PRINCIPLES OF PHYSIOLOGY. 



453 



Conceptions, how caused, 25 ; impressions 

 or representations of, 26 ; definition of 

 natural, or organic and arbitrary voli- 

 tions, 27 ; dependent on material ideas, 

 ib.\ preceded by sensations, 65; of 

 the understanding, 7^ ; of the me- 

 mory, 71 ; their relation to attention, 

 abstraction, meditation, and reflection, 

 77 ; either please or displease, 80 ; 

 their relation to material ideas, 97- 

 151 ; necessary to true sentient ac- 

 tions, 123, see Actions sentient ; their 

 course independent of others, 125; 

 sensational and intellectual, 347 ; in- 

 ternal impressions of, 359 note. 

 Conceptive force [Empfindhchkeit], 65 

 Congestion, theory of, 207, 462 

 Connatural, as applied to agreeable ex- 

 ternal sensations, 191, 196, 440 

 Connection, reciprocal, defined, 345 

 Consciousness, 80 

 Contractility, so called [Reiz], 3 

 Contranatural, as applied to disagreeable 



external sensations, 191, 196, 200 

 Convulsions, their nature, 204 



Death, definition of, 703 ; the spiritual 

 of a reasoning animal, 704; sensa- 

 tional, 705 ; complete, 706 ; natural, 

 707 ; animal, 708 ; from what com- 

 plete, may result, 711 716; animal 

 life may continue after proper, 717 



Desires, how developed in the mind, 81 ; 

 three things to be distinguished in, 

 84-87 ; may be sensational or intel- 

 lectual, wholly sensational, or more 

 spontaneous, 89 ; sensational, nature 

 of, 90 ; intellectual nature of, 96 



Despair, a distressing passion, 313; its 

 sentient actions may be induced by 

 the vis nervosa only, 571 



Diaphragm, the, is sensitive, and sub- 

 ject to the will, 171 ; its sentient ac- 

 tions from external sensations, 208 ; 

 is capable of direct nerve-actions, 464 ; 

 may be excited by non-conceptional 

 internal impressions, 523; its natural 

 action in respiration, 525 ; a centre of 

 animal forces, 673, 688 



Dichtungskraft, the poetic faculty, 248 



Distress, how excited and developed, 

 309; its mental actions and various 

 forms, ib. 



Dreams, the rules applicable to, 67-69 ; 

 70, 236 ; sensational foreseeings often 

 produced in, 75, 247 



Emotions, the, nature of, 91 ; their effect 

 on the penis, 178 ; strong sensational 

 stimuli conjoined in, 258 ; effects of 

 the pleasing or distressing, how regu- 

 lated, 259 



Empfindung, commonly used in a three- 

 fold sense, 34 note. 

 Empfindlichkeit, see Sensibility. 

 Erdichtungen, fictions, 70 

 Ersetzung, see Substitution. 

 Excitants of the feelings, see Peelings. 

 Exhilaration, the instinct for, 287, ii 

 Expectations, see Anticipations. 

 External impressions, see Impressions. 

 External sensations, see Sensations. 



Faculty, the higher perceptive, 76; the 

 poetic, 228 



Fear, a distressing passion, 313, in what 

 resembles and differs from terror, 320 ; 

 may be induced by the vis nervosa 

 only, 571 



Feelings, incitements of the, 83 ; are 

 sensational or intellectual, 88 ; add a 

 special sentient action to those of con- 

 ceptions, 250 ; excite the origin of 

 those nerves by which vital move- 

 ments are regulated, 251 



Flesh, the, 90 ; warring against the spi- 

 rit, 337 



Food, the instinct for, its sensational 

 stimulus, 281 ; its effects as a foresee- 

 ing, 282 



Forces of physical bodies, the general, 3 ; 

 their aggregate, 4 



Forces, animal, see Animal forces. 



Forces, animal-sentient, or cerebral, na- 

 ture of, 6 note, 82 and note; their 

 actions, 97-110 ; their relations to the 

 vis nervosa, 541-597 ; their reciprocal 

 connection, 590-597 



Forces, nerve, defined, 6 ; depend on the 

 vital spirits, 21 ; what retard the ac- 

 tion of, 22 ; what strengthen and en- 

 liven, 23 



Forces, primary vital, nature of the, 675 ; 

 the two reciprocally subordinate, 676 



Forebodings, the nature of, 73 



Foreseeings, nature of, 73, 23^; relations 

 of, to desires and aversions, 81 ; rela- 

 tions of, to instincts and passions, 90- 

 94 ; in what differ from true expecta- 

 tions, 249; accompanying the depres- 

 sing passions, 315-328 



Free will, 96. See Will. 



Gall-bladder, see Bladder. 



Ganglia, are possessed by the motor 

 nerves, 14 ; do not possess true cere- 

 bral tissue, 35 note-, 624, iv; their 

 probable use, 48, iv; their functions 

 maybe changed through habit, 49, iv; 

 probably deflect external impressions, 

 48, iv, 399 ; to the motor nerves per- 

 form the office of brain, 399 



GefiJhl, the external feeling of the 

 nerves, 402 



