Archive image from page 552 of Discovery Discovery discovery0102londuoft Year: DISCOVERY 155 be borno upon the limb. The side-bars are of just such a length that when the man sits on the upper end, a [Reproduced by permission of the Oxford Medical Publications.) small part (or none if desired) of his weight is trans- mitted through his own leg to the heel of the boot, and the splint prevents any shortening of the limb. Transmitted pressure, thus provided, is found to exert a very beneficial effect on the rate of bone-repair : for even a healthy bone becomes fragile if it is not permitted
Archive image from page 552 of Discovery Discovery discovery0102londuoft Year: DISCOVERY 155 be borno upon the limb. The side-bars are of just such a length that when the man sits on the upper end, a [Reproduced by permission of the Oxford Medical Publications.) small part (or none if desired) of his weight is trans- mitted through his own leg to the heel of the boot, and the splint prevents any shortening of the limb. Transmitted pressure, thus provided, is found to exert a very beneficial effect on the rate of bone-repair : for even a healthy bone becomes fragile if it is not permitted to withstand the stresses for which it is constructed. Elmslic in London, and more fecently Els of Bonn, have published cases in which bonc-graft> have themselves grown to a much larger size from the effect of transmitted It is of advantage, then, to the fractured bone, as well as a convenience to the patient, that he should get about at an early datr in a caliper spUnt. It is of great use for similar reasons—the partial maintenance of natural function- —in other conditions besides fractures. The treatment of limbs after injury to nerves ha- fallen within the scope of the orthopaedic surgeon on account of the deformities which follow the consequent ' See reference No. 3 at end of article, 2 Bond, of Leicester, and Huntingdon, of California, published the first cases in 1905. » See Fig 3. unbalanced muscular forces,' and on account of the need for special treatment to the muscles put out of action by nerve injur}'. Apart from repair of the nerve, a grave problem is presented by the injury inflicted on a muscle by complete loss of activity, the wasting of muscles being in these cases extreme. Nor was it (till recently perhaps) a simple matter to cir- cumvent this secondary effect of nerve injury. Muscles which have been cut off from the central nervous system show a series of changes which has been known as the ' reaction of degeneration,' a change which, it h
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