Lesson 5- Postural Control Flashcards
What is the 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
What is the point at the center of the total body mass?
Center of Mass (CoM)
What is the vertical projection of the center of mass?
Center of Gravity (CoG)
What is the center of the distribution of total force applied to the supporting force?
Center of Pressure (CoP)
What is the biomechanical alignment of the body and the orientation of the body in the environment?
Posture
What is control of the body’s position in space for orientation and stability?
Postural Control
What is activity increases in antigravity muscles, which keeps the body from collapsing in response to the pull of gravity during quiet stance?
Postural Tone
What is the ability to maintain an appropriate relationship between body segments, and between the body and the environment for a specific task?
Postural Orientation
What is the ability to control the center of mass in relationship to the base of support?
Posture Stability or Balance
What are the 6 movement strategies to maintain balance?
- Control body sway
- Feedback control
- Feedforward (anticipatory) control
- Anteroposterior stability
- Lateral stability
- Multidirectional stability
When is controlling body sway used?
During quiet stance
When is feedback control used?
When the support surface moves and when there are disruptions to gait
What is synergy?
The functional coupling of groups of muscles that are constrained to ACT TOGETHER as a unit
During ankle strategy… what muscles are activated?
opposite muscles of the direction of sway
During hip strategy… what muscles are activated?
same side muscles of the direction of sway
What is the timing for muscle activating during ankle strategy? What type of perturbations?
Distal to proximal
Smaller perturbations
What is the timing for muscle activating during hip strategy? What type of perturbations?
Proximal to distal
Large and fast disturbance
What is the timing of muscle activation during lateral stability?
proximal to distal
Which structure is in control of adaptation?
Cerebellum
Which structure is in control of basal ganglia?
Postural Set
What type of input deals with the relationship of our body to objects in the environment?
Visual
What type of input deals with the surface of support?
Somatosensory
What type of input deals with gravity?
Vestibular
What does visual input tell us?
The relationship of our body to objects in the environment
