在感觉损失后,触摸手部空间表示的稳定性
Michelle Giraud1, Luigi Tamè2, Elena Nava1
1Department of Psychology, University of Milano-Bicocca, Piazza dell'Ateneo Nuovo 1, Milano, Italy.
概括
触觉感知扭曲和尺寸恒定性不受长期视觉剥夺的影响. 这表明,大脑的
科学领域:
- 神经科学是一个神经科学.
- 感官感知是一种感官感知.
- 身体的感觉 - - 身体的感觉.
背景情况:
- 在健康个体中,触觉感知表现出身体各部位的扭曲.
- 这些扭曲是可适应的,受视觉体验的影响,并通过皮质再缩放减轻.
- 触觉尺寸恒定性意味着大脑对身体部分尺寸的表示.
研究的目的:
- 调查长期视觉剥夺是否影响触觉尺寸恒定性和身体扭曲.
- 确定视觉输入在触觉空间表示的发展中的作用.
主要方法:
- 在盲人和有视力的个人手和手指上比较触觉距离估计.
- 评估不同视觉体验的参与者对触觉刺激的空间感知.
主要成果:
- 盲人和有视力参与者都在触觉感知中表现出典型的手扭曲.
- 视觉体验没有影响触觉刺激在手上的空间表现.
结论:
- 触觉尺寸常数是一个强大的原则,独立于视觉输入而发展.
- 大脑对触觉刺激的空间表示是稳定的,即使从出生就没有视力.
相关概念视频
01:33Somatosensation
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.
01:11Sensory Perception: Organization of the Somatosensory System
The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...