Static_and_Dynamic_Biomechanics_first BPTH.pptx

this ppt includes static and dymanic biomechanics for 1st bpt students

1. BIOMECHANICS AND MOVEMENTS An Overview of Static & Dynamic Biomechanics, Kinematics, Osteokinematics , and Arthrokinematics - Dr. Raj Mhatre

2. STATIC AND DYNAMIC BIOMECHANICS 1. Static Biomechanics: - Study of systems in a state of rest or constant motion. - Involves equilibrium, forces, and torques. 2. Dynamic Biomechanics: - Study of systems in motion with acceleration. - Includes kinematics and kinetics.

3. KINEMATICS Description of motion without considering forces. Focuses on displacement, velocity, and acceleration. Key Concepts: Linear Motion ( translatory motion ) Angular Motion ( rotatory motion ) General motions

4. TRANSLATORY MOTION Translatory motion (linear displacement) is the movement of a segment in a straight line. In true translatory motion, each point on the segment moves through the same distance, at the same time, in parallel paths but in human body pure translatory movements are rare.

5. ROTATORY MOTIONS Rotary motion (angular displacement) is movement of a segment around a fixed axis in a curved path. The fixed axis is known as center of rotation ( COR)

6. GENERAL MOTIONS When non-segmented objects are moved by combining rotation and translation. When rotatory and translatory motions are combined, a number of terms can be used to describe the result. Curvilinear ( plane or planar ) motion . This are the combination of translation and rotation of a segment in two dimensions (parallel to a plane with a maximum of three degrees of freedom). When this type of motion occurs, the axis about which the segment moves is not fixed but, rather, shifts in space as the object moves. This movements occurs around instantaneous Center of rotation ( ICOR)

7. OSTEOKINEMATICS Osteokinematics refers to the rotary movement of the bones in space during physiological joint motion. These are the observable movements of the bony levers in the sagittal, frontal, and transverse planes that occur at joints. The movements are typically described by the plane in which they occur, the axis about which they occur, and the direction of movement.

8. ARTHROKINEMATICS Arthrokinematics is a Physiological joint motion involves rotation of bony segments as well as motion of the joint surfaces in relation to another. Study of joint surface movements. - Key motions: Roll: One joint surface rolls on another. Glide: One surface slides over another. Spin: Rotation around a single axis. - Examples: Shoulder joint rolling during abduction.

9. KI N ETICS Kinetics in biomechanics refers to the study of forces and their effects on the body movements. It focuses on understanding how forces cause movement and how they interact with the structures of the body. Key Concepts in Biomechanical Kinetics: Forces Torque Center of mass Work, Energy, power Ground reaction forces

10. CONCLUSION Biomechanics combines static and dynamic principles to study human movement. Kinematics focuses on motion without forces. Kinetics focuses on forces that are causing movement. Oste o kinematics and arthrokinematics provide insights into bone and joint movements. Together, they enhance understanding of body mechanics in health and performance.