A Text-Book for Training Schools for Nurses, Including Physiology and Hygiene and the Principles and Practice of NursingPaperback
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- Publisher: Rarebooksclub.com
- Format: Paperback | 56 pages
- Dimensions: 189mm x 246mm x 3mm | 118g
- Publication date: 1 March 2012
- Publication City/Country: Miami Fl
- ISBN 10: 1130065359
- ISBN 13: 9781130065350
- Illustrations note: black & white illustrations
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 Excerpt: ...the brain. The sensory nerve fibres are independent of each other, and if a fibre is irritated in any part of its path to the centre, it refers to its ending. A familiar example of this is in limbs that have been amputated. Irritation of the ends of the nerves at the stump will feel as if the fingers or toes were irritated. Another example is striking the ulnar nerve at the elbow (crazy-bone), which causes a tingling of the ring and little finger. The motor nerve fibres carry a force, which we do not yet understand, from where it is generated in the nerve centres outward to the muscles, which causes them to contract. If the nerve to any part is cut in two, the muscle is said to be paralyzed and will not act; but if a current of electricity is passed through the external part of the cut nerve, it causes the muscles to contract. The nerve fibres are independent of each other and only act upon the part they supply. There is no apparent difference between a sensory and a motor nerve fibre, but their functions are always distinct. A sensory nerve will never conduct an im pulse outward, or a motor nerve will never carry an impulse toward the brain. Both classes of fibres are carried side by side in the same nerve sheath. The nerve current is very rapid. The rate in the human subject is estimated to be in feet a second. This varies, however, in different persons and in different states of the body. The expression "to act quickly " has a physiological meaning, and persons differ very much in the time occupied to perform an action after a given signal. In some forms of brain and nerve disease, the nerve impulses become very slow. The sympathetic nervous system, like the cerebrospinal, is composed of centres, or ganglia, and nerves. The ganglia contain nerv...