113, p. 39: [...]  “By every alternation in the animation of the brain, and also by the force of its own cineritious substance, this whole medullary structure is stretched lengthwise, and expanded breathwise.  Exactly accordong to the direction of the fibres which are so many little canals capable of extention and expansion, for they are images of the arteries.“ [...] “For between the integuments is a space into which it swells; at the back are cavities; and in front is stretched a longitudinal intendation.“  [...] “But the internal directions of  the motions are as many as the nerves which are to issue forth through the cranies of the vertebrae, and to which the directions refer themselves as to their axes and peduncles;“ [...]

Chapitre 5, no 115, p. 40: “In general, this medullary crust is so expanded and elevated that is surges towards the posterior region of the spine but not towards the anterior.“ [...]

Chapitre 5, no 116, p. 40: [...] “Such is the nature of the determination of the fibres of the medullary substance, the direction of the motions and active forces, amd the fluxion of the spirits of the encephalon. From these, by the mediation of the nerves, organic forms and motor power are raised up in the body, and renewed, actuated, and vivified. For according to the state of this formative substance, causes flow into their effects, and forces into their modes, suitably to the intuition and representaion of the soul.“ [...]

Chapitre 5, no 117, p. 41: “Wherefore, from its very beginning, the fibre is concieved, born, bent and determined to a use in the mediaes and extremes, which is forseen and present.“ [...] “Surely no such thing would happen unless this activity and determination were impressed upon them by some superior  mind which is concealed from our inferior mind, and which sends forth ministering fibres, like so many rays, for the performance of its ordinances, and the carrying out of its decisions. ”