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20 Cards in this Set
- Front
- Back
Define Biomechanics
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: The application of mechanical laws to living structures, specifically to the locomotor system of the human body. (B&P 11)
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Define Kinematics
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The branch of mechanics that deals with the geometry of the motion of objects, including displacement, velocity, & acceleration, without taking into account the forces that produce the motion. (P&B 11)
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Define Kinetics
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: The study of the relationships between the force system acting on a body and the changes it produces in body motion. (P&B 11)
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Define Sagittal
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Sagittal (A to P): Vertical plane that divides the body into right & left (flexion & extension occur in this plane)
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Define Coronal
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(Frontal): Vertical plane that divides the body into front & back (lateral or side to side motions occur in this plane)
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Define Transverse
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Horizontal plane that divides the body into upper and lower components (rotation occurs in this plane)
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X-axis runs which way?
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side to side
Flexion & extension occur around this axis, but in the saggital plane. |
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Y-axis runs which way?
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: Runs up and down
Rotation occurs around this axis, but in the transverse plane. |
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Z-axis runs which way?
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Runs front to back
Lateral bending occurs around this axis, but in the coronal plane |
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Weight = mass (on earth)
Weight = 1/6 mass (on the moon) Weight = 0 (in space) ***Weight = mass x force of gravity |
Weight = mass x force of gravity
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What is Center of Mass aka CoM?
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) is a theoretical construct that is defined as a point about which the bodies mass is equally distributed.
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Center of Mass (CoM) = ??
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Center of Gravity CoG
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This Base of support is?
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the area which supports the mass above
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What is Translational motion?
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(linear displacement): Each point on a segment moves in a straight line through the same distance, at the same time, through parallel paths. (push or pull a glass of water)
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What is rotational motion?
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Rotational (angular displacement): Each point on a segment moves in a curved path around a fixed axis through the same angle, at the same time, at a constant distance from the axis. (lift water glass at elbow)
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Trnalational Movement explained further
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: all points on the object movie the same distance.
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Rotational movement explained further
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all points move around a central fixed center of rotation
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General Motionis a combination of?
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translational (translatory) & rotational (rotatory) motion
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General motion involves an instantaneous....
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Center of Rotation (ICoR) or Instantaneous Axis of Rotation (IAoR)
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General motion, in the body, most joint rotations occur across??
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3 planes (are 3 dimensional) & involve helical or screw axis type motion (Drinking)
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