NOTES.
NOTE I.
Anatomical Relations supposed by Gall to exist between the Organs of the External Senses, and the Organs of the Intellectual Faculties.
[Page 82.] According to Gall, the origin, the development, the structure and mode of termination, as to the organs of the faculties of the soul and the organs of the external senses, every thing is similar, every thing is in common.
It is known that two substances compose the nervous system—the gray matter, and the white or fibrous matter. Well, according to Gall, one of these substances produces the other. The gray matter produces the white matter.
Wherever, therefore, there happens to be any gray matter, white matter must appear; that is to say, nervous fibres,[184] nervous filaments, nerves. All the nerves in the body must arise in this way. The spinal nerves arise from the gray matter which is in the interior of the spinal marrow; the cerebral nerves from the gray matter that is in the interior of the medulla oblongata.
Hence, the nerves of the body are organs of the senses.
On the other hand, the brain and the cerebellum,[185] which are the organs of the faculties of the soul, must arise like the nerves: the brain from the gray matter of the pyramidal eminences; the cerebellum from the gray matter that surrounds the restiform bodies.