Abstract

The present study is an attempt to correlate the symptoms and signs of the pyramidal tract syndrome with the Babinski reflex. A destructive upper motor neuron lesion involving the pyramidal bundle has been said traditionally to produce the following abnormalities: paralysis of the spastic type; hyperactive tendon reflexes; loss of the superficial abdominal and cremasteric reflexes; appearance of certain pathologic reflexes among which is the extensor toe sign of Babinski, and, finally, absence of the reaction of degeneration in the peripheral nerves. Paralysis, the most important feature of the syndrome, is defined as loss of the power of movement. Evidence is accumulating that the Babinski sign can be elicited by general suppression or inhibition of somatic nerve activity. If the pyramidal tract is entirely involved in the mechanism of production of this extensor toe sign, one can be more specific and say that possibly a physiologic block of nervous energy

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