Nervous and mental diseases . fact, it may disappear before the knee-jerk is lost andconstitutes a valuable early test. The reflexes in the upper extremityfail when the cervical cord is involved, and Fraenkel claims that thetriceps reaction is lost as commonly and as early as the knee-jerk;2 butthis is clearly erroneous. The superficial reflexes, such as the plantar,abdominal, dorsal, and scapular, are variable. The iris reflex to light isusually abolished early, but will be considered later with the disturb-ances of certain other organic reflexes, including those of the cremasters. All muscle
Nervous and mental diseases . fact, it may disappear before the knee-jerk is lost andconstitutes a valuable early test. The reflexes in the upper extremityfail when the cervical cord is involved, and Fraenkel claims that thetriceps reaction is lost as commonly and as early as the knee-jerk;2 butthis is clearly erroneous. The superficial reflexes, such as the plantar,abdominal, dorsal, and scapular, are variable. The iris reflex to light isusually abolished early, but will be considered later with the disturb-ances of certain other organic reflexes, including those of the cremasters. All muscles in the involved areas present a peculiar lack of tonicity,of which the reduced or lost tendon reflexes are a manifestation. This1 Eaymond, Lefons, Paris, 1901. 2 Deutsch. Zeit. f. Nervenh., July, 1900. 436 DISEASES OF THE CORD PROPER. hypotone is readily demonstrated by the ease with which over-extensioncan be imparted to knees, ankles, and elbows, and in the great rangeof flexion at the hip and of abduction of the \ :_?_ ^ — Fig. 188.—Abnormal range of flexion of hip-joint due to hypotonus in tabes. V
Size: 1870px × 1336px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookid, booksubjectnervoussystem
