Previous to his time, the most confused notions prevailed as to the
functions of the nerves, and this branch of study was little more
advanced than it had been in the times of Democritus and Anaxagoras
three thousand years before. Sir Charles Bell, in the valuable
series of papers the publication of which was commenced in 1821,
took an entirely original view of the subject, based upon a long
series of careful, accurate, and oft-repeated experiments.
Elaborately tracing the development of the nervous system up from
the lowest order of animated being, to man--the lord of the animal
kingdom,--he displayed it, to use his own words, "as plainly as if
it were written in our mother-tongue." His discovery consisted in
the fact, that the spinal nerves are double in their function, and
arise by double roots from the spinal marrow,--volition being
conveyed by that part of the nerves springing from the one root,
and sensation by the other. The subject occupied the mind of Sir
Charles Bell for a period of forty years, when, in 1840, he laid
his last paper before the Royal Society. As in the cases of Harvey
and Jenner, when he had lived down the ridicule and opposition with
which his views were first received, and their truth came to be
recognised, numerous claims for priority in making the discovery
were set up at home and abroad.
Pages:
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210