http://myexs.ru/wp-content/themes/multiflex-4-10/img/header.gif
http://myexs.ru/wp-content/themes/multiflex-4-10/img/bg30.jpg

Human Leg Model Predicts Ankle Muscle-Tendon Morphology, State, Roles and Energetics in Walking

Дата: Март 17th, 2011 Автор:
+ Показать свойства документа
  • Тип контента: Научная статья
  • Номер документа: 7239
  • Название документа: Human Leg Model Predicts Ankle Muscle-Tendon Morphology, State, Roles and Energetics in Walking
  • Номер (DOI, IBSN, Патент): doi:10.1371/journal.pcbi.1001107
  • Изобретатель/автор: Pavitra Krishnaswamy, Emery N. Brown, Hugh M. Herr
  • Правопреемник/учебное заведение: Massachusetts Institute of Technology, Cambridge, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
  • Дата публикации документа: 2011-03-17
  • Страна опубликовавшая документ: США
  • Язык документа: Английский
  • Наименование изделия: Не заполнено
  • Источник: PLoS Comput Biol
  • Вложения: Да
  • Аналитик: Глаголева Елена

A common feature in biological neuromuscular systems is the redundancy in joint actuation. Understanding how these redundancies are resolved in typical joint movements has been a long-standing problem in biomechanics, neuroscience and prosthetics. Many empirical studies have uncovered neural, mechanical and energetic aspects of how humans resolve these degrees of freedom to actuate leg joints for common tasks like walking. However, a unifying theoretical framework that explains the many independent empirical observations and predicts individual muscle and tendon contributions to joint actuation is yet to be established. Here we develop a computational framework to address how the ankle joint actuation problem is resolved by the neuromuscular system in walking. Our framework is founded upon the proposal that a consideration of both neural control and leg muscle-tendon morphology is critical to obtain predictive, mechanistic insight into individual muscle and tendon contributions to joint actua-tion. We examine kinetic, kinematic and electromyographic data from healthy walking subjects to find that human leg muscle-tendon morphology and neural activations enable a metabolically optimal realization of biological ankle mechanics in walking. This optimal realization corresponds to independent empirical observations of operation and performance of the soleus and gastrocnemius muscles, gives rise to an efficient load-sharing amongst ankle muscle-tendon units and causes soleus and gastrocnemius muscle fibers to take on distinct mechanical roles of force generation and power production at the end of stance phase in walking. The framework outlined here suggests that the dynamical interplay between leg structure and neural control may be key to the high walking economy of humans, and has implications as a means to obtain insight into empirically inaccessible features of individual muscle and tendons in biomechanical tasks.

Категория: Научные статьи | Нет комментариев »

Комментарии

Добавить комментарий

Ваш e-mail не будет опубликован. Обязательные поля помечены *


Статистика

Категорий: 179
Статей всего: 2,003
По типу:
 Видео: 36
 Выдержка с форума: 1
 Контактные данные: 12
 Научная статья: 1388
 Не заполнено: 5
 Новостная статья: 317
 Обзор технологии: 42
 Патент: 219
 Тех.подробности: 34
 Тип: 1
Комментариев: 6,627
Изображений: 3,005
Подробней...

ТОР 10 аналитиков

    Глаголева Елена - 591
    Дмитрий Соловьев - 459
    Helix - 218
    Ридна Украина))) - 85
    Наталья Черкасова - 81
    max-orduan - 29
    Елена Токай - 15
    Роман Михайлов - 9
    Мансур Жигануров - 4
    Дуванова Татьяна - 3

Календарь

  • Март 2011
    Пн Вт Ср Чт Пт Сб Вс
    « Фев   Апр »
     123456
    78910111213
    14151617181920
    21222324252627
    28293031  
  • Авторизация

    Ошибка в тексте?

    Выдели её мышкой!

    И нажми Ctrl+Enter