The Encyclopedia Britannica1899 |
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Page 24
... influence of electrical stimulation of nerves demands more elaborate description . The effects , as already indicated , can be observed only when the nerve is connected with a muscle or with a central organ . In the first case ...
... influence of electrical stimulation of nerves demands more elaborate description . The effects , as already indicated , can be observed only when the nerve is connected with a muscle or with a central organ . In the first case ...
Page 25
... influence of the two poles of any arrange- ment supplying a continuous current , that is , he has tried the stimulating effect , supposing either the positive or the negative pole be applied to the nerve whilst the other is in contact ...
... influence of the two poles of any arrange- ment supplying a continuous current , that is , he has tried the stimulating effect , supposing either the positive or the negative pole be applied to the nerve whilst the other is in contact ...
Page 27
... influences were conveyed to a muscle which caused the muscle to contract . As these influences passed outwards from a nerve - centre towards the periphery of the body they were also termed " efferent " nerves . On the other hand ...
... influences were conveyed to a muscle which caused the muscle to contract . As these influences passed outwards from a nerve - centre towards the periphery of the body they were also termed " efferent " nerves . On the other hand ...
Page 29
... influence over still lower centres in the spinal cord . This arrangement is termed the " superposition of reflexes " ( see fig . 9 ) . ( f ) Stimulation of a sensory surface may simultaneously pro- duce , by a reflex mechanism ...
... influence over still lower centres in the spinal cord . This arrangement is termed the " superposition of reflexes " ( see fig . 9 ) . ( f ) Stimulation of a sensory surface may simultaneously pro- duce , by a reflex mechanism ...
Page 30
... Influence of Nerves on Blood - Vessels . - If the sympathetic nerve be divided in the neck , there is a dilatation of the vessels and an incrcase of temperature on the same side ; but irritation by weak induction - currents of the ...
... Influence of Nerves on Blood - Vessels . - If the sympathetic nerve be divided in the neck , there is a dilatation of the vessels and an incrcase of temperature on the same side ; but irritation by weak induction - currents of the ...
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17th century absorbed acid action animal appears artistic become body brain called carbon cards cause cells centre century cerebellum character chief chiefly chlorophyll church clavichord colour connexion consists contains cord corpora quadrigemina death disease early effect England English epic epidemic especially existence feet fibres France French ganglia geotropic gland Government Greek grey matter hand harpsichord important influence irritation king known later less Lithuania living London medulla oblongata ment metabolism metal miles movement muscles nature nerve nerve-cells nervous observed organs oxide oxygen Paris pass Phædo physiological piano Pindar Pinturicchio Pisa Pisistratus Pitt Pius plague plants plate platinum Plato player Płock Podolia poet poetry poison Poland Poles Polish Polycladida posterior pressure probably produced protoplasm regarded Roman Rome Russian sensory side silver Socrates spinet substance surface temperature tion tissue town tube Vistula whole writers