Mechanical Stress, Functional Adaptation and the Variation Structure of the Human Femur Diaphysis
According to the classical theory of functional structure of bone which was developed by J. Wolff (1884, 1892) and W. Roux (1895) following the investigations of the functional architecture of the substantia spongiosa by H. von Meyer (1867), bone is "functionally" laid down in gross form as well as in minute architecture in accordance with the "maximum-minimum-law". As a result of functional adaptation, a maximum of efficiency is achieved with a minimum of material (Kummer, 1962a). In this sense functional adaptation is a reaction of adaptation of the idiotype-within the bounds of the reaction norm-to a changed internal environment, that is in this case an adaptation to changed mechanical stresses. 1. The Formation of the Normal Femur Shape The heredity basis of shape characteristics of human femora is really unknown. Identical twins show a significant lower variability of length of femur than binovular twins. Population variability of length of femur due to heritability may exceed twice the variability due to environmental factors (Knussmann, 1968). A significant part of the total variation of femur shape characteristics remains therefore unexplained supposing that the sources of variation due to heritability and environmental factors are also nearly the same for the other traits.
1000907327
Mechanical Stress, Functional Adaptation and the Variation Structure of the Human Femur Diaphysis
According to the classical theory of functional structure of bone which was developed by J. Wolff (1884, 1892) and W. Roux (1895) following the investigations of the functional architecture of the substantia spongiosa by H. von Meyer (1867), bone is "functionally" laid down in gross form as well as in minute architecture in accordance with the "maximum-minimum-law". As a result of functional adaptation, a maximum of efficiency is achieved with a minimum of material (Kummer, 1962a). In this sense functional adaptation is a reaction of adaptation of the idiotype-within the bounds of the reaction norm-to a changed internal environment, that is in this case an adaptation to changed mechanical stresses. 1. The Formation of the Normal Femur Shape The heredity basis of shape characteristics of human femora is really unknown. Identical twins show a significant lower variability of length of femur than binovular twins. Population variability of length of femur due to heritability may exceed twice the variability due to environmental factors (Knussmann, 1968). A significant part of the total variation of femur shape characteristics remains therefore unexplained supposing that the sources of variation due to heritability and environmental factors are also nearly the same for the other traits.
109.99 In Stock
Mechanical Stress, Functional Adaptation and the Variation Structure of the Human Femur Diaphysis

Mechanical Stress, Functional Adaptation and the Variation Structure of the Human Femur Diaphysis

by E. Amtmann
Mechanical Stress, Functional Adaptation and the Variation Structure of the Human Femur Diaphysis

Mechanical Stress, Functional Adaptation and the Variation Structure of the Human Femur Diaphysis

by E. Amtmann

Paperback(Softcover reprint of the original 1st ed. 1971)

$109.99 
  • SHIP THIS ITEM
    In stock. Ships in 6-10 days.
  • PICK UP IN STORE

    Your local store may have stock of this item.

Related collections and offers


Overview

According to the classical theory of functional structure of bone which was developed by J. Wolff (1884, 1892) and W. Roux (1895) following the investigations of the functional architecture of the substantia spongiosa by H. von Meyer (1867), bone is "functionally" laid down in gross form as well as in minute architecture in accordance with the "maximum-minimum-law". As a result of functional adaptation, a maximum of efficiency is achieved with a minimum of material (Kummer, 1962a). In this sense functional adaptation is a reaction of adaptation of the idiotype-within the bounds of the reaction norm-to a changed internal environment, that is in this case an adaptation to changed mechanical stresses. 1. The Formation of the Normal Femur Shape The heredity basis of shape characteristics of human femora is really unknown. Identical twins show a significant lower variability of length of femur than binovular twins. Population variability of length of femur due to heritability may exceed twice the variability due to environmental factors (Knussmann, 1968). A significant part of the total variation of femur shape characteristics remains therefore unexplained supposing that the sources of variation due to heritability and environmental factors are also nearly the same for the other traits.

Product Details

ISBN-13: 9783540054641
Publisher: Springer Berlin Heidelberg
Publication date: 01/01/1971
Series: Advances in Anatomy, Embryology and Cell Biology , #44
Edition description: Softcover reprint of the original 1st ed. 1971
Pages: 90
Product dimensions: 6.69(w) x 9.61(h) x 0.01(d)

Table of Contents

A. Introduction.- 1. The Formation of the Normal Femur Shape.- 2. The Functional Structure of the Femur Corticalis.- 3. Forces Acting on Human Femur Cross-sections.- 4. The Aim of the Present Investigation.- B. Materials and Methods.- C. Results.- 1. The Variation in Density of the Femur Shaft.- 2. The Variation of Breaking Strength in the Femur Shaft.- 3. The Variation of Structure Strength in the Shaft.- 4. Cross-sectional Area and Shape.- 5. Thickness of Compacta and Breaking Strength.- 6. Factor Analysis of the Variation Structure of Human Femur Cross-sections.- D. Discussion.- 1. The Problem of Lack of Bone Resorption in the Vicinity of the Neutral Surface.- 2. The Adaptation of Femur Cross-sections to Fluctuating Bending Stresses on the Assumption that Bone is an Isotropic Material.- 3. The Adaptation of the Femur Compacta to Fluctuating Bending Stresses by Means of Specific Distribution of Anisotropic Bone Material.- 4. The Factors Affecting the Variation of Size, Shape, and Structure of the Femur Diaphysis.- Summary.- Zusammenfassung.- Subject-Index.
From the B&N Reads Blog

Customer Reviews