. The practice of medicine; a text-book for practitioners and students, with special reference to diagnosis and treatment . an investigation we discover the presence of a GENERAL SYMPTOMATOLOGY 839 complete paralysis or total loss of voluntary motion, and paresis or simpleweakening of such power. By a monoplegia is meant an isolated paralysis of one part of the body,as of an arm or a leg. By a hemiplegia is meant a paralysis of the entirelateral half of the body, including half of the face, one arm, and one leg,also known as unilateral paralysis. By a paraplegia is meant a simultaneousparalysi
. The practice of medicine; a text-book for practitioners and students, with special reference to diagnosis and treatment . an investigation we discover the presence of a GENERAL SYMPTOMATOLOGY 839 complete paralysis or total loss of voluntary motion, and paresis or simpleweakening of such power. By a monoplegia is meant an isolated paralysis of one part of the body,as of an arm or a leg. By a hemiplegia is meant a paralysis of the entirelateral half of the body, including half of the face, one arm, and one leg,also known as unilateral paralysis. By a paraplegia is meant a simultaneousparalysis of the upper or lower halves of the body. Paralysis of the two armsis known as a superior, or brachial, paraplegia, of the two legs as an inferior,or crural, paraplegia, while the word paraplegia alone is often used for thelatter condition. A diplegia is a paralysis in which upper and lower limbsare affected on both sides of the body, usually attended with spasm of all theextremities, although the term is also emploj^ed for bilateral facial commonly congenital, diplegia may also be acquired. Jh:irt. Face ?PS/j:. £xtremi/i/ Fig. 135.—-Illustrating Crossed Paralysis—{after Eirt). 0. iledulla oblongata, pyx. Decussation of anterior pyramids. E. Nerve fiber going to extremities. F. Nerve fiber to face. Impairment of voluntary muscidar power, as thus tested, must be theresult of structural change in the motor area of the cortex, in the motortract of the brain or cord, or impairment in the integrity of the efferentnerves, or it may be more rarely in the muscle itself, myopathic palsy;or the power of the will may be abrogated. In diseases of the peripheralner\^es, when the paralysis is called peripheral, it is limited to the region ofdistribution of the affected nerves, whether one or many. It msiy be saidin general that hemiplegia is the usual form of cerebral paralysis, whileparaplegia is the expression of spinal paralysis. Monoplegias are due tolesions of th
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