Abstract: A force measurement system includes a force measurement assembly with a top surface configured to receive at least one portion of the body of a subject and at least one force transducer configured to sense forces and/or moments being applied to the top surface; at least one visual display device having an output screen, the output screen comprising an overhanging top portion so that a top edge of the output screen is not readily visible to the subject; and one or more data processing devices operatively coupled to the force measurement assembly and the at least one visual display device. In one or more embodiments, the force measurement assembly may be in the form of an instrumented treadmill. In one or more further embodiments, the force measurement system may additionally comprise a motion capture system configured to detect the motion of one or more body gestures of the subject.

Abstract: A load transducer system is disclosed herein. The load transducer system includes a load transducer and a data processing device. The load transducer has a load transducer frame portion configured to elastically deform when a load is applied to the load transducer; and one or more deformation sensing elements, disposed on the load transducer frame portion, sensitive to one or more respective force or moment components of the load. The data processing device is operatively coupled to the one or more deformation sensing elements of the load transducer, the data processing device is configured to determine one or more output forces or moments from one or more respective output signals of the one or more deformation sensing elements, to determine one or more deformation compensation parameters for the load transducer system, and to correct the one or more output forces or moments using the one or more deformation compensation parameters.

Abstract: A force measurement system includes a plurality of force measurement assemblies arranged in a loop configuration, the plurality of force measurement assemblies configured to be displaced around a continuous path of movement such that a particular one of the plurality of force measurement assemblies that is disposed underneath a subject varies over time. Each of the plurality of force measurement assemblies includes a top surface for receiving at least one portion of the body of the subject; and at least one force transducer, the at least one force transducer configured to sense one or more measured quantities and output one or more signals that are representative of forces and/or moments being applied to the top surface of the force measurement assembly by the subject. The force measurement system may additionally comprise a data processing device operatively coupled to each of the force transducers of each of the force measurement assemblies.

Abstract: A force measurement system that includes at least one force plate module is disclosed herein. The at least one force plate module has a plurality of force plate assemblies supported on a base component, each of the force plate assemblies includes a plate component having a top surface, the top surface of the plate component forming a force measurement surface for receiving at least one portion of a body of a subject; and at least one force transducer, the at least one force transducer configured to sense one or more measured quantities and output one or more signals that are representative of the one or more measured quantities, the plate component being supported on the at least one force transducer. The at least one force plate module is configured to be connected to one or more additional force plate modules so as to form a modular array of force plates.

Abstract: A system and method for measuring eye movement and/or eye position and postural sway of a subject is disclosed herein. The system generally includes an eye movement tracking device, a postural sway detection device, and a data processing device operatively coupled to the eye movement tracking device and the postural sway detection device. During the execution of the method, the eye movement and/or eye position of the subject is measured using the eye movement tracking device, and the postural sway of the subject is measured using the postural sway detection device. A method for determining a gaze direction of a subject during a balance test and/or concussion screening test, and a method for assessment of a medical condition of a subject are also disclosed herein.

Abstract: A load transducer is disclosed herein. The load transducer includes a body portion having a plurality of sides, the plurality of sides of the body portion including a first side; a plurality of beam portions including a first beam portion and a second beam portion, the first beam portion being coupled to the body portion, the second beam portion being coupled to the first beam portion, and the second beam portion extending along the first side of the body portion; and at least one load cell disposed on one or more of the plurality of beam portions, the at least one load cell configured to measure at least one force or moment component of a load applied to the load transducer. A force measurement assembly including a plurality of load transducers with first and second beam portions is also disclosed herein.

Abstract: A force measurement system is disclosed herein. The force measurement system includes a force measurement assembly configured to receive a subject thereon, at least one visual display device having an output screen, and one or more data processing devices configured to generate a screen image comprising a plurality of substantially concentric bands on the output screen of the at least one visual display device that is configured to create a visual stimuli for the subject disposed on the force measurement assembly. A method for testing a subject is also disclosed herein. The method for testing a subject utilizes reality-altering glasses that are used to perturb a visual input of a subject. Also, in one or more embodiments, the reality-altering glasses are used in conjunction with a force measurement assembly configured to receive the subject thereon.

Abstract: A balance and/or gait perturbation system is disclosed herein. The balance and/or gait perturbation system includes a balance and/or gait perturbation device and a data processing device. The balance and/or gait perturbation device includes one or more displaceable components configured to be displaced at a plurality of different positions, and having one or more surfaces for receiving one or more respective limbs of the person; and one or more first actuators coupled to the one or more displaceable components to adjust the displacement position of the one or more displaceable components. The data processing device is configured to generate a stochastic signal for introducing a perturbation to the one or more displaceable components, and to control the displacement position of the one or more displaceable components using the stochastic signal such that the one or more displaceable components perturb a balance and/or gait of the person.

Abstract: A gait perturbation system and a method for testing and/or training using the gait perturbation system is disclosed herein. The gait perturbation system includes a gait perturbation device and a data processing device. The gait perturbation device includes one or more displaceable components configured to be displaced at a plurality of different speeds, and having one or more respective surfaces for receiving one or more respective limbs of a person; and one or more speed adjustment mechanisms coupled to the one or more displaceable components to adjust the speed set point at which the one or more displaceable components are displaced. The data processing device is configured to generate a signal for introducing a perturbation to the one or more displaceable components, and to control the speed set point of the one or more displaceable components such that the one or more displaceable components perturb a gait of the person.

Abstract: A force measurement assembly with damping is disclosed herein. The force measurement assembly includes a force measurement surface for receiving at least one portion of a body of a subject; at least one force transducer, the at least one force transducer configured to sense one or more measured quantities and output one or more signals that are representative of forces and/or moments being applied to the force measurement surface of the force measurement assembly by the subject; at least one base member disposed underneath the at least one force transducer or forming a part of the at least one force transducer; and a damping member disposed between the at least one base member and a mounting surface on which the force measurement assembly is disposed. A force measurement system that includes the force measurement assembly with damping is also disclosed herein.

Abstract: A force measurement system includes an instrumented treadmill with one or more displaceable components having one or more respective surfaces for receiving one or more respective limbs of the subject, and at least one force transducer. The force measurement system further includes a data processing device configured to receive one or more load signals from the at least one force transducer, to convert the one or more load signals into one or more output load components, and to determine one or more gait parameters for the subject from the one or more output load components; and a sensory output device configured to receive at least one sensory output signal from the data processing device, and to generate at least one of a visual indicator, an audible indicator, and a tactile indicator that is based upon the at least one sensory output signal and provides biofeedback to the subject.

Abstract: A force measurement system includes a force measurement assembly configured to receive a subject thereon, at least one visual display device having an output screen, and one or more data processing devices configured to generate a screen image comprising a plurality of substantially concentric bands on the output screen of the at least one visual display device that is configured to create a visual stimuli for the subject disposed on the force measurement assembly. A plurality of methods for testing a subject is also disclosed herein. The methods for testing a subject utilize a force measurement assembly and/or augmented reality glasses. A measurement system including a motion detection system, an object position detection system, and/or an eye movement tracking device is additionally disclosed herein.

Abstract: A system for testing the vision of a subject incorporating eye movement tracking is disclosed herein. The system includes a head motion sensing device configured to measure a velocity or speed of a head of a subject, an eye movement tracking device configured to measure an eye movement of the subject, a visual display device configured to display one or more visual objects so that the one or more visual objects are visible to the subject; and a data processing device operatively coupled to the head motion sensing device, the eye movement tracking device, and the visual display device, the data processing device being specially programmed to carry out the steps of the vision tests. A method for the testing the vision of a subject incorporating eye movement tracking is also disclosed herein.

Abstract: A load transducer is disclosed herein. The load transducer includes a body portion having a plurality of sides, the plurality of sides of the body portion including a first side; a plurality of beam portions including a first beam portion and a second beam portion, the first beam portion being coupled to the body portion, the second beam portion being coupled to the first beam portion, and the second beam portion extending along the first side of the body portion; and at least one load cell disposed on one or more of the plurality of beam portions, the at least one load cell configured to measure at least one force or moment component of a load applied to the load transducer. A force measurement assembly including a plurality of load transducers with first and second beam portions is also disclosed herein.

Abstract: A load transducer is disclosed herein. The load transducer includes a plurality of beam portions connected to one another in succession, the plurality of beam portions being arranged in a circumscribing pattern whereby a central one of the plurality of beam portions is at least partially circumscribed by one or more outer ones of the plurality of beam portions; and at least one load cell disposed on one of the plurality of beam portions, the at least one load cell configured to measure at least one force or moment component of a load applied to the load transducer. A force measurement assembly including a plurality of load transducers with beam portions arranged in a circumscribing pattern is also disclosed herein.

Abstract: A movement assessment apparatus configured to provide biofeedback to a user regarding one or more movements executed by the user is disclosed herein. The movement assessment apparatus generally includes a sensing device comprising one or more sensors, a data processing device operatively coupled to the sensing device, and a sensory output device operatively coupled to the data processing device. The data processing device is configured to determine executed motion data of a body portion of the user and/or executed motion data of an object manipulated by the user using one or more signals from the one or more sensors, to compare the executed motion data or a modified form of the executed motion data to baseline motion data of a reference motion, and to determine how closely the executed motion data or the modified form of the executed motion data conforms to the baseline motion data of the reference motion.

Abstract: A load transducer is disclosed herein. The load transducer includes a plurality of beam portions connected to one another in succession, the plurality of beam portions being arranged in a circumscribing pattern whereby a central one of the plurality of beam portions is at least partially circumscribed by one or more outer ones of the plurality of beam portions; and at least one load cell disposed on one of the plurality of beam portions, the at least one load cell configured to measure at least one force or moment component of a load applied to the load transducer. A force measurement assembly including a plurality of load transducers with beam portions arranged in a circumscribing pattern is also disclosed herein.

Abstract: A system for testing the vision of a subject and/or training head-eye coordination associated with the vision of a subject is disclosed herein. The system includes a visual display device having an output screen, the visual display device configured to display one or more visual objects on the output screen so that the one or more visual objects are visible to the subject; and a data processing device, the data processing device operatively coupled to the visual display device, the data processing device being specially programmed to carry out the steps of the vision tests and training procedures. In one or more embodiments, the system may further include a motion sensing device, the motion sensing device configured to measure a velocity or speed of a head of a subject, and the motion sensing device being operatively coupled to the data processing device.

Abstract: A measurement and testing system comprising a plurality of measurement assemblies and a data acquisition and processing device is disclosed. Each of the plurality of measurement assemblies includes a measurement surface for receiving at least one portion of a body of a subject; and at least one measurement device configured to sense one or more measured quantities and output one or more signals that are representative of the one or more measured quantities. In one embodiment, the data acquisition and processing device is configured to determine whether a load is being applied to a particular one of the plurality of measurement assemblies by a first or second body portion of the subject. In another embodiment, the data acquisition and processing device is configured to construct a first virtual measurement assembly from a first subset of measurement assemblies and a second virtual measurement assembly from a second subset of measurement assemblies.