On the greater increase of the force which, to carry the same load with the same bones, is required from the muscles which are involved in the operation
The fact that the force exerted by the muscles is greater than the supported load thus has been demonstrated. This rightfully appears as surprising. Even more surprising is its increase which we shall now describe after presenting some lemmas of mechanics.
KeywordsIntervertebral Disk Lumbar Vertebra Extensor Muscle Deltoid Muscle Flexor Digitorum Profundus
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