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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
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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
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Anatomical Database Medical Images from Visible Human Project:
CT Images Cryo-Section Images
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Anatomical Database 3D Image Reconstruction:
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Anatomical Database Reconstructed Bones and Muscles
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Skeletal Anatomy of Arm
Carpals Metacarpals Phalanges Clavicle Scapula Humerus Ulna Radius Clavicle Scapula
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Ball-and-Socket Joint Behavior
Skeletal Anatomy of Arm Carpals Metacarpals Phalanges Clavicle Scapula Humerus Ulna Radius Ball-and-Socket Joint Behavior
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Shoulder Joint Model
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Revolute (Hinge) Joint Behavior
Skeletal Anatomy of Arm Carpals Metacarpals Phalanges Clavicle Scapula Humerus Ulna Radius Revolute (Hinge) Joint Behavior
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Forearm Joints
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Scapulothoracic Articulation
Clavicle Scapula
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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
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Muscular Anatomy of Arm
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Muscular Anatomy of Arm
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Muscular Anatomy of Arm
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Muscle Force Action Hypothetical Muscle: Hypothetical Model:
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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
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Muscle Force Action Reconstructed Muscle Centroid Line-of-Action
Modeled Muscle Path
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Muscle Force Action Other Modeled Muscle Paths:
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Muscle Force Action Shoulder Muscles: Forearm Muscles:
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Muscle Force Action Supraspinatus Biceps Brachii
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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
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Muscle Physiology
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Muscle Physiology
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Muscle Physiology
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Muscle Physiology
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Muscle Physiology
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Muscle Physiology
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Modeling Muscle Physiology
Physiological Parameters: Force vs. Length maximum isometric force optimal muscle fiber length pennation angle rest length of tendon
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Modeling Muscle Physiology
Optimization of Parameters:
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Modeling Muscle Physiology
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