. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. ice of one port make ooe oau- ezperiment, in often ui^ged in certain circum- be as usually irely different, he other and a »g is jerked up la little difficult stimulation of the chain of n the tendon ; it is safer to ; estroyed or is nerves of the , showing^ that nusoles are all nena (reflexes) lat relating to animal. It is ly aie all in a clear whether influe
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. ice of one port make ooe oau- ezperiment, in often ui^ged in certain circum- be as usually irely different, he other and a »g is jerked up la little difficult stimulation of the chain of n the tendon ; it is safer to ; estroyed or is nerves of the , showing^ that nusoles are all nena (reflexes) lat relating to animal. It is ly aie all in a clear whether influence like lien the nerves Msterior roots iivided or the eidity of the >e, it has been !t is probably d. i-phenomenon if the spinal h them, were leir ftinctions » of the rest r an influence 1 turn do not ly influenced is the oondi- THE SPINAL 477 tion of the muscles referred to, is, we are convinced, the case. To say that it is either entirely automatic or purely reflex, or that the whole of the facts would be covered even by any com- bination of these two processes, would probably be unjustifiable. The influence of the centers over the metabolism of parts is both constant and essential to their well-being ; and in such a case as that now considered it may be that a certain degree of tonus is normal to a healthy muscle in its natural surround- ings in the body. There is now considerable evidence in favor of placing cer- tain oeniers presiding over the lower functions, as micturition, defecation, erection of penis, etc., in the spinal cord of mam- mals, especially its lower partâwhich centers, if they be not automatic, are not reflex in the usual sense; but their considera- tion is betier attempted in connection with the treatment of the physiology of the parts over which they preside. SPBOIAZi OOVntOBBATlOm. Oompantive.âAmong invertebrates there is, of course, no spinal cord, but each segment of the animal is enervated hy a special ganglion (or gang
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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890
