1439 



diagram, 131 4 

 function, 1319 



interrelation with specific, 1 315-1 31 7 

 nucleus reticularis and, 1313 

 recruiting response, 1308-1310 

 relation to midbrain reticular forma- 

 tion, 1 31 7-1 319 

 stimulation, cortical response, 1308 

 thalamic distribution of, 1 310-1 31 5 



Urinary bladder : see Bladder 



Uterus 



amygdaloid stimulation and, 1405 



Vagus 



cardiac effercnts in, 1 138 

 cortical representation. 1 355, 1 360 

 pre- and postganglionic elements, 982 

 reflex center in medulla. 1 1 22 

 respiratory regulation, 1118, 1 120, 1 123 



Vasoconstrictor nerves 



central representation of, 1 138-1 151 



Vasomotor mechanisms 



see also Cardiovascular control 

 constrictor response, stimulus rate and, 



I '34 

 constrictor tone in various vascular 



beds, 1 1 35 

 neurons, location, 1 147 

 reflex arcs in spinal animal, 954 

 responses to cortical motor stimulation, 



B06 

 reticular formation and, 1 299 

 vasodilator center, critique of, 1 155 



Venous system 



nervous control of, 1 1 58 



pulse, impulse frequency of afferent 

 fibers and, 1 144 

 Ventral spinocerebellar tract 



sensory input and, 1 252 

 Ventromedial nucleus: see Hypothalamus 

 Vermes 



neurosecretory activity, 1 059 

 Vertebrates 



neurosecretion in, 1040- 1057 

 Vestibular mechanism 



destruction of, 1 1 04 



eye movements and, 1097 



input, motor integration and, 824 



reflex, eye movements and, 1095- 1097 



vision, 1 105 

 Vestibular nuclei 



projections from cerebellum, 1257 

 Vestibular nystagmus : see Nystagmus 

 Visceral brain 



critique of term, 1368 

 Visceromotor responses 



cortical stimulation and, 1355 

 Viscerosomatic reflexes 



evoked by splanchnic nerve stimulation, 



955 

 in decerebrate animal, 955 

 in spinal animals, 954 

 Vision 



contribution to motor integration, 823 

 vestibular mechanisms and, 1 105 



Visual axis 



awareness of, 1 1 06 

 Visual cortex 



localization of visual field, 1 100 



motor integration, 812 

 Vocalization 



cortex and, 1357 

 Vomiting 



central control of, 1 167 

 Vomiting reflex 



mediation, 960 



Wakefulness 



see also Arousal; Attention behavior; 

 Instinctive behavior 



prolonged, i 288 



reticular formation and, 1287 

 Wakefulness and sleep, 971, 1287, 1288 

 Wallerian degeneration 



preganglionic fibers, 995 

 Water deprivation 



supraoptic nucleus, paraventricular 

 nucleus and, 1049 

 Water intake 



see also Thirst 



regulation of, 1200 

 Weight discrimination 



loss, 816 



sensorimotor integration, 814 

 Wilson's disease 



lesions in, 875 



