2 



II.WDHUI IK Hi I'HYSIill.l ICY 



NLl'ROI'HYSIOl.tHIY III 



double response, 471 



histological correlates, 473 

 due to cortical or subcortical lesions, 



499 

 due to mechanical stimulation, 467 

 due to thermal stimulation, 467 

 end organs, 465 

 endoerines and, 498 

 experimental subjects for, 464 

 fibers mediating, 468-475 

 frequency of discharge and, 468 

 frontal lobectomy and, 468 

 in second sensory area, 495 

 indifference, 496 

 inflammation and, 463 

 inhibition and, 499 

 ischemia and, 463 

 length of discharge and, 468 

 multiple innervation and, 476 

 parasympathetic nerves and, 483 

 perception 



reticular formation and, 756 

 pricking, 472 



threshold, 462 

 quantitation, 463 

 reaction, 496 

 reaction time to, 473 

 receptors, 465 

 1 eferred, 499-502 



injury to central paths and, 50 1 



summation, 500 

 reflexes 



lesions inhibiting, 464 

 related to itching, 498 

 related to tickling, 498 

 remembered alter mesencephalic stimu- 

 lation, 490 



representation in cerebral hemispheres, 



493 

 Second response to, 471 

 significance to individual, 460 

 somatic and visceral receptors, 4*17 

 sympathetic nerves and, 480 

 tissue damage and, 461 



Pain libers 



association with tempei aim e libers, 484 

 conduction, 47-' 



diameter and, 469 



ischemia and, 469 

 in anti rolati 1 al 1 olumn, 486 

 in anterior roots, 479 

 in cerebral hemispheres, 192 

 in medulla oblongata, 487 

 in meseni ephalon, 488 

 in postei ior roots, 479 



in 1 ensor area 495 



in spinal cord, 1 ■"• 



in thala 190, Jin 



insulation and, 477 



ited and unmyelinated, \8 , 



Spei iln ilv foi pain. |tn 



Pain threshold 



constancy. 462 



electrical stimulation, 462 



nerve nets and, 476 



thermal radiation and, 461 

 Pallidofugal paths 



as efferent path for extrapyramidal 

 motor system, 871 

 Pallidum 



see also Basal ganglia; Caudate nucleus, 

 Corpus striatum, Lenticular nucleus; 

 Putamen 



anatomy, in different species, 876 



connections with hypothalamus, 964 



cortical connections, 887 



external, lesions in, 878 



function, 920 



lesions of, 874, 876 



nucleus endopeduncularis in carnivores 

 and rodents, 876 



pathology in various diseases, 878 



relation to Parkinsonism, 877, 887 



sensorimotor integration and, 815 



stimulation of, 876 



studies in man, 877 

 Panting 



central control, 1 182 



mechanisms of, 1 181 



salivation and, 1 186 



upper brain stem and, 1 1 13 

 Pantothenic acid 



deficiency, neural function and, 1900 



function, 1900 

 Papez circuit 



anatomy, 1347, 1537 



contributory experimental work, 1733 



emotion and, 1347, 1536 



emotional behavior, 1536-1542 



olfactory cortex and, 546 

 Paraplegia 



reticular formation and, 1297 

 Parasympathetic nervous system 



see also Autonomic nervous system 



cholinergic transmission in. 230-233, 



979 



organization, 981 

 pain and, 483 

 problems of, 982 

 transmitters in, 230-233, 979 

 vasodilator nerves 



peripheral distribution, 1 1 37 

 physiological properties, 1138 

 vasomotor regulation and, 1157 

 I'.n asympathin 



. ( Iholinergic transmitter 

 role m cholinergic transmission, 233 

 l'.ii .1. 'ttii icular nucleus 

 see also I hypothalamus 

 water deprivation, 1049 

 Paresis 



trol, ca ebral 1 ortex and, 7 < 1 1 



due to pv 1 .11111. t. ii.iiiiv :i (8 



Parietal cortex 



lesions of, 827 



motor activity, 827 



motor integration, 812 

 Parinaud's syndrome 



colliculi and, 1 101 

 Parkinsonism 



see aim Rigidity; Tremor 



description of, 865 



gamma innervation of muscles in, 886, 

 910, 920 



lesions in, 885 



mechanism of, 919 



muscle length and tension in, 886 



nerve pathways in, 885 



origin of resting tremor, 886, 907 



pallidum in, 887 



surgical treatment, 885, 887 



tremor, electromyographs of, 908 

 Partial epilepsy ; see Epilepsies, partial 

 Parturition 



oxytocic hormone and, 1032 

 Pattern discrimination 



ablation studies and. 1464 



tactual, 1464 



visual and auditory. 1464 



visual cortex ablation and. 1464 

 Pattern recognition: see Vision 

 Pavlovian conditioning: see Conditioning 

 pC0 2 : see Carbon dioxide tension 

 Pelecypods 



see also Invertebrates 



ocelli structure in, 630 

 Pellagra 



nutritional deficiencies in, 1 nou 

 Penis 



warmth receptors in, 444 

 Pentylenetetrazol 



pharmacological elicits on svnapse, 175 

 Pentylenetetrazol seizures 



see also Anoxia, convulsions; Convul- 

 sions generalized, Epilepsy; Strych- 

 nine convulsions 



anoxic convulsions and, 340 



cortical reactivity, 340 



grand mal epilepsy and, 341 



strychnine convulsions and | i" 

 Peptic nil ei 



hypothalamus and, 1741 



psychosomatics and. 1740 

 Perception, 1595-1661 



w, alui Frequency discrimination; Pat- 

 tern discrimination; Space dis- 

 crimination . Vision 



aspens nl spaiial localization. 1623 



1638 

 \iil« -rt phenomenon and, 



description. 1 -,ql> 



figure and mound, 1605 



(, < si. 1I1 psychology and. 1602. 1607 



habituation, 1656 



haptic illusions, it)-,ti 



\\<lun. I ■ :■■ Volumi II ■ 1440 Volume 111 pages i/ji 1 •/'.'. 



