Dictionary > Posturography


Computerized Dynamic posturography (CDP) includes isolation and quantification of:
orientation inputs from the visual, vestibular, and somatosensory systems
• Central integrating mechanisms for selecting functionally appropriate orientation sense(s)
• Functionally appropriate movement strategy(ies) in a variety of controlled task conditions
motor output mechanisms for generating timely and effective postural movements
As defined, CDP is the only method validated by controlled research studies to isolate the functional contributions of vestibular inputs, visual inputs, somatosensory inputs, central integrating mechanisms, and neuromuscular system outputs for postural and balance control.
During CDP testing, the patient stands on a movable, force-sensing support surface and within a movable visual surround. Movements of the support surface and/or visual surround, under precise control of a computer, are used to modify the sensory conditions and/or to impose unexpected perturbations. The computer processes the signals from the force-sensing surface to quantify the patient’s postural stability under modified sensory conditions, as well as the patient’s motor reactions to the unexpected perturbations.
CDP includes three protocols:
• The Sensory organization test (SOT) assesses the patient’s ability to balance using visual, vestibular, and proprioceptive information and to appropriately suppress disruptive visual and/or proprioceptive information under sensory conflict conditions.
• The Motor control test (MCT) measures the patient’s ability to reflexively recover from unexpected external provocations.
• The Adaptation test (ADT) measures the ability to modify automatic reactions when the support surface is irregular or unstable.
A force platform that evaluates somatosensory and visual influences on posture and equilibrium.
Synonym: dynamic platform posturography.
Origin: posture – g. Grapho, to write

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