A letter-recognition task to assess lingual tactile acuity
A letter-recognition task to assess lingual tactile acuity
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DOI：
10.1016/s0278-2391(99)90871-6
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发表时间：
1999-11-01
影响因子：
1.9
通讯作者：
Kelly, DG
中科院分区：
文献类型：
--
作者：
Essick, GK;Chen, CC;Kelly, DG
目的：本研究评估了一种基于字母识别的新型神经感觉测试，用于评估舌头的空间敏锐度。患者和方法：使用上下跟踪程序来估计舌尖检查的字母表浮雕字母识别的阈值高度。 48 个刺激物由丙烯酸条组成，其一侧有一个高度为 3、4、5、6、7 或 8 毫米的字母（A、I、J、L、O、T、U 或 W）。对 20 名神经系统正常的年轻人进行了测试。结果：仅经过 15 次试验就获得了阈值高度的稳定估计。阈值高度平均为 5.1 毫米（范围为 3.7 至 6.6 毫米），并且不受性别影响 (P > .88)。尽管这些字母的正确识别率为 54%，但平均而言，单个字母的有形性从 5% 正确率（W）到 82% 正确率（T）不等。 20 名受试者中有 16 名从未认出字母 W；所有受试者均识别出 T、O 和 UF。错误分析证实受试者依赖空间线索进行区分； 58%的错误反应是针对1或2个与刺激字母空间特征相似的字母。结论：字母识别的阈值高度可以轻松快速地获得，表现出较低的受试者间变异性，反映了提取和处理空间信息的能力。应使用舌头上类似易读的字母来尽量减少对受试者真实敏锐度的低估。
Purpose: This study evaluated a novel neurosensory test based on letter recognition developed for the assessment of spatial acuity of the tongue.Patients and Methods: An up-down tracking procedure was used to estimate the threshold height for the recognition of embossed letters of the alphabet examined by the tongue tip. The 48 stimuli consisted of acrylic strips, one side of which bore a letter (A, I, J, L, O, T, U, or W) of 3, 4, 5, 6, 7, or 8 mm in height. Twenty neurologically normal young adults were tested.Results: Stable estimates of the threshold height were obtained after delivery of only 15 trials. Threshold height averaged 5.1 mm (range, 3.7 to 6.6 mm) and was unaffected by gender (P > .88). Although the letters were identified correctly 54% of the time, on average, the tangibility of individual letters varied from 5% correct (for W) to 82% correct (for T). The letter W was never identified by 16 of 20 subjects; T, O, and UF were identified by all subjects. Analysis of errors confirmed that subjects relied on spatial cues to make the discriminations; 58% of the incorrect responses were made to 1 or 2 letters with spatial features similar to those of the stimulus letter.Conclusions: The threshold height for letter recognition can be obtained easily and rapidly, exhibits low among-subject variability, and reflects the capacity to extract and process spatial information. Letters of similar legibility on the tongue should be used to minimize underestimation of subjects' true acuities.