在视觉指导下行走时的后壁皮层活动:初步研究
Paul McDonnell1, Adam B Grimmitt2, Jonaz Moreno Jaramillo2
1Movement Neuroscience Laboratory, Department of Kinesiology, University of Massachusetts Amherst, 30 Eastman Lane, Amherst, MA, 01003, USA.
Experimental brain research
|August 25, 2025
概括
在视觉引导步行过程中,后壁皮层 (PPC) 的活动增加,这表明它在视觉空间处理中发挥了安全的作用. 在视觉指导的步行过程中,PPC活动与步行时间的变化相关.
科学领域:
- 神经科学
- 生物力学
- 人类运动科学
背景情况:
- 安全步行依赖于视觉引导 (VC) 步骤调整以导航环境.
- 后壁皮质 (PPC) 对于视觉空间处理至关重要,但其在人类步行中的作用尚未完全理解.
- 皮层控制步态,特别是在视觉复杂的环境中,影响步态变化和跌倒风险,特别是在老年人中.
研究的目的:
- 在视觉指导 (VC) 步行和扰乱 (VCP) 步行期间调查后壁皮层 (PPC) 活动.
- 在不同的视觉指导条件下检查PPC活动与步态变化的关系.
主要方法:
- 21名健康的年轻人参加了三种条件下的跑步机步行:非 (NC),VC步行和VC步行.
- 功能近红外光谱 (fNIRS) 测量了PPC中氧化血红蛋白 (ΔHbO2) 的相对变化.
- 惯性测量单位 (IMU) 量化了步态的变化.
主要成果:
- 从NC到VC和VCP步态均观察到PPC ΔHbO2的适度增加,这表明视觉空间处理需求增加.
- 在VC步行过程中,步行时间的变化与PPC ΔHbO2正相关.
- 这些发现表明,PPC在视觉引导的运动过程中参与调节时间步行特征.
结论:
- PPC在视觉引导步态调整所需的视觉空间处理中发挥作用.
- PPC活动与步态变化有关,可能影响步态适应性.
- 需要对老年人进行进一步的研究,以了解PPC在与年龄相关的步态变化和跌倒风险中的作用.
相关概念视频
01:24Somatosensory, Motor, and Association Cortex
908
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
908
01:14Motor and Sensory Areas of the Cortex
4.6K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
4.6K