. A manual of diseases of the nervous system. mbs has been found normal in several cases in which• Charcot, Prog. Med., 1887, No. 23. 522 SriNAL CORD. it lias been examined. The electro-sensibility of tbe muscles is saidto be sometimes lessened. Increased sensitiveness to pain is occa-sionally met witli. Reflex action from tbe sole is usually preserved,but may be lost wben there is ansesthesia. The cremaster reflex iaoften lost. On account of the age of the patients little is known ofthe condition of sexual power, but it is certainly often xisually becomes irregular and cea
. A manual of diseases of the nervous system. mbs has been found normal in several cases in which• Charcot, Prog. Med., 1887, No. 23. 522 SriNAL CORD. it lias been examined. The electro-sensibility of tbe muscles is saidto be sometimes lessened. Increased sensitiveness to pain is occa-sionally met witli. Reflex action from tbe sole is usually preserved,but may be lost wben there is ansesthesia. The cremaster reflex iaoften lost. On account of the age of the patients little is known ofthe condition of sexual power, but it is certainly often xisually becomes irregular and ceases. The sphincters,as a rule, are unaffected. There is no tendency to trophic changes inthe skin or joints. Although muscular power is commonly normal at first, and may benormal even when the ataxy is considerable, it usually becomes impairedas the disease progresses, and sometimes weakness comes on, with theataxy, at the onset of the disease. The loss of power is alwayagreatest in the legs, and may be confined to them. The flexors suffer. Yl&. 138.—Showing a condition of marked lateral curvature inFriedreichs ataxy. more than the extensors, and the weakness in the flexors of the anklemay permit some degree of talipes to occur. The loss of power maybe ultimately great, although it rarely amounts to absolute wasting of the muscles may occur in the later stages of the HEREDITAEY ATAXY 523 disease, attended witli onlv trifling depression of tlie electrical con-tractility ; in two recorded eases, however, a brother and sister, therewas great atrophy of mnscles with altered electrical reactions.*Tiateral curvature of the spine, and talipes equinus or equino-varnsof the feet (see Figs. 138 and 139.), are common as later results of the
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