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CENTER 



Epigastric, the solar plexus. C, Epiotic, the ossi- 

 fication center of the mastoid portion of the temporal 

 bone. C, Excitomotor, the sensitive qenters of the 

 brain considered as one ; these are the crura, the pons, 

 the oblongata, the deeper parts of the cerebellum, and 

 the corpora quadrigemina. C.s, Facial Movement, 

 one in the ascending frontal gyrus and one in the an- 

 gular gyrus controlling facial movements. C, Gen- 

 itospinal. See C, Ejaculation (Illus. Diet.). C, 

 Genitourinary, one in the lumbar portion of the 

 spinal cord controlling erection of the penis and emis- 

 sion of semen. C.s, Glandular. See C, Secretory. 

 C, Glycogenic, the diabetic center. C, Great 

 Nervous or Neural. See C, Neural. C, Half- 

 vision, one in the apex of the occipital lobe receiving 

 impressions from corresponding halves of the two reti- 

 nas. C, Head and Neck Movement, one in the 

 posterior end of the second frontal gyrus and in the 

 corresponding part of the first frontal gyrus controlling 

 the movements of the head and neck. C, Higher 

 Visual, one regarded as lying in the angular gyrus in 

 which there is effected a combination of the impres- 

 sions received from the half-vision centers, making a 

 complete image. C, Hitzig's, a center in the supra- 

 marginal gyrus which is supposed to govern the vol- 

 untary movements of the eyeballs. C.s of Inhibi- 

 tion, C.s, Inhibitory. See C.s of Moderation. C, 

 Insensitive, the less sensitive parts of the brain (cer- 

 tain portions of the cortex, the thalamus and striatum) 

 which respond less readily to stimulation. C, In- 

 spiratory. I. A reflex center in the oblongata forming 

 part of the respiratory center. 2. See C. , Cerebral In- 

 spiratory. 3. A reflex center in the postgeminum. C, 

 Intracardiac, three small nerve-ganglions connected 

 with the cardiac plexus, to which is due the automatic 

 beating of the heart after separation from the body. 

 C, Kinesthetic, one in the third left frontal convolu- 

 tion presiding over the motor element in speech. C, 

 Laryngeal Cortical, one in the posterior end of the 

 inferior frontal gyrus. C, Luys' Median. See 

 Nucleus of Luys (Illus. Diet.). C, Masius'. See 

 C, Anospinal (Illus. Diet.). C, Median (of Luys). 

 See Nucleus of Luys (Illus. Diet.). C, Medullary. 

 I. The interior white matter of the cerebral hemi- 

 spheres. 2. See C, Neural. C.s of Moderation, 

 C.s, Moderator, nervous centers in the spinal cord and 

 the cerebral peduncle which restrain, generally by reflex 

 action, various functions of the body. C, Motor, 

 a nervous center controlling motion. C, Musculo- 

 tonic, that which is continually discharging impulses 

 which keep the muscular system in a condition of 

 slight contraction. It is regarded by some as a special 

 center of the cord, but it is questionable whether this 

 condition is attributable to any special center rather 

 than to the action of all those cells whose function it 

 is to send out motor impulses. [Raymond.] C, 

 Naming, one located in the dorsal part of the third 

 and fourth temporal gyri. C, Nerve, C, Nervous, 

 any group of nerve-cells acting in unison for the per- 

 formance of some function. C., Neural, in the em- 

 bryo that part of the epiblast ultimately developing 

 into the brain and spinal cord. C, Nutrition. See 

 C, Trophic. C, Opisthotic, the center of ossifica- 

 tion of petrous bone. Huxley's name for the part of 

 the periotic cartilage surrounding the fenestra rotunda 

 and the cochlea. C, Oral, one in the cortex, stimu- 

 lation of which in the dog causes opening of the 

 mouth and projection of the tongue. C, Parenchy- 

 matous Nerve-, Korner's name for a nerve-cell ex- 

 isting in the substance of an organ and controlling its 

 action. C, Peristaltic, one in the oblongata con- 

 trolling peristalsis. C, Phonation. SeeC, Laryn- 



geal Cortical. C, Phonetic, C, Phonic, the point 

 of origin of sound produced by any vibrating body. 

 C, Phonocamptic, the part of the auditory apparatus 

 concerned in the reception of reflected sounds. C, 

 Phrenic, the tendinous central part of the diaphragm. 

 C, Polypneic, a cerebral center between the striatum 

 and the thalamus, stimulation of which is said to 

 quicken the respiratory movements. C, Prootic, 

 Huxley's name for the part of the periotic cartilage 

 that invests the superior semicircular canal. C, Psy- 

 choacoustic. See C, Auditory (Illus. Diet.). C, 

 Psychocortical, any one in the cortex regulating 

 mental operations. C, Psychogeusic. See Taste- 

 center (Illus. Diet.). C, Psychomotor, that portion 

 of the cortex from which motor impulses originate. 

 C, Psychooptic. See C, Visual (Illus. Diet.). 

 C, Psychosensorial. See C, Sensory (Illus. Diet.). 

 C, Psychosexual, the hypothetic cortical area con- 

 cerned in sexual desires. C, Psychosmic, the ol- 

 factory center. C, Psychovisive. See C, Visual 

 (Illus. Diet. ). C, Pupil-dilating. 1. See C, Cilio- 

 spinal. 2. An area in the posterior end of the first 

 and second gyri. C.s, Receptive. See under Recep- 

 tive (Illus. Diet.). C, Red (of the tegmentum). 

 See Nucleus tegmenti (Illus. Diet.). C, Reflex, 

 any nerve-cell or group of cells in the brain, cord, 

 or ganglionic system which receives an impression 

 through centripetal nerve-fibers and transforms it into 

 an impulse which is transmitted through centrifugal 

 nerve-fibers. C.s, Secretory. See C, Diabetic; C, 

 Sweat; C. for Secretion of Saliva (Illus. Diet.). C, 

 Sensitive, a general term for any cerebral area which 

 responds quickly to a stimulus. C, Sensory Corti- 

 cal, a hypothetic area of the cerebral cortex which is 

 concerned in sensory perception. C, Setschenow's, 

 a hypothetic reflex-inhibitory center in the brain ; in 

 the frog it is located in the optic lobes. C, Smell, 

 the olfactory center. C, Sudoral. See C, Sweat 

 (Illus. Diet.). C, Supreme, Spitzka's name for the 

 cortical centers of the brain as a whole. C, Tactile, 

 one for the sense of touch, located by Ferrier in the 

 hippocamp and the gyrus hippocampus. C, Taste. 

 See Taste-center (Illus. Diet.). C, Temperature- 

 regulating. See C, Therinotaxic. C, Thermal 

 Cortical, one discovered in the cerebral cortex of the 

 dog, stimulation of which caused a change in the tem- 

 perature of the opposite limbs. C, Thermoexcito-, 

 C, Thermogenic. I. A hypothetic center of the 

 cord concerned in the changes in bodily temperature. 

 2. The mesial portion of the striatum and the parts 

 directly beneath it. C, Thermopolypneic, one in 

 the cinerea about the third ventricle, transmitting sen- 

 sory impulses to the polypneic center, which in turn 

 excites the respiratory center to throw off heat. C, 

 Thermotaxic, six heat-regulating cerebral centers ; 

 of the four principal centers, one is located in the cau- 

 datum, one in the subjacent cinerea, one in the cinerea 

 surrounding the most anterior portion of the third ven- 

 tricle, and one at the anterior inner extremity of the 

 thalamus. C, Trophic, a nerve-center regulating 

 nutrition. C.s, Vascular, C, Vasoconstrictor, cen- 

 ters in the cord controlling the contractility of the 

 smaller bloodvessels. C, Vital. See. C, Respira- 

 tory, and Point, Vital (Illus. Diet.). C, Vomiting, 

 an area in the oblongata concerned in the reflex act ol 

 vomiting ; stimulation of the terminal filaments of the 

 vagi excites its action. C, Winking, the reflex cen- 

 ter concerned in winking, situated in the oblongata. 

 C.s, Word. 1. One in the left superior temporosphe 

 noiclal gyms controlling the perception of words 

 heard. 2. A center in the posterior part of the left 

 parietal lobe and one in the second left frontal gyrus 



