456 



INDEX TO UNZER'S 



Nerve-actions {continued) 



occur without cerebral force, or brain, 

 362 ; change of sentient actions into, 

 367; advantages to reasoning animals 

 from, 370 ; machines must be supplied 

 with nerves, to be capable of, 390, 391 ; 

 of the heart, 392 ; of the oesophagus, 

 stomach, &c., 393 ; of the glandular 

 tissues, 394 ; of the sexual organs, 395^ 

 of the instincts, 396 ; of unfelTln- 

 ternal impressions, 397 ; of reflected 

 impressions, 398 ; of the brain's vis 

 nervosa, 409 ; from several external 

 impressions at the same time, do not 

 confuse each other, 412; different kinds 

 of impressions difficult to be discrimi- 

 nated from their, 413 ; from a reflected 

 external impression occur in the proper 

 machine, 415, ii; from reflected im- 

 pression often misunderstood, 415, iii; 

 how far the brain necessary to, 416, 

 494, 511 ; direct and indirect, 419, 425 ; 

 how enfeebled or prevented, 427-430; 

 their relation to external sensations, 

 433, 438 ; how resemble the sentient, 

 435-437 ; why they excite our wonder, 

 438 ; are connatural or contra-natural, 

 440 ; muscular fibre peculiarly adapted 

 to direct, 445 ; in muscles, 449-453, 

 513; in the heart, 455, 517, 518; in 

 the membranes, 464 ; in the capillaries, 

 463 ; of the stomach, 469, 470 ; of the 

 viscera, 475-479; of the senses, 480; 

 of the sexual organs, 481 ; of non-con- 

 ceptional internal impressions, 483, 

 494, 506, 507, 524-544 ; produced by a 

 primary internal impression, 490, 496, 

 498 ; of imaginations or foreseeings, 

 549 ; of the sensational desires and 

 aversions, 530 ; of the blind instincts 

 and emotions, 551 ; of the sensational 

 instincts, 552, 561 ; of the instinctive 

 passions, 562 ; of the passions, 563- 

 567 ; three principal kinds of, in the 

 mechanical machines, 580; threefold 

 division of those of primary non-con- 

 ceptional internal impressions, 581; 

 substitution of, for sentient actions and 

 vice versa, 541, 589 ; from a sensational 

 conception, 591 ; in the foetus, 634 



Nerve feeling, its nature, 31 ; from with- 

 out inwards, 32 ; internal, 121 



Nerve forces, see Forces. 



Nervous fluid, see Vital spirits. 



Nerves, all arise from the brain, 12 ; their 

 course, 13 ; their external terminations, 

 14 ; division of, into motor and sensitive, 

 14; contain the vital spirits, 15 ; dif- 

 ferent efl"ects of impressions on different 

 parts of, 31; how animal actions ex- 

 cited in their medulla, 32 ; of motion 



Nerves (continued) 



and sensation, no difference of in 

 receiving and transmitting impressions, 

 33 ; sensational force of, 34 ; external 

 impressions on, 35-39, 55 ; impressions 

 on the cerebral origin of, 121 ; action of 

 material ideas in, 122, 142-151, 405; 

 impressions of the conceptions on, 124, 

 125 ; probably have aflferent and efferent 

 fibrils, 126-127 ; hidden movements 

 in them inferred, 145, 404, 405 ; erec- 

 tion of their terminations, 147-150; 

 vivid impressions probably deflected at 

 their bifurcations, 151; effect of a 

 cerebral impression at their loops, 160; 

 their action on the muscles, 162-164, 

 510 ; various ways in which may in- 

 fluence the secretions and circulation, 

 167-180 ; the action of external sensa- 

 tions through them, 181-227; actions 

 of imaginations through them, 228- 

 238 ; actions of the sensational foresee- 

 ings through them, 239-249 ; actions of 

 sensational pleasure and pain through 

 them, 250-254 ; actions of the sensa- 

 tional desires and aversions through 

 them, 255-261 ; actions of the sensa- 

 tional instincts through them, 262-304 ; 

 actions of the passions through them, 

 305-329 ; actions of intellectual plea- 

 sure and pain through them, 333-334 ; 

 actions of the will through them, 335- 

 336 ; the principal seat of the primary 

 vis nervosa, 372 ; vis nervosa must be 

 a general property of, 375 ; impressions 

 on the sensory, 376, 377; external 

 feeling of, 402 ; internal feehng of, 405- 

 407; secondary points in them, probable 

 for the reflexion of impressions, 428 ; 

 nerve-actions explained from the doc- 

 trine of afferent and eflferent fibrils in, 

 486-488 ; their ordinary stimuli caus- 

 ing internal impressions, 489 ; the pe- 

 culiar kind of irritation of their medulla 

 to produce a certain kind of internal 

 impression, unknown, 492 ; changes in, 

 from non-conceptional internal impres- 

 sions, 504 ; eflfect of opium on, 558 ; 

 their growth, and development in new 

 growths, 647 ; their daily wear and 

 repair, 662 



(Esophagus the, action of the nerves on, 



170: direct nerve-actions of, 466-468; 



nerve-actions from non-conceptional 



internal impressions, 531 

 Offspring, the instinct for, 262, iv 

 Organic life, what, 5 

 Organic machines, in what diflfer from 



artistic, 5 ; when termed animal, 6 



