بستگان درجه اول بدون تغییرات موارد لرزهای ضروری دارای اختلال بیشتری نسبت به افراد کنترل شده با سن دارند

FD-ET reported more near-falls in the past year and a reduction in balance confidence; additionally, ability to maintain tandem stance was impaired compared to Co. These data suggest a more pervasive abnormality of cerebellar dysfunction than previously conceived, extending beyond ET cases themselves and manifesting in mild form in their unaffected family members.