优化振动性反用于大腿感官置换:空间敏度和频率特征
IEEE transactions on haptics
|June 27, 2025
概括
下肢截肢的个体可以使用假肢中的振动显示器恢复感官反. 在大腿上进行两点区分的最佳空间敏度需要25-30毫米的间距,不受振动频率的影响.
科学领域:
- 生物医学工程 生物医学工程
- 神经科学是一个神经科学.
- 康复科学 康复科学 康复科学
背景情况:
- 下肢截肢显著影响移动性和感官反,增加跌倒风险.
- 通过在假肢插座中的触摸显示器进行感官替代,为截肢者提供人工感觉.
- 有效的感官替代依赖于用户感知不同的振动刺激,受到两点区分能力的限制.
研究的目的:
- 为了确定在大腿上感知明显的振动点的最小距离.
- 为了研究振动频率对转肢截肢者的空间敏度的影响.
- 评估刺激方向 (垂直与水平) 对触觉感知的影响.
主要方法:
- 腿部截肢的参与者在他们的大腿上接受了振动刺激.
- 刺激间距在20-30毫米之间进行,以评估两点歧视值.
- 在感知值的振动频率 (30 Hz 和 150 Hz) 被用来评估空间敏度.
主要成果:
- 需要至少25-30毫米的距离,以获得75%的准确度来感知两个截然不同的振动点.
- 低 (30 Hz) 或高 (150 Hz) 振动频率对空间敏度没有显著的影响.
- 垂直刺激间距被认为比水平间距更准确.
结论:
- 结果确定了有效的振动感官替代在腿假肢中的关键间距参数.
- 振动频率不会阻碍感知值的空间敏度.
- 优化触摸显示设计与垂直刺激方向可以增强截肢者的感官反.
相关概念视频
Sensory Modalities
1.6K
Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
1.6K
Somatosensation
38.6K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
38.6K
Tactile and Chemical Senses
367
Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
367
Design Example
375
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
375


