Balance Flashcards
Postural control
Controlling body position for stability and orientation
Postural orientation
Maintain relationship between segment and body and
Environment
Posture stability (balance)
Control COM in relationship to BOS with balanced forces
Center of mass
Center of the body mass, average of body segments
Center of mass on Adults
S2
Center of gravity
Vertical projection of COM, changes with environment
Center of pressure
Center distribution of total force, sum of all forces on the floor
Base of support
Body part in contact with support surface, usually feet
Vertical line of body alignment: Standing
Mastoid process, anterior to shoulders, hip joints, anterior to knee joints, anterior to ankle joints
Muscle tone
Force to which a muscle resists being lengthened
Postural tone
Increase in activity of postural muscles, requires sensory input from multiple systems
-gastroc, tib ant, glut med, tfl, ilipsoas, errectors
Balance Considerations
Vision, vestibular, and proprioception
3 Types of Postural Control
Automatic (Steady state), reactive, proactive/anticipatory
Ankle strategy
Small perturbation, reactive balance training
-rotation around ankle joint
Post Displacement:
-dorsiflexors, quads, abs
Ant Displacement:
-plantarflexors, gastroc, hamstring, errectors
Hip Strategy
Larger, faster perturbation, ankle motion limited
Post Displacement:
-quads, abs
Ant Displacement:
-hamstring, errectors
