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86 SOME OTHER PASSIVE MOVEMENTS:
The hand on the foot executes the movement, while the other
acts as a guide.
If the hip-joint alone is to be acted upon, the circumduction
need not be so wide in its range ; but should we wish to affect
the knee-joint as well, or if given for the leg in general, then
there must be complete extension at the knee-joint between each
individual rolling.
Rolling at the Ankle-Joint.
The patient’s leg is so placed over the operator’s knee, that
the ankle-joint comes just over it. If now we grasp the malleoli
with one hand, it is clear that we have complete control over the
joint. The second hand makes the rolling, having the position
on the foot shown in fig. 53.
Fig. 53.
Fig. 54 shows where we apply our fingers when passive move-
ments are made at the metacarpo-pJialangeal joints. If, instead
of taking hold of the forefingers by the first i^halanx, we grasped
it by the tip, we would then have two intervening joints
uncommanded, and this would be a great weakness and dis-
advantage.
The number of times these movements must be made, varies
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