Licence: Public Domain Mark
Credit: Documents and dates of modern discoveries in the nervous system. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
169/192 page 153
![THESE MOTIONS SOMETIMES SENSITIVE AND ALWAYS INVOLUNTARY ; partial return to the DOCTRINE OF WHYTT.* BY J. MULLER, M.D. Date of Publication— 1833. [From the “Manual of Physiology ” it would be use- less to make any long extract, seeing that it is in the hands of every student, or ought to be so, even if he had no other book on the subject. No more, there- fore, is here quoted from it than is necessary to express the general character of its doctrine on this subject as given by the author himself, and to permit a very brief comparison of it with those which have preceded.] When impressions made by the action of ex- ternal STIMULI ON SENSITIVE NERVES GIVE RISE TO MOTIONS IN OTHER PARTS, THESE ARE NEVER THE RESULT OF THE DIRECT RE-ACTION OF THE SEN- SITIVE AND MOTOR FIBRES OF THE NERVES ON EACH OTHER ; THE IRRITATION IS CONVEYED BY THE SENSITIVE FIBRES TO THE BRAIN AND SPINAL CORD, AND IS BY THESE COMMUNICATED TO THE MOTOR FIBRES. The view which I take of the matter is the follow- * The precise extent to which this takes place appears from the 1st paragraph here printed in small capitals. It indeed scarcely differs from the last paragraph quoted from Whytt in page 121.](https://iiif.wellcomecollection.org/image/b21721804_0169.jp2/full/800%2C/0/default.jpg)
