Essential Concepts
The body is either at rest or in steady-state motion
What is equilibrium
Provides information about the position and motion of the body and body parts relative to each other and the support surface
What is the Somatosensory System?
Seen with large force displacements of the COM beyond the limits of stability
What is stepping strategy?
Has 3 functions, stabilizing visual images, maintain postural stability, and providing information used for spatial orientation
What is the peripheral vestibular system?
Subjective experience of motion of objects in the visual environment that are known to be stationary
What is oscillopsia?
When the body’s center of mass (COM) or center of gravity (COG) is maintained over its base of support
What is balance is greatest?
If I suffer from Vertigo, I am having a problem with my ______________system?
What is vestibular system?
Utilized to control mediolateral perturbations by shifting the body.
What is the weight-shift strategy?
Located in the vestibular labyrinth. Helps detect head acceleration.
What are semicircular canals?
A sensation of unsteadiness or feeling off-balance
What is dysequilibrium?
The sway boundaries in which an individual can maintain equilibrium without changing his or her BOS
What is Limits of Stability
The ability to maintain balance in response to unexpected external perturbations.
What is Automatic Postural Responses?
Utilized with rapid and/or large external perturbations or for movements executed with the COG near the limits of stability
What is the hip stratgey?
Contains the saccule and utricle respond to linear acceleration and static head tilt.
What are otolith organs?
What is why do people fall?
The ability to maintain a center of mass over an ever-changing base of support
What is Dynamic Balance?
My body can be divided into left to right by this plane.
What is sagittal plane?
Used with quiet stance and during small perturbations (imbalances)
What are ankle strategies?
Responsible for maintaining stability of an image on the fovea of the retina during rapid head movements
What is the Vestibulo-Ocular Reflex?
1/3 of adults over 65 will fall each year, often people lose confidence after a fall, 20 – 30% of falls results in moderate to severe injury.
What is why do we assess balance?
The perimeter of the contact area between the body and its support surface
What is Base of Support?
Visual , Vestibular and Somatosensory systems are mechanisms of
What is balance?
Occurs before actual stimulus, requires awareness, challenged by quick sudden movements
What is anticipatory postural responses?
Illusion of movement, spinning sensation.
What is vertigo?
Refers to intentional adjustments or changes in posture that an individual consciously makes to maintain balance or reposition themselves
What is volitional postural movements?