概括
研究人员开发了一种1024通道的神经假体,以恢复盲人的视力. 这种脑部植入物使用电刺激来创建人工视觉 (),在子和盲人身上成功测试.
科学领域:
- 神经科学是一个神经科学.
- 生物医学工程 生物医学工程
- 眼科医生 眼科 眼科
背景情况:
- 失明影响全球4000万,需要先进的视力恢复技术.
- 神经假肢为恢复功能视力提供了一个潜在的未来解决方案.
研究的目的:
- 为子视觉皮层开发和验证一种慢性植入的视觉神经假体.
- 研究使用电刺激来引起视觉感知 (素).
主要方法:
- 为视觉皮层开发了一种1024通道的可植入假体.
- 使用电刺激产生烯,并绘制了它们的位置.
- 同时刺激多个电极以创建复杂的感知.
- 开发了半自动的烯映射和校准的电流值.
- 在盲人志愿者身上测试了刺激和校准方法.
主要成果:
- 氨酸的位置与刺激的神经元受体场准确相对应.
- 在V1刺激期间,V4中的活性预测了烯检测.
- 子可以立即识别简单的形状,运动方向和由素形成的字母.
- 在人类志愿者中成功验证了刺激和校准技术.
结论:
- 视觉皮层的电刺激可以引起可识别的视觉感知.
- 开发的神经假肢和校准方法对恢复盲人的视力充满希望.
- 这项技术有可能为盲人提供改善生活的视力恢复.
相关概念视频
01:24Vision
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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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01:26Visual System
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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
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