Test #2 Flashcards
Relationship of body segments to one another, as well as to the position of the body with reference to gravity and the base of support.
Alignment
Point at center of the total body mass
Center of Mass
Vertical projection of the center of mass
Center of Gravity
Center of distribution of total force applied to supporting surface
Center of Pressure
The biomechanical alignment of the body and the orientation of the body in the environment
Posture
Control of the body’s position in space for orientation and stability-is fundamental to everything we do
Postural control
Activity increases in antigravity muscle, which keeps the body from collapsing in response to the pull of gravity during quiet stance
Postural tone
Ability to maintain an appropriate relationship between body segments, and between the body and the environment for a specific task
Postural orientation
Ability to control the center of mass in relationship to the base of support
Postural stability or balance
An event that results in a person coming to rest inadvertently on the ground (unplanned or unexpected)
Clinical definition of Fall
Movement of the CoM outside of the BoS
Research definition of Fall
Movement strategy is needed to maintain stability during quiet stance is characterized by:
Controlling body sway
Postural control that occurs in response to sensory feedback from an unexpected perturbation
Feedback Control
Postural responses that are made in anticipation of a voluntary movement potentially destabilizing in order to maintain stability during movement (anticipates the disturbance to balance, based on past experience)
Feedforward Control
Functional coupling of groups of muscles that are constrained to act together as a unit
Synergy
