An introductory psychology, with some educational applications . ed theassociation areas. The cor-tex of the cerebrum, whileonly about one eighth ofan inch, or less, in thick-ness, covers a much greaterarea than the size of theskull would indicate, onaccount of its dipping intothe folds and fissures of thebrain tissue. ^..^ ^.„...v. „ „, , ^ ^ ^ -, ^ regions; o, fibers between frontal andpart of the brain, the white temporal regions; 4, fibers between matter the so-rallerl assori- occipital and temporal regions; 5, corpusmatter, tne so caifea asSOCl callosum, the fibrous tracts connecting atin
An introductory psychology, with some educational applications . ed theassociation areas. The cor-tex of the cerebrum, whileonly about one eighth ofan inch, or less, in thick-ness, covers a much greaterarea than the size of theskull would indicate, onaccount of its dipping intothe folds and fissures of thebrain tissue. ^..^ ^.„...v. „ „, , ^ ^ ^ -, ^ regions; o, fibers between frontal andpart of the brain, the white temporal regions; 4, fibers between matter the so-rallerl assori- occipital and temporal regions; 5, corpusmatter, tne so caifea asSOCl callosum, the fibrous tracts connecting ating or connecting tracts or the hemispheres fibers, form, as was saidabove, the main bulk ofthe hemispheres. Theyconnect the two hemi-spheres, connect the lowerparts of the brain withthe sensory and themotor areas on thecortex, connect neigh-bors on the cortex, sen-sory, and motor, connecteach and all of these p^j. 9. fibers connecting the cerebralwith the various higher cortex with lower brain centers in the frontallobes and Figs. 8 and 1, fibers from frontal region to pons; 2, motor fibers; 3, sensory fibers, touch; 4, sensory fibers, sight; 5, sensory fibers, hearing 46 AN mTRODUCTOEY PSYCHOLOGY The sympathetic system. The nervous system is com-posed, as stated above, of the brain, the spinal cord, andthe peripheral neurones of the sensory and motor sort, andin addition to these, the sympathetic nervous system, aboutwhich a few words ought to be said here. It is, of course,composed of nerve cells or neurones like all nerve is located, in part, near the spinal cord, running up anddown in two groups of strings, one on each side of the there are sets of ganglia in various parts of the trunk,more or less connected together, more or less neurones composing the sympathetic system seemto act somewhat in conjunction with the brain and spinalcord, and in part independently. They are the nervousbasis of the so-called automatic a
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