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Modeling the Musculoskeletal Biomechanics of the Human Arm

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Presentation on theme: "Modeling the Musculoskeletal Biomechanics of the Human Arm"— Presentation transcript:

1 Modeling the Musculoskeletal Biomechanics of the Human Arm
Introduction Modeling the Musculoskeletal Biomechanics of the Human Arm B.E.A.R.S Presentation Brian A. Garner Assistant Professor Department of Engineering Textbook pictures from: Nigg, Benno M. and Herzog, W., Biomechanics of the Musculoskeletal System 2nd edition, Chichester and New York: Wiley, 1999 Anatomy pictures from: Marieb, Elaine N., Human Anatomy & Physiology 4th edition, Addison Wesley Longman, Inc. 1998

2 Musculoskeletal Modeling
Model represents: Bone and Joint Mechanics/Dynamics Muscle Lines-of-Action Muscle Physiological Properties Muscle Activation Dynamics Model calculations: Force Acceleration F = M * A Acceleration Force A = F / M

3 Anatomical Database Medical Images from Visible Human Project:
CT Images Cryo-Section Images

4 Anatomical Database 3D Image Reconstruction:

5 Anatomical Database Reconstructed Bones and Muscles

6 Skeletal Anatomy of Arm
Carpals Metacarpals Phalanges Clavicle Scapula Humerus Ulna Radius Clavicle Scapula

7 Ball-and-Socket Joint Behavior
Skeletal Anatomy of Arm Carpals Metacarpals Phalanges Clavicle Scapula Humerus Ulna Radius Ball-and-Socket Joint Behavior

8 Shoulder Joint Model

9 Revolute (Hinge) Joint Behavior
Skeletal Anatomy of Arm Carpals Metacarpals Phalanges Clavicle Scapula Humerus Ulna Radius Revolute (Hinge) Joint Behavior

10 Forearm Joints

11 Scapulothoracic Articulation
Clavicle Scapula

12 Musculoskeletal Modeling
Model represents: Bone and Joint Mechanics/Dynamics Muscle Lines-of-Action Muscle Physiological Properties Muscle Activation Dynamics Model calculations: Force Acceleration F = M * A Acceleration Force A = F / M

13 Muscular Anatomy of Arm

14 Muscular Anatomy of Arm

15 Muscular Anatomy of Arm

16 Muscle Force Action Hypothetical Muscle: Hypothetical Model:

17 Muscle Path Obstacle Models
A number of simple geometric shapes were used to represent the shapes of underlying structures: single cyl, single sphere, double cyl, stub each muscle path was given its own set of obstacles path of muscle computed as shortest distance between attachment sites around obstacles

18 Muscle Force Action Reconstructed Muscle Centroid Line-of-Action
Modeled Muscle Path

19 Muscle Force Action Other Modeled Muscle Paths:

20 Muscle Force Action Shoulder Muscles: Forearm Muscles:

21 Muscle Force Action Supraspinatus Biceps Brachii

22 Musculoskeletal Modeling
Model represents: Bone and Joint Mechanics/Dynamics Muscle Lines-of-Action Muscle Physiological Properties Muscle Activation Dynamics Model calculations: Force Acceleration F = M * A Acceleration Force A = F / M

23 Muscle Physiology

24 Muscle Physiology

25 Muscle Physiology

26 Muscle Physiology

27 Muscle Physiology

28 Muscle Physiology

29 Modeling Muscle Physiology
Physiological Parameters: Force vs. Length maximum isometric force optimal muscle fiber length pennation angle rest length of tendon

30 Modeling Muscle Physiology
Optimization of Parameters:

31 Modeling Muscle Physiology


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