脚的厚度不会在行走时为触觉敏感性提供保护
Nicholas B Holowka1, Bert Wynands2, Tina J Drechsel2
1Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, USA.
Nature
|June 28, 2019
概括
不同于带子的鞋子, 裸脚行走会使脚变厚, 这种进化适应在各种地形上保持安全和感官反.
科学领域:
- 人类的进化
- 生物力学
- 皮肤病学
背景情况:
- 人类在历史上赤脚行走,
- 现代鞋类,尤其是带的鞋类, 是相对最近才出现的.
- 是进化过程中保护脚免受环境危害的反应.
研究的目的:
- 调查脚与鞋子在行走过程中保持触觉敏感性的区别.
- 将的保护性质和感官反与鞋类进行比较.
- 评估和缓冲鞋对地面冲击力的影响.
主要方法:
- 比较肯尼亚和美国的赤脚步行者与鞋履使用者的厚度,硬度和硬度.
- 在行走过程中测量各种频率的触觉灵敏度.
- 在行走过程中分析冲击力和负载率.
主要成果:
- 裸足者比使用鞋子的人有更厚,更硬的.
- 不同于降低触觉敏感度的鞋子,
- 的厚度不会改变地面冲击力,而缓冲鞋则会改变.
结论:
- 足上的提供了保护和舒适,
- 舒适的鞋子会降低触觉灵敏度,改变冲击力学,并可能对骨产生长期影响.
- 与一些现代鞋类相比, 足部的自然适应提供了更好的感觉反和保护.
相关概念视频
Muscles of the Leg that Move the Foot and Toes
4.0K
The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
Anterior Compartment
The anterior compartment includes muscles that contribute to the dorsiflexion of the foot. This compartment houses the tibialis anterior, extensor hallucis longus, and extensor digitorum longus muscles....
Anterior Compartment
The anterior compartment includes muscles that contribute to the dorsiflexion of the foot. This compartment houses the tibialis anterior, extensor hallucis longus, and extensor digitorum longus muscles....
4.0K
Tactile and Chemical Senses
732
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.
732
Zones of Protection
770
In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
770
Protection of Alcohols
8.0K
This lesson delves into the concept of protection and deprotection of a functional group fundamental to synthetic organic chemistry. These phenomena are explained in the context of aliphatic and aromatic alcohols.
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
8.0K
Protecting Self-Esteem
201
Self-esteem, a central component of psychological well-being, is actively maintained through various cognitive and behavioral strategies. Individuals employ specific mechanisms to preserve a positive self-concept and mitigate threats to their self-worth, particularly in contexts involving social evaluation or personal feedback. Four primary techniques are commonly used to sustain self-esteem.Manipulating AppraisalsOne prominent strategy involves manipulating appraisals from others. Individuals...
201
Radial System Protection
425
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
425


