Ability to distinguish two cutaneous stimuli separated by a brief time interval
Ability to distinguish two cutaneous stimuli separated by a brief time interval
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能够区分短暂时间间隔的两种皮肤刺激
作者：
J. B. Green;C. L. Reese;J. Pegues;F. Elliott
最近对皮肤敏感性的研究强调了感知中的空间因素而不是时间因素。据报道，患有中枢神经系统疾病的患者感知两种同时但空间分离的刺激的能力受损。感知缺陷包括消失，本德将其定义为“当另一种感觉在感官领域的其他地方同时受到刺激而引起另一种感觉时，一种感觉消失或刺激变得难以察觉的过程”。“对连续刺激的辨别局限于感觉场的一个区域，通常不进行测试。为数不多的此类测量之一是临界闪烁融合频率，它反映了区分间隔很短时间的闪光的能力。临界闪烁融合频率据说在脑损伤患者中降低我们决定用一种类似于视觉感知的闪烁融合测试的方法来研究对时间相关皮肤刺激的欣赏。设计了一种程序来测试识别短暂间隔的皮肤刺激的能力。对正常受试者以及各种神经病变患者进行了检查。
RECENT INVESTIGATIONS of cutaneous sensibility have emphasized spatial rather than temporal elements in perception. The ability to perceive two simultaneous but spatially separated stimuli is reported to be impaired in patients with disease of the central nervous system.’ Defects in perception so identified include extinction, which was defined by Bender as a “process in which a sensation disappears or a stimulus becomes imperceptible when another sensation is evoked by simultaneous stimulation elsewhere in the sensory field.”’ The discrimination of successive stimuli confined to one area of a sensory field is not often tested. One of the few such measurements is the critical flicker-fusion frequency which reflects the ability to distinguish flashes of light separated by a brief time interval. The critical flicker-fusion frequency is said to be reduced in patients with cerebral lesions.2 It was decided to investigate the appreciation of temporally related cutaneous stimuli by a method analogous to the flicker-fusion test of visual perception. A procedure was devised to test the ability to identify cutaneous stimuli separated by a brief time interval. Normal subjects as well as patients with a variety of neurologic lesions were examined.