The Relation of Science and Religion.pdf - Online Christian Library
The Relation of Science and Religion.pdf - Online Christian Library The Relation of Science and Religion.pdf - Online Christian Library
HIGHER ORGANISMS. 217placed underneath, and directly above the upperpart of the spine. Most important ofthese is the cere6ellunz1 or little brain, whosefunctions are now generally believed to b'eclosely connected with the equilibrium of thebody when moving. Somewhat nearer thecentre, and quite under the brain proper isthe pons or bridge, providing for the interlacingof the fibres on their way out from thethe central organ, and just below that are certainelongated bodies (medulla 06longata), consistingof masses of fibre just above the spinalcord.Before closing this very brief and hasty descriptionof the nerve system, there is onepeculiarly striking arrangement to which specialreference may be made. The mass ofnerve fibre which passes down within theback-bone constituting the spinal column,which is formed in two divisions equivalentto the hemispheres of the brain, gives out ateach of the vertebr~ or spinal joints a supplyof nerve for the portion of the body contiguous.This supply is sent out from each sideof the column, and issues in two roots, a posteriorand anterior; the posterior root being abody of sensory nerves, the anterior root of
218 SCIENCE AND RELIGION.motor nerves. Shortly after passing out, thesetwo form into one, uniting to constitute a nervetrunk. Just after they have thus united, thetrunk again opens up into two, and in eachone of these two a share of the sensory andmotor roots finds a place, and thus preparationis made for sending out towards both the frontand back of the body suitable proportion ofboth sets of nerves. The two roots drawntogether as if to bind them into one, are bysome inexplicable process subdivided, and thetwo bands issuing from the united band arefound to have each a share of the contents ofeach root. Of all the singular occurrencescoming under scientific observation there isnothing more surprising. The fact is certain,but there is no scientific explanation of' thecontrivance by which such a singular result issecured.Having now before us in outline a representationof the nervous system of man, andhaving in this a guide to the understandingof the prominent features involved in the distributionof two orders of nerves over thebody, and their concentration in a centralorgan, we are prepared for considering thecomparative brain development presented to
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218 SCIENCE AND RELIGION.motor nerves. Shortly after passing out, thesetwo form into one, uniting to constitute a nervetrunk. Just after they have thus united, thetrunk again opens up into two, <strong>and</strong> in eachone <strong>of</strong> these two a share <strong>of</strong> the sensory <strong>and</strong>motor roots finds a place, <strong>and</strong> thus preparationis made for sending out towards both the front<strong>and</strong> back <strong>of</strong> the body suitable proportion <strong>of</strong>both sets <strong>of</strong> nerves. <strong>The</strong> two roots drawntogether as if to bind them into one, are bysome inexplicable process subdivided, <strong>and</strong> thetwo b<strong>and</strong>s issuing from the united b<strong>and</strong> arefound to have each a share <strong>of</strong> the contents <strong>of</strong>each root. Of all the singular occurrencescoming under scientific observation there isnothing more surprising. <strong>The</strong> fact is certain,but there is no scientific explanation <strong>of</strong>' thecontrivance by which such a singular result issecured.Having now before us in outline a representation<strong>of</strong> the nervous system <strong>of</strong> man, <strong>and</strong>having in this a guide to the underst<strong>and</strong>ing<strong>of</strong> the prominent features involved in the distribution<strong>of</strong> two orders <strong>of</strong> nerves over thebody, <strong>and</strong> their concentration in a centralorgan, we are prepared for considering thecomparative brain development presented to
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