Hygiene of the brain and nerves and the cure of nervousness : with twenty-eight original letters from leading thinkers and writers concerning their physical and intellectual habits / by M. L. Holbrook.

  • Holbrook, M. L. (Martin Luther), 1831-1902.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Hygiene of the brain and nerves and the cure of nervousness : with twenty-eight original letters from leading thinkers and writers concerning their physical and intellectual habits / by M. L. Holbrook. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    mon nerve, passing out at the spinal canal by a passage-way through the vertebra. Any one may examine the passage for himself by taking one of the vertebral bones of an animal, and studying it. The two roots after they have united in one possess both motor and sensory power. As soon as a nerve has passed out of the bony cavity that held it in close confinement and gave it protection, it divides into two branches; one branch is dis- tributed on the front of the body and the other on the back. The branch which supplies the front of the body also supplies the limbs, and is much larger than the other one. These thirty- one pairs of nerves are called the spinal nerves. Eight pairs are given off from the cervical or neck portion of the spinal column, twelve from the dorsal, and five from the lumbar, five from the sacral and one from the coccygeal. The nerves of the cervical region supply the muscles and skin of the neck and arms. The dorsal supply the back, chest and abdomen, and the lumbar nerves supply the lumbar region, and they all have a union with another nervous system not yet mentioned—the sympathetic nerves—which will form the subject of a future chapter. Besides the spinal nerves there are nine other