The sciolism of popular phrenology, scantily supplied with anatomical knowledge, and but little better supplied with clear psychic conceptions, is incapable of commending the science to the esteem of critical observers, and of course incapable of sustaining its reputation against the overwhelming opposition of medical colleges. Thus rejected or at least neglected in the universities, which supply its place with worthless metaphysics, and unsustained before the public,—for the tone of literature is controlled by the universities,—it is not strange that the grand discoveries of Gall are neglected as they are to-day.
The objections to Gall’s discoveries which have been considered sufficient, have generally been the offspring of ignorance and superficial thinking. Thousands of physicians have been misled by professors of anatomy thoroughly ignorant of the subject, who have shown to their own ignorant satisfaction how impossible it was to judge of the development of the brain through the skull. The attacks upon phrenology have been generally remarkable for their logical feebleness. Any one well acquainted with the science and the phenomena in nature, could have made a much more effective attack,—an attack which would have appeared entirely unanswerable; but no such attack has been made.
There has been, however, one valid objection to the discoveries of Gall, which has done much to discredit the whole system. He ascribed to the entire cerebellum the sexual function alone, in doing which he disregarded the facts developed by vivisection. Ample observation has shown his error. The cerebellum is the physiological as the cerebrum is the psychic brain, and a defined central portion of the cerebellum at the median line does exercise, in connection with the summit of the spinal cord, the sexual functions. This has been fully established by pathology, as well as by my own experiments. In this matter Gall is certainly entitled to the credit of approximating the truth, the function being located within the territory assigned it.
The fundamental doctrine, however, which Gall has the immortal honor of establishing, is that the cerebrum is not a homogeneous unitary organ, but a mass of distinct organs, as distinct as the sensitive and motor columns of the spinal cord, and exercising different mental functions. Whatever errors of detail he may have fallen into cannot obscure the glory of the pioneer in the anatomy and psychology of the brain. His anatomical doctrines have stood the test of time; they are established; and his psychic doctrines are as near an approach to absolute truth as ever was made by a pioneer in a wilderness of mystery. Gall himself, with the just self-respect which belongs to a sincere and fearless seeker of scientific truth, expressed his attitude as follows, at the close of the sixth volume of his works:—
“These views of the qualities and faculties of man are not the fruit of subtile reasonings. They bear not the impress of the age in which they originate, and will not wear out with it. They are the result of numberless observations, and will be immutable and eternal like the facts that have been observed, and the fundamental powers which those facts force us to admit. They are not only founded on principles deduced from individual facts, but are confirmed by each individual fact in particular, and will forever come off triumphant from every test to which they may be submitted, whether of analysis or synthesis. If the reasonings of metaphysicians are ever discarded, this philosophy of the human qualities and faculties will be the foundation of all philosophy in time to come.”
These are the words of a grand-souled philosopher, who knew that he was speaking the truth, and forcing, as if at the point of the bayonet, a great, new truth upon the stolidity of the colleges. The simple truth of fibrous structure in the brain, now known to every tyro in anatomy, was contested in the days of Gall and Spurzheim, and had to be enforced by public dissection in an Edinburgh amphitheatre. With the same unreasoning stolidity the doctrine of the multiplicity of organs in the brain was shunned, evaded, or denied, though it would seem idiotic for any physiologist to assume such a position (by suppressing his own common sense) when the aim of all modern investigations of the brain is to discover different functions in different parts.
The great doctrine of the multiplicity of cerebral organs, introduced by Gall, could not be suppressed or ignored among those who investigate the brain in any manner. All modern investigators tacitly recognize it, for none could so stultify themselves as to assume the brain to be a homogeneous unit in either structure or functions, while seeking to discover the peculiar functions of each part. Thus his fundamental ideas are adopted by his opponents, and step by step they will be compelled to admit his general correctness, and his grand services as the pioneer in the highest department of science, the most prolific in important results to mankind. “Every honest and erudite anatomist,” says Sir Samuel Solly in his standard work on the anatomy of the brain, “must acknowledge that we are indebted mainly to Gall and Spurzheim for the improvements which have been made in our mode of studying the brain. For my own part, I most cheerfully acknowledge that the interest which I derived from the lectures of Dr. Spurzheim at St. Thomas’ Hospital about the years 1822 and 1823, has been the inciting cause of all the labor which for above twenty years I have at intervals devoted to this subject.”
The organ of language, his first discovery, located at the junction of the front and middle lobes, has been the first to receive the general recognition of the medical profession, because it is easy to recognize its failures in disease, and the morbid condition of its organ.
Its general recognition by physiologists now is not usually accompanied by any reference to Gall as its discoverer. They are probably not aware that he located it correctly, because he referred so much to its external sign in the prominence of the eyes. This prominence of the eyes indicates development of the brain at the back of their sockets. The external marking of organs is to indicate where they lie and in what direction their development produces exterior projection. The junction of the front and middle lobes, including the so-called “island of Reil” (who was a pupil of Gall, and spoke of him as the most wonderful of anatomists), has its most direct external indication at the outer angle of the eye. That is the location which has been given the organ by my experiments, which were made without reference to anatomy, without even a thought of it, for I consider such experiments the supreme authority in physiology, and do not stop to inquire whether any previous knowledge supports them or not.
Dr. Gall had the true idea, for although he spoke of the general prominence of the eye as the indication, he also recognized the development as extending in the direction in which I have located it. He regarded the organ of language as a convolution lying on the super-orbital plate, behind the position of the eyeball. This convolution is comparatively defective in animals generally, but more developed in birds of superior vocal powers. In addition to this, he observed the growth extending into the temples, where the front and middle lobes unite. “A great diameter in this direction,” he says, “is always a favorable augury for the memory of words. I have seen persons who with an ordinary conformation of the eyes yet learned by heart with great facility. But in these cases the diameter from one temple to the other is ordinarily very considerable, and sometimes even the inferior part of the temples is projecting, which attests a great development of the adjacent cerebral parts.”