. Medical and surgical therapy. d ulnar may causea paradoxical extension of thehand when the negative elec-trode is apphed to the antero-inferior part of the forearm,whereas bipolar faradisationcauses flexion. The latterindicates the predominantaction of the extensors, andenables one to detect even a slight weakness of the flexors Fig. 26.—Abnormal graspof the hand (183). Unipolar faradisation of thepostero-superior surface of theforearm causes, on the otherhand, a paradoxical flexion ofthe hand in musculo-spiral paralysis even when the faradic excitabiHty of themusculo-spiral nerve does not a
. Medical and surgical therapy. d ulnar may causea paradoxical extension of thehand when the negative elec-trode is apphed to the antero-inferior part of the forearm,whereas bipolar faradisationcauses flexion. The latterindicates the predominantaction of the extensors, andenables one to detect even a slight weakness of the flexors Fig. 26.—Abnormal graspof the hand (183). Unipolar faradisation of thepostero-superior surface of theforearm causes, on the otherhand, a paradoxical flexion ofthe hand in musculo-spiral paralysis even when the faradic excitabiHty of themusculo-spiral nerve does not appear appreciablyaffected (184). The reason is that as the electricalstimulus is apphed to the median and ulnar at the sametime as the musculo-spiral, the action of the flexors isstronger than that of the extensors. This sign maj^serve to detect an incomplete musculo-spiral palsy,such as may occur from the use of crutches. We may add that Raimistes test for the diagnosisof organic hemiplegia may also be used for the diagnosis. IN A CASE OF LEFT MEDL\N PARALYSIS. Owing to theinability to oppose, thethumb is pusherl againstthe cylinder and does notgrasp it. 608 REFLEX NERVOUS DISORDERS of musculo-spiral paralysis (H. Meige, Froment andHoven). These diagnostic points, in addition to those whichwe have previously described, will always enablehysterical paralysis to be distinguished from paralysisdue to a lesion of a nerve trunk. Diagnosis of Reflex Paralysis from Organic Paralysis Reflex paralyses, with or without contracture, arelocalised in the injured limb, and consequently neverassume the form of hemiplegia or paraplegia, unlessthere are multiple traumata. There is thus a wholeseries of cases in which it is possible to eliminate atonce the hypothesis of reflex paralysis. In thisrespect the diagnosis of reflex paralysis from organicparalysis is easier than that of hysterical paralysis fromorganic paralysis, or at least its field is more limited. But, on the other hand, reflex
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