'438 



HANDBOOK OF PHYSIOLOGY 



NEUROPHYSIOLOGY II 



Superficial reflexes : see Reflexes 

 Suppression 



areas for, 897, 1294, 1351 



characterization, 812 



relation to spreading depression, 813, 



■351 



reticular formation and, '293 

 Supraopticohypophyseal tract 



see also Pituitary stalk 



neurohypophysial hormones, 1052 



neurosecretory material, 1 030 

 Supraoptic nucleus 



see aho Hypothalamus 



neurosecretion by, 1 042 



water deprivation and, 1 049 

 Swallowing 



cardiac and respiratory changes, 959 



central control of, 959, 1 1 65 



reflex mediation, 960 



respiratory protective reflexes, 1 1 25 

 Sweating 



body temperature control, 1 185 



hypothalamic thermal stimulation, 

 1 186 

 Sweat glands 



denervation and, 993 

 Sydenham's chorea 



lesions in, 875 

 Sympathetic nervous system 



see also Autonomic nervous system 



homeostasis and, 1000 



organization, 980 



transmitter in, 979 

 Sympathetic vasoconstrictor nerves 



cardiovascular control, 1 1 32 



chemical transmission, 1133, 11 36 

 Sympathetic vasodilator nerves 



central representation, 1151 



coronary vessels, 1 1 35 



hypothalamus and, 1 153 



in skeletal muscles, 1 1 35 



intestines, 1 1 36 



medulla oblongata and, 1 152 



mesencephalon, 1152 



pathways, schematic drawing, 1151 



physiologic significance, 11 54 



poststimulator inhibition and, 1 136 



skin and, 1 136 



spinal cord and, 1 152 

 Sympathetic vasomotor pathways 



diagram, 1 132 

 Synapse neurosecretoire 



definition, 1039 



Tactile placing reaction 



cortical ablation and, 791 



instinctive grasp reaction and, 791 

 Tegmental reaction 



nucleus ruber and, 888 

 Teleokinetic mechanisms 



definition, 890, 903 



description, 922 



model of, 904 



statokinetic regulation, 902 

 Tendon organs 



posture and, 1069, 1070 

 Temporal pole cortex: see Orbitoinsulo- 



temporal cortex 

 Testes 



activity after hypophysectomy, 1016 

 Thalainic animal 



arousal in, 1288 



body temperature control, 1 178 



description, 789 



feeding behavior, 1 202 



integrated kinetic behavior and, 787 



lesions simulating in man, 790 



locomotion in, 1084 



panting in, 1 181 



rebound, 788 



sex behavior, 1230 



traction reaction, 789 

 Thalamic nuclei 



see also Centrum medianum 



diffuse projection movements and, 828 



grasping and avoiding responses, 792 



intralaminar, voluntary movements 

 and, 825 



of extrapyramidal system, 881 



projections from, 882 



reticular formation and, 1283 



stiiTiulation in man, 882-884 

 Thalamic recruiting system : see Unspecific 



thalamic projection system 

 Thalamic reticular system: see Unspecilic 



thalamocortical projection system 

 Thalamus 



see also Unspecific thalamic projection 

 system 



afferents to cortex and sensorimotor 

 integration, 814 



competition between projection sys- 

 tems, 1 3 1 1 



connections 



with hippocampus, 1377 

 with hypothalamus, 964 



cortical relations, unspecific, 1307-131 9 



frontal intrinsic system and, 1 326 



projection systems, interrelations, 1315 



projections to cortex, 1 326 



reflex pattern, areas 4 and 6 and, 896 



reticular formation and, 1 283, 1 284 



stria terminalis, connections with hypfi- 

 thalamus, 964 



unspecific cortical relations, 1307-1319 

 Thermal receptors 



see also Thermodetectors 



location, 1 173 

 Thermodetectors 



activation of, 1 177 



body water movements, 1 190 



generator potential, 1177, 1178 



of anterior hypothalamus, 1 1 74, 1 175 



projection to reticular formation, 1 188 



steady potential field, 1 177, 1 178 

 Thermoregulatory eflfector systems 



for body temperature control, 1174- 

 1181 

 Thirst 



discrimination of, 1 198 



hypothalamus and, 1 204 



neurosecretory material and, 1048 



sensation as a guide to drinking, 1 197 

 Thyroid 



activity after hypophysectomy, 1016 

 Thyrotrophic hormone secretion 



central ner\'Ous system effects, 1 008 



control of, 1020, 1023 



external environment and, 1008 



hypothalamic lesions and, 1023 



hypothalamic stimulation and, 1025 



pituitary stalk section, 1020, 1021 



transplantation, 1020, 1021 

 Thyroxin 



body temperature control and, 1 189 



eff^ect on thyrotrophic hormone secre- 

 tion, 1021 

 Tonic labyrinthine reflexes 



decerebrate rigidity and, 786 

 Tonic neck reflexes 



see also Postural reflexes; Righting re- 

 flexes; Labyrinthine reflexes 



decerebrate rigidity and, 786 



eye movements and, 1097 



pyramidotomy and, 839 

 Traction reaction 



description, 790 

 Traction response: see Grasp reflex; 

 Instinctive grasp reaction; Instinc- 

 tive tactile grasping reaction 

 Transcortical reflex 



critique, 1332 

 Transcortical release 



definition, 792 

 Transmitter substances 



autonomic nervous system and, 979 



cardiac vagus and, 1 138 



increased sensitivity to, 993 



\asomotor nerves and, 1 1 33, 1 1 36, 1 1 38 

 Tremor 



see also Parkinsonism 



cerebral-cerebellar interrelations and, 

 816 



description, 907, 1266 



extrapyramidal motor system and, 

 1298 



pyramidal tract and, 1 298 



reticular formation and, 1 298 

 Trigeminal nerve 



respiratory protective reflexes, 1 1 25 

 Tuber cinereum 



neurosection in, 1056 



Uncus 



stimulation of, 1391 

 Unspecific thalamic projection system, 



i307-'3i9 

 see also Thalamus 

 caudate nucleus and, 1313 



