Von Frey纤毛机械刺激钇�/span>（Von Frey hairs test Von Frey Filaments� Semmes-Weinstein monofilament �?0根Von Frey尼龙纤维丝，它可提供0.008g-300g的刺激力可对多种动物进行定量的痛觉测试＋�span>主要用于von Freyhairstest评估皮肤的机械痛阈或触觉阈测野�/span>、�/span>

Von Frey hairs纤毛机械刺激钇�/span>的粗细及伸出长度决定提供刺激力的大小。实验时，根据实际情况选定粗细当得的Von Frey hairs纤毛机械刺激钇�/span>，调节适当Von Frey hairs纤毛机械刺激钇�/span>的伸出长度，垂直地刺激皮肤，可通过调节伸长、更换Von Frey hairs纤毛机械刺激钇�/span>调整刺激力大小，直到Von Frey hairs纤毛机械刺激钇�/span>弯曲。当啮齿类动物得爪受到一个机械刺激，它们会缩回反射。该触觉测试可应用于大、小鼠的足底、�/span>

另外，可选配凿孔工作台，其网筛孔是利用激光切冲而成的方形孔，尺寸为5��5mm2 ，孔间距约为1mm，这对受试动物而言是一个舒适的环境，也便于操作人员观察动物的足底区域。该凿孔台经涂层处理，便于清洁且不易被腐蚀、�/span>

主要技术参数：

Von Frey hairs纤毛机械刺激钇�/span>尼龙丝：no��20，校准偏差小�?%

Von Frey hairs test 刺激力：0.008-300g

Touch Test

The Semmes-Weinstein monofilaments provide an approximate logarithmic scale of actual force� and a linear scale of perceived intensity. They have a long history of effective use in clinical settings� and can be used to diagnose pathologies of hyper- or hypo-aesthesia. Subsets within the set of 20 probes distinguish pathologies on different parts of the body (foot� hand� lip� cheek，etc.).

Semmes-Weinstein Von Frey Aesthesiometer for touch assessment

Features

Set of 20 monofilaments based on the Semmes-Weinstein monofilament set

Features retractable filaments to protect the filament

Allows the researcher to carry a few in a pocket

The Semmes-Weinstein monofilaments provide an approximate logarithmic scale of actual force� and a linear scale of perceived intensity. They have a long history of effective use in clinical settings� and can be used to diagnose pathologies of hyper- or hypo-aesthesia. Subsets within the set of 20 probes distinguish pathologies on different parts of the body (foot� hand� lip� cheek，etc.).

Operating Principle When the tip of a fiber of given length and diameter is pressed against the skin at right angles� the force of application increases as long as the researcher continues to advance the probe� until the fiber bends. After the fiber bends� continued advance creates more bend� but not more force of application. This makes it possible for the researcher using a hand-held probe to apply a reproducible force� within a wide tolerance� to the skin surface.

Pre-Clinical Use Rodents exhibit a paw withdrawal reflex when the paw is unexpectedly touched. The Touch Test? Sensory Evaluator can be used on the Plantar surfaces of the foot of a rat or mouse. The animal indicates sensation by pulling back its paw. Individual filaments available.

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