1naresh
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Mean or % SD No. of Patients Age at MR imaging 68 years 5.5 17 Age at tremor onset 58.3 years 3.9 15 Age at ataxia onset 61.6 years 5.6 15 Significant impairment Writing 89% 17 Walking 50% 17 Tremor 89% 17 Character of tremor Kinetic > postural 100% 15 Discrete resting tremor 58% 15 Gait ataxia 89% 17 Dyssynergia 72% 17 Tone, mild increase 47% 14 Neuropsychologic data VIQ 98 16 6 PIQ 83 17 6 FSIQ 91 18 6 Executive function deficits 100% 6 VIQ < 85 33% 6 PIQ < 85 66% 6 Impotence 100% 6 CGG repeat 86 10 17 FMRP level 77.5%* 9% 6 mRNA level 2.53-fold† 0.48 6
* Percentage of lymphocytes that are positive for fragile X mental retardation 1 protein immuno-cytochemical staining for fragile X mental retardation 1 protein (19,46).
† 2.53-fold increase over normal (16,46).
Note.—VIQ indicates verbal intelligence quotient; PIQ, performance intelligence level; FSIQ, full scale intelligence quotient; FMRP, fragile X mental retardation 1 protein; mRNA, messenger RNA.