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action activity animal appears archipallium aroused axons body brain brain-stem branches bulb bundle called canal cavity cell-body cells central central fissure centres cerebellum cerebral cerebral hemispheres cerebrum chemical cochlea color compare Fig complex conduction connected consciousness cortex dendrites dorsal roots electrical elements end-organs excited fact fibres fibrils fissure frontal functions ganglia ganglion gray matter gyre hemispheres human impulses inner intensity inter-brain light lobe localization membrane mental method mid-brain molecular motor area motor nerve movements muscles muscular myelin nerve-cells nerve-centres nerve-fibres nervous mechanism nervous system neural tube neuroglia nuclei occipital lobe olfactory optic organs pallium pass phenomena physical physiological portion psychology receptors reflex regarded region retina scratch reflex sensations sense sense-organs sensory sheath side skin smell spinal cord spinal ganglia stimulus structure substance surface terminate thalamus theory tion tissue tones tracts ventral roots ventricle vertebrates vibrations white matter
Page 705 - His erudition and his broadmindedness are on a par with each other ; and his volume will probably for many years to come be the standard work of reference on the subject.
Page 503 - ... the subjective concomitant of the normal amount of activity, not directly connected with life-serving function, in the peripheral end-organs of the cerebro-spinal nervous system.
Page 187 - Because the distance between the front and back of the eye is so great that the image of distant objects is formed in front of the retina ; but when objects are brought near to the eye, their image is thrown farther back, and made to fall on the retina.
Page 186 - ... excitation of which may vary in quality, quantity, local coloring, and sequence of the different elements excited. But in order that the retina may exercise its function with the precision and delicacy of detail for which its structure fits it, the rays of light reflected from a single point of the surface of the visible object must excite a single one, or at most a small and definite group, of the retinal nervous elements. The sensations thus occasioned can then undergo a systematic arrangement...
Page 651 - In more particular description of the connection between the mind and the brain, it may be said that all intercourse between material objects and the spiritual subject involves three processes —a physical, a physiological, and a psychical. In these processes the perceived object and the perceiving subject mutually condition each other. This fact, however, does not destroy the necessity, under which all scientific investigation finds itself, of assuming that both object and subject exist as real...
Page 503 - Pleasure is the concomitant of the healthy action of any or all of the organs or members supplied with afferent cerebro-spinal nerves, to an extent not exceeding the ordinary powers of reparation possessed by the system.
Page 422 - When the line of regard passes from its primary position into any other position, the torsion of the eye (as measured by the angle of torsion) in the second position is the same as if the eye were turned about a fixed axis standing perpendicular to both the first and the second positions of the line of regard.
Page 526 - But even the most elementary aesthetic feelings cannot be considered as on a par with the sensuous feelings, or as mere aggregates of such feelings. * The tone of feeling which characterizes the sensations furnishes a material, as it were, for genuinely (Esthetic feeling ; but the latter always implies also the working of certain intellectual laws, and a union of the simple feelings of sensation under time-form and space-form.