Organic and functional nervous diseases; a text-book of neurology . nless the paral-ysis is bilateral this is not very notice-able. In the act of protruding thetongue the healthy muscles elevate its posterior portion, pushing it outward more fully on the nonparalyzedside; hence the tongue deviates toward the side of the and swallowing are not interfered with by unilateral hypo-glossus paralysis, but are seriously impaired if the paralysis is is difficult to examine the tongue electrically on account of its greatsensitiveness, but it may be possible to demonstrate
Organic and functional nervous diseases; a text-book of neurology . nless the paral-ysis is bilateral this is not very notice-able. In the act of protruding thetongue the healthy muscles elevate its posterior portion, pushing it outward more fully on the nonparalyzedside; hence the tongue deviates toward the side of the and swallowing are not interfered with by unilateral hypo-glossus paralysis, but are seriously impaired if the paralysis is is difficult to examine the tongue electrically on account of its greatsensitiveness, but it may be possible to demonstrate a reaction ofdegeneration in its muscles. Paralysis of the twelfth nerve from disease of its nucleus may beproduced as a part of the lesion of bulbar paralysis. ^ (See p. 616.)When the paralysis is due to an affection of the nuclei of the hypoglossalnerve there is usually some paralysis of the orbicularis oris asso-ciated with the paralysis of the tongue as a few of the fibres fromthat nucleus pass to this muscle. 43 Deut. Zeitsch. f. Nervenheilk., Bd. xiii., Eight hemiatrophy of the tongue.(Scripture.) 674 TEE CBANIAL NEEFES AND TUEIB DISEASES. The cortical centres for the movements of the tongue lie in thelower third of the motor area, and are joined to the nucleus by fibreswhich pass in the motor tract anterior in the capsule and median inthe cms to the tracts for the arm and leg. These fibres decussate inthe raphe of the medulla. Partial paralysis of the tongue with deviation toward the paralyzedside is usually an accompaniment of hemiplegia, but in this case thereis no fibrillary twitching and no atrophy in the tongue. There is no known treatment for this form of atrophic paralysis. A spasmodic contraction of the muscles of the tongue (aphthongia)has been described by Charcot ^ and must have been known in themiddle ages, as the best examples are found copied in stone in someof the gargoyles of the Notre Dame in Paris and other cathedrals inEurope. In this aifection th
Size: 1309px × 1909px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectnervoussystem, bookye
