Michael W. Whittle's Gait Analysis. An Introduction PDF

By Michael W. Whittle

ISBN-10: 0750600454

ISBN-13: 9780750600453

An exam of a patient's skill to stroll is applied as an relief to analysis or as an review of therapy. This examine offers a evaluate of the elemental sciences of anatomy and body structure, and the biomechanics of ordinary and pathological gait, emphasizing scientific and clinical research

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However, it would be remiss not to attempt a definition. ' In order to exclude running, we must add '. . ' Unfortunately, this definition excludes some forms of patho- Normal Gait 49 logical gait which are generally regarded as being forms of walking, such as the 'swing-through gait' (see Fig. 20), in which there is an alternate use of two crutches and either one or two legs. It is probably both pointless and unreasonable to attempt to arrive at a definition of walking which will apply to all cases - at least in a single sentence!

The momentum of a moving object is calculated by multiplying its velocity by its mass. A force, applied to the object, will cause it to change its velocity, and hence its momentum. Another way of expressing Newton's Second Law is to say that the force is equal to the rate of change of momentum. Center of gravity Although the mass of any object is distributed throughout every part of it, it is frequently convenient, as far as the effects of force are concerned, to imagine that the whole mass is concentrated at a single point, which is called the center of gravity (C ofG).

F\> the weight of the body above this point, is acting at a perpendicular distance V from the point of loadbearing. The quadriceps tendon is pulling at an oblique angle relative to the vertical, and the moment of force it provides is the product of the tension in the tendon, F 2 , and the perpendicular distance '£>'. It will be noted that the presence of the patella increases the value of b and hence reduces the muscle force needed to produce a given moment of force. For equilibrium, the two moments (Fi x a) and (F 2 x b) must be equal.

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Gait Analysis. An Introduction by Michael W. Whittle


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