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目的 了解老年人瞬目反射 (BR)的正常分布及变异。 方法 对 30例 (6 0侧 )老年人及 2 9例 (5 8侧 )非老年人进行瞬目反射的测定并进行比较。 结果 老年组BR早期反应R1的潜伏期为 (10 2 8± 0 39)ms ,波幅为 16 2 88μV ;同侧晚期反应R2 的潜伏期为 (32 86± 2 81)ms,波幅为2 10 72 μV ;对侧晚期反应R2 ’的潜伏期为 (33 33± 2 90 )ms ,波幅为 15 6 32 μV。非老年组R1的潜伏期为 (9 98±± 0 87)ms,波幅为 2 10 2 2 μV ;R2 的潜伏期为 (2 9 5 2± 2 2 4)ms,波幅为 2 2 8 15 μV ;R2 ’的潜伏期为 (2 9 94± 2 2 9)ms ,波幅为 189 5 0 μV。两组比较 ,各波间潜伏期差异均有非常显著性 (均为P <0 0 1)。 结论 BR的测定简便、无创、易行 ,随年龄增长其潜伏期延长 ,应建立老年人的BR正常值。
Objective To understand the normal distribution and variation of blink reflex (BR) in the elderly. Methods Blink reflex was measured and compared in 30 elderly (60 sides) and 29 non-elderly (58 sides). Results The latency of R1 in early BR was (102 8 ± 0 39) ms and the amplitude was 16 2 88 μV. The latency of R2 in late ipsilateral reaction was (32 86 ± 2 81) ms and the amplitude was 2 10 72 μV. R2 ’latency of the contralateral late response was (33 33 ± 2 90) ms with an amplitude of 15 6 32 μV. In non-elderly group, the incubation period of R1 was (998 ± 0 87) ms, the amplitude was 2 10 2 2 μV; the latency of R2 was (2 9 5 ± 2 2 4) ms, the amplitude was 2 2 8 15 μV; R2 ’Had an incubation period of (2994 ± 229) ms with an amplitude of 189 5 0 μV. The differences between the two groups were significant (P <0.01). Conclusion The determination of BR is simple, noninvasive and easy to operate. As the incubation period increases with age, the normal BR of the elderly should be established.