鼠的表面按摩器在咬咬过程中运行在很长的长度
Nicolai Konow1, Brandon Reder2, Daniel Bartlett2
1Department Biological Sciences, University of Massachusetts Lowell, Lowell, MA, 01854, USA. Nicolai_Konow@uml.edu.
Scientific reports
|October 31, 2025
概括
哺乳动物的部肌肉的运作时间比以前想象的要长,尤其是在咬硬食物的时候. 这一发现挑战了现有的模型,并影响了我们对肌力学和进化的理解.
科学领域:
- 生物力学 生物力学
- 哺乳动物生理学哺乳动物生理学
- 骨肌肉研究 骨肌肉研究
背景情况:
- 以前的研究表明,大肌肉在其力-长度曲线上以短的肌肉长度运行.
- 这种共识是基于抽收缩或咬点力测量.
- 已知激活强度可以缩短肌肉的最佳长度 (LO).
研究的目的:
- 为了测试这种假设,LO的老鼠表面质量测试器 (SM) 随着激活强度的下降.
- 为了调查高强度咬伤是否涉及肌肉缩短,从强度-长度曲线上的更长的长度.
- 在体内将肌功能映射到其力-长度关系上.
主要方法:
- 在体内测量肌肉激活,应变和咬过程中的力量,对各种食物硬度进行测量.
- 在现场测量每个肌肉的力-长度关系.
- 将体内数据映射到六个大鼠SM肌肉的体内力-长度曲线上.
主要成果:
- 亚最大LO大约比抽LO短12%.
- 小鼠SM咬伤力平均为4.1 ± 3.9 N/cm2,达到高达10.6 N/cm2.
- 肌肉长度操作范围从LO以下的7%到27%以上,特别是在咬硬食物时.
结论:
- 肌的运作时间比以前认为的要长,长度可能不稳定.
- 这挑战了人们对部肌肉机制和功能的既定理解.
- 这些发现对面进化,肌肉力学和肌肉骨健康有广泛的影响.
相关概念视频
01:14Muscles for Facial Expressions
4.6K
The craniofacial muscles are a collection of approximately 20 thin skeletal muscles situated beneath the skin of the face and scalp. These muscles, primarily responsible for the vast array of human facial expressions, originate from the bones or fibrous structures of the skull and extend outwards to connect with the skin. While most skeletal muscles in the body are enveloped in thick fascia, facial muscles generally have a more delicate fascial covering, with the buccinator muscle being a...
4.6K
01:21Tooth Anatomy
2.0K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
2.0K