. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . s and viscera of the body. The involuntary musclesin the coats of these vessels and in the walls of the viscera are thusrelated, and through the sympathetic fibres brought into connec-tion with the cerebro-spinal axis. The three main plexuses re-ferred to are collections of nerve-cells and a dense plexiform ar-rangement of nerve-fibres. One of them is situated at the base of 68 GROSS STRUCTURE OF THE NERVOUS SYSTEM the heart, to which it gives off bra
. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . s and viscera of the body. The involuntary musclesin the coats of these vessels and in the walls of the viscera are thusrelated, and through the sympathetic fibres brought into connec-tion with the cerebro-spinal axis. The three main plexuses re-ferred to are collections of nerve-cells and a dense plexiform ar-rangement of nerve-fibres. One of them is situated at the base of 68 GROSS STRUCTURE OF THE NERVOUS SYSTEM the heart, to which it gives off branches that wind around thatorgan and penetrate its muscular substance; another is placed atthe upper part of the abdominal cavity, and gives origin to numer-ous plexiform branches that supply the viscera of the abdomen;the third is in front of the last lumbar vertebra, and supplies thevaso-motor nerves and nerves of the muscular coats and mucousmembranes of the various organs in that region of the body. Fur-ther details in the anatomy of the sympathetic nervous system areof little interest to psycho-physical studies. To such studies it is. Fig. 24.—The Cranium Opened to Show the Falx Cerebri and Tentorium Cerebelli, and thePlaces of Kxit for the Cranial Blood-vessels. (Schwalbe.) a, a, Falx; 6, 6, thetentorium; 3, 3, Sinus transversus, and 2 to 3, Sinus rectus, receiving from in front theVena magna Galena; 4, internal jugular vein; 5, superficial temporal vein; and 6, mid-dle temporal vein. of great interest, however, to know that this system forms a bondbetween the sensations, emotions, and ideas which have theirphysical basis in the molecular condition of the cerebro-spinalcentres, and those various organs in the thoracic and abdominalregions whose condition is so closely related to such psychicalstates. § 5. The Brain and Spinal Cord are the great centres of the cere-bro-spinal system. These bodies are situated in the bony cavity ofthe skull and spinal column. They have t
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectpsychophysiology
