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Table 1 Function of Basic Modules in Multisensing Biofeedback Systems for Task Training.

From: Recent developments in biofeedback for neuromotor rehabilitation

Component Function
Multiple Sensors Multiple sensors transform various physiological or movement related information into recordable electronic signals.
Data Acquisition Analog signals from multiple sensors are sampled, quantified and streamed into a control system.
Data Processing The digital filter smoothes the data. The embedded algorithm or mathematical model can derive the secondary parameters as biofeedback indices.
Central Controller The central controller is the kernel of the system. This module receives data from multiple sensors. Based on the biofeedback rules and user's pervious performance, the fusion algorithm in the controller identifies the participant's current state of task performance and decides the cue display.
Biofeedback Rule Base This module stores a set of rules or criteria that can be defined by therapist via user interface or by prior knowledge of performance contained in the database. The rules or criteria are elements of the fusion algorithm. Decision making regarding the feedback display must obey these rules.
Multimodal Biofeedback Cue This component configures the display hardware such as the screen, speaker, and haptic device. The program controls the display of augmented multimodal feedbacks based on commands from the controller.
Database The database functions the same as traditional memory but with a more efficient structure for data management. It stores the parameters that are important to quantitatively evaluate the motor performance of patient. The controller and rule base access the database, query the patient's prior performance, and then adjust the feedback parameters and display. The database also allows direct access from authorized users.
Human-Machine Interface This module configures the operation setting, rule choosing, etc. Through the human-machine interface, clients can customize the biofeedback training program based on their preferences. Authorized therapists or clients can access the record of a specific patient from the database to evaluate progress toward recovery.