. The brain as an organ of mind. proceed from or to the Viscera are mostly distributed alongthe course of the Blood-vessels. Some of the fibresof this system are specially distributed to the coatsof the Vessels, and are, from the nature of theirfunctions, known as vaso-motor nerves. A portion must have afferent func-tions whilst others transmit efferent impulses, causing thevessels to contract, so that bymeans of such nerves, theamount of blood flowing throughparticular vascular territoriesmay be easily regulated. The vaso-motor nerves are con-nected with small ganglia dis-tributed ov
. The brain as an organ of mind. proceed from or to the Viscera are mostly distributed alongthe course of the Blood-vessels. Some of the fibresof this system are specially distributed to the coatsof the Vessels, and are, from the nature of theirfunctions, known as vaso-motor nerves. A portion must have afferent func-tions whilst others transmit efferent impulses, causing thevessels to contract, so that bymeans of such nerves, theamount of blood flowing throughparticular vascular territoriesmay be easily regulated. The vaso-motor nerves are con-nected with small ganglia dis-tributed over the vessels. Tosome extent motor stimuliemanate from these, though thewhole Vaso-motor system ofthe body seems to be amenableto the influence of a regulativecentre situated in the Medulla,together with other subordinate. Fig. 170.—One of the SympatheticGanglia from the right Lateral Cordof the Rabbit. (Owen, after Kol-liker.) Tr, Literal cord of Sympa-tem probably contains its own thetlc; Rc, Rc, two communicating centres in the Spinal the Sympathetic Sys- intrinsic afferent and efferent branches ; Spl, Splanchnic or Vis- ceral nerve ; s, small nerve; g, gan- nerves, it also seems to send ^^^^^ ^®^ ^^ ^^^^^- (^ about 40 diameters.) (through the before-mentioned communicating filaments) afferent nerves to the greymatter of the Spinal Cord, and to receive therefrom certainefferent motor and other fibres. This great SympatheticSystem of nerves is to a certain extent an independently 476 INTERNAL STRUCTURE OF HUMAN ERAIN. develo])ed system, though it also holds relations to theSpinal Cord closely resembling those which exist betweenthe two Cerebral Systemic Nerves, and the Medulla. By the arrangements above described, not only is theharmonious activity of related Viscera facilitated, but th
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Keywords: ., bookcentury1, booksubjectbrain, booksubjectpsychologycomparative
