COMPLETE SOLUTIONS
what are the 3 essential requirements for locomotion?
1. postural control
2. progression
3. adaptation
what is postural control and what does it consist of?
orientation and stability
- consists of steady-state, reactive control, and anticipatory control
what is progression?
motion in the desired direction through activation of basic locomotor pattern
- ability to initiate and terminate motion
what is adaptation?
adapting changes in task and environment
what are the 3 requirements for stability with upright stance?
1. alignment
2. orientation
3. control of COM
what are additional requirements for stability with gait? (4)
1. initiation and termination
2. dynamic stability of the moving body
, 3. accurate foot placement
4. obstacle avoidance
what do anticipatory strategies require? (2)
1. prediction: recruitment necessary for stability
2. use of vision: scan environment
what are 2 strategies employed that are used in anticipatory strategies?
1. avoidance strategies: changing foot placement, changing direction of movement,
stopping
2. accommodation strategies: shortening step length on slippery surface
what are examples of when anticipatory strategies are tied to adaptation?
1. obstacle crossing
2. change in surface conditions
3. inclines
4. turns
young adults ___ ML COM excursion; older adults have ___ ML COM excursion
- minimize
- great
when do individuals go around vs step over obstacles/objects?
obstacle size 1:1 with leg length - individuals go around
when do individuals increase toe clearance?
if perceived object is fragile
what are 3 examples of change in surface conditions?