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Basics of Biomechanics
Ajay Bahl, Sharad Ranga, Rajnish Sharma
1:
Motion
UNIFORM MOTION
NON UNIFORM MOTION
GRAPHICAL REPRESENTATIONS OF UNIFORM AND NON UNIFORM MOTION
Equation of Motion
Second Equation of Motion
Third Equation of Motion
Uniform Circular Motion as Accelerated Motion
GALILEO'S STUDY ON THE MOTION OF OBJECTS
NEWTON'S LAW OF MOTION
First Law
Second Law
Third Law
Alternatively
2:
Force
BALANCED FORCES
Balanced Forces May Change Shape (Figs 2.5 and 2.6)
The Resultant Force
Unbalanced Forces
Unbalanced Force: External, Internal and External Forces
Universal Character of Gravitation
Distinction between Gravitation and Gravity
THE UNIVERSAL LAW OF GRAVITATION
UNIVERSAL GRAVITATIONAL CONSTANT
3:
Velocity
4:
Acceleration
5:
Friction
6:
Work
7:
Energy
8:
Power
9:
Scalar and Vector Quantities
10:
Torque
11:
Rotation
12:
Body Movements
MOVEMENTS OF THE NECK
MOVEMENTS OF THE SPINE
MOVEMENTS OF SHOULDER
13:
Normal Human Locomotion
MEASURING OF THE EXTERNAL FORCES
14:
Pathological Gaits or Abnormal Walking
REQUIREMENTS FOR THE GAITS ARE
Results
15:
ADL
DEFINITION
SCOPE OF ADL IN REHABILITATION
IMPORTANT AREAS IN WHICH ADL PLAY SIGNIFICANT ROLE
AIMS AND OBJECTIVES OF ADL TRAINING
GOALS OF SELF-HELP DEVICES (SHD)
MAIN GOALS OR FACTORS AFFECTING SELECTION OF AIDS
I. Personal Factors
Physical status
Main Goals
PHYSIOLOGICAL AND PSYCHOLOGICAL ACCEPTANCE OF DISABILITY AND AIDS
PRINCIPLES OF MATERIAL DESIGNING
ROLE OF OT AND PT IN ADL
Different Approaches of ADL
ADL Scale—“FIM SCALE” (Functional Independence Measures)
16:
Prosthesis
DEFINITION
PRINCIPLES OF PROSTHETICS
Contraindications
17:
Lower Extremity Prosthesis
I. ENDOSKELETAL PROSTHESIS (INTERNAL SUPPORT)
Advantages
II. EXOSKELETAL PROSTHESIS
Jaipur foot—an exoskeleton type of prosthesis (Fig. 17.3)
General Description Guidelines of Lower Extremity Prosthesis
PROSTHETICS
Causes of Need of Prosthesis
PRINCIPLE LOWER LIMB PROSTHESIS ARE
I. PARTIAL FOOT PROSTHESIS
LEVEL OF AMPUTATION AND PROSTHESIS REQUIRED
1. Amputation of Toes
2. Ray Amputation
3. Transmetatarsal Amputation
4. Tarsometatarsal Amputation
Above Ankle Design
Below Ankle Design
II. SYME ANKLE DISARTICULATION AND SYME PROSTHESIS
TRANSTIBIAL OR BELOW KNEE AMPUTATION And PROSTHESIS
Intermediate Prosthesis
Definite Below Knee Prosthesis
FOOT ANKLE ASSEMBLY
Functions
Prosthetic Foot
Internal Keel Type (Fig. 17.4)
External Keel Type (Fig. 17.5)
Articulated Foot
Articulated Feet
Rotators
Shank
Exoskeletal Shank (Fig. 17.6)
Endoskeletal Shank (Fig. 17.7)
Socket (Figs 17.8 A to D)
PTB CAN BE OF 3 TYPES
Air Cushion Socket
Flexible Socket with Rigid External Frames
Socket
Syme's Socket
Suspension
Cuff Variation
ABOVE KNEE OR TRANSFEMORAL AMPUTATION PROSTHESIS
COMPONENTS OF ABOVE KNEE PROSTHESIS
Foot Ankle Assembly
Shank—Explained in Below Knee Prosthesis
Knee Unit
Friction Mechanism
Extension Aids
Stabilizers
Socket
Quadrilateral Socket
Ischial Containment Socket
Fit and Alignment
Suspension
18:
Upper Limb Prosthesis
TYPES
Body Powered Prosthesis
Externally Powered Prosthesis
PARTIAL HAND AMPUTATION AND PROSTHESIS
Indications
LEVELS OF AMPUTATION (FIG. 18.1)
WRIST DISARTICULATION AND TRANSRADIAL (BELOW ELBOW AMPUTATION) BELOW ELBOW PROSTHESIS
Wrist Disarticulation, Below Elbow Prosthesis
Immediate and Early Postsurgical Prosthesis
Advantages
Preparatory/Training Mechanical Prosthesis
Advantages
Definitive Mechanical Prosthesis
COMPONENTS OF DEFINITIVE BELOW ELBOW PROSTHESIS
Socket
Terminal Device or Prehension Device (Fig. 18.2)
Classification
Wrist Unit—Serve 2 Basic Functions
Types
Elbow Units
Control Cable System (Fig. 18.4)
Harness System
Heavy Duty or Saddle-shoulder Harness (Fig. 18.6)
Bilateral Transradial Harness (Fig. 18.7)
Advantages and Disadvantages of Mechanical Prosthesis
Advantages
Disadvantages
ELBOW DISARTICULATION AND ABOVE ELBOW AMPUTATION AND PROSTHESIS
Physical Factors Affecting Prosthesis
Levels of Amputation (Fig. 18.8)
Components
Socket
Supracondylar Pads (Fig. 18.10)
Control Cable
FIRST CABLE OR ELBOW FLEXION/TERMINAL DEVICE CONTROL CABLE
SECOND CABLE OR ELBOW LOCK CONTROL CABLE
Operating Sequence of Cables (Fig. 18.11)
Standard Transhumeral Harness System
Harness System for Standard above Elbow Prosthesis
19:
Spinal Orthotics
DEFINITION
FUNCTIONS OF A SPINAL ORTHOTICS
Categories of Spinal Braces
BASIC COMPONENTS OF SPINAL ORTHOTICS
Pelvic Band
Function
Thoracic Band
Location
Function
Lumbosacral/ Thoracolumbosacral Posterior Uprights Location
Function
Lateral Uprights
Location
Function
Full Front Abdominal Support
Location
Function
Other Straps
PRINCIPLE OF FUNCTIONING
CLASSIFICATION OF SPINAL ORTHOTICS
Lumbosacral Flexion External Control Orthosis
Functions
Sacral Orthosis
Components
Additional
Function
Extension and Lateral Control Orthosis
WILLIAM'S BRACE (FIG. 19.4)
Components
3-Point Pressure System
Application
Thoracolumbosacral Flexion Extensions Control Orthosis
TAYLAOR'S BRACE (FIG. 19.5)
Components
Functions
Application
Thoracolumbosacral Flexion Extension Control and Lateral Control Orthosis
STEINDIER'S BRACE (FIG. 19.6)
Components
Function
Anterior Spinal Hyperextension Brace: (ASH Brace) (Fig. 19.7)
Components
Function
Spinal Corsets
Cervicothoracolumbosacral Orthoses (CTLSO)
MILWAUKEE BRACE
Indications
Principle of Production
Basically an Orthosis has 4 Force System
Result
Boston's Brace — TLSO Passive Supportive Brace
Adjustment of Corrective Pads
CERVICAL ORTHOSIS
Goals of Cervical Orthosis
Indications of CO's
Classification of CO's
Soft Cervical Orthosis (Fig. 19.9)
Semirigid CO's
Rigid/Hard CO's (Fig. 19.10)
Head Cervical Orthosis (HCO)
HCTO — SOMI Cervical Orthosis
Advantages of SOMI
20:
Orthotics
USERS OF LOWER LIMB ORTHOTICS
Users of Orthotic Devices
INDICATIONS OF ORTHOSIS
Principles Used
Hydrodynamic Soft Tissue Compression
FUNCTION OF ORTHOSIS
Mechanical Principles of Orthosis
Functions
PRINCIPLES OF ORTHOSIS
Principles of Orthotic Application
Principles of Orthotic Fit and Alignment
Creations of Deformity can be done in following ways:
Indications
Exercises Muscles and Joints
Principles of Orthotic Application/Ideal Characteristics of Orthosis
21:
Upper Limb Orthoses
FUNCTIONS
HAND AND WRIST ORTHOSES
Assistive and Substitutive
Categories
A. Positional Orthoses
Functions
Accessories used
Types
Functions
Functions
B. Prehension Orthoses
Types of Orthoses
C. Utensil Holders (Universal splint, ADL splint)
PROTECTIVE ORTHOSES
Types
Wrist Hand Stabilizers
Functions
Digital Stabilizers
Functions
Functions
CORRECTIVE ORTHOSES
Type
Function
Function
Function
Function
Function
ELBOW AND SHOULDER ORTHOSES
Functions
PROTECTIVE ORTHOSES
Functions
Major Categories
Functions
Functions
CORRECTIVE ORTHOSES
BALANCED FOREARM ORTHOSES
Components
22:
Lower Limb Orthoses
ANKLE FOOT ORTHOSES
Functions
Indications
Conditions in AFO Prescribed
Types of Ankle Joints
Plastic Designs
Metal and Metal Plastic Designs
Upright and Calf Bands
Functions
Caliper
Drawbacks
SHOE INSERT
ANKLE JOINTS AND CONTROLS
ANKLE STOPS
ANKLE JOINT ASSISTS (FIG. 22.4)
Varus-Valgus Correction (T-straps)
PLASTIC DESIGNS
Spiral
KNEE ORTHOSIS
Indications
Treatment Objectives
DYNAMIC PATELLAR ORTHOSIS (FIG. 22.9)
Purposes
SWEDISH KNEE CAGE ORTHOSIS (FIG. 22.10)
THREE-WAY KNEE STABILIZER (FIG. 22.11)
EXTENSION KO
CARS-UBC ORTHOSIS
Biomechanics
SUPRACONDYLAR KNEE ORTHOSIS (FIG. 22.14)
KNEE-ANKLE-FOOT ORTHOSIS (KAFO)
Indications
Functions
DOUBLE UPRIGHT KAFO
Mechanical Knee Joint (Fig. 22.17)
*Types of Mechanical Knee Joint
Accessory Pads and Straps
Supracondylar KAFO (Fig. 22.26)
HIP ORTHOSES (HO)
Indications
CONGENITAL DISLOCATION OF HIP
PERTHES DISEASE
SEVERE PARALYTIC DISORDERS AND ABERRANT HIP MOVEMENTS
Hip Joint (Fig. 22.36)
Hip Knee Ankle Foot Orthosis (HKAFO) (Fig. 22.37)
Lumbosacroiliac Hip Knee Ankle Foot Orthosis (LSHKAFO)
PATTERN END CALIPER (FIG. 22.38)
Foot-shoe modification
AFO (Fig. 22.40)
Knee
23:
Foot Orthosis
FLAT FOOT SHOE
Flat Foot
Other Means of Lateral Weight Shift and Medial Long. Support
+ Valgum
Mermaid Splint
Over Corrected Shoe
CONGENITAL TALIPES EQUINOVARUS SHOE (CTEV SHOE) (FIG. 23.6)
HEEL ELEVATION MODIFICATION FOR SHORTENING OF LEG
METATARSAL ARCH SUPPORTS – SHOE MODIFICATION
Deformities of Metatarsal Arches
PAINFUL HEEL SHOE MODIFICATION
SPECIFICATIONS OF LOWER LIMB ORTHOSES
1. Foot Orthoses
Indications
INDEX
TOC
Index
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