V-Gait CAREN System:
The CAREN system is a state-of-the-art Computer Assisted Rehabilitation Environment Network that integrates traditional instrumentation of investigating posture and gait with a virtual reality environment (Motek ForceLink, Amsterdam, Netherlands).
Specific components include:
- Dual belt instrumented treadmill that can function in self-pace or predetermined speed mode. Two force plates are embedded under each belt. The treadmill can deliver perturbations in 2 degrees of freedom, pitch (± 10 degrees variable incline in walking direction), and fast sway (± 10 cm sideways perturbations).
- 180 cylindrical screen for visualization with 3 front projectors and custom driver to blend images
- CAREN software to control and synchronize all inputs and data collected
- Virtual reality environment scenes that can be controlled by the participant either through the force plates or by using reflective markers.
Motion Analysis System:
The CAREN system is integrated with a real-time digital motion capture system consisting of twelve 120-Hz infrared Eagle-4 cameras (Motion Analysis Corp, Santa Rosa, CA, USA) capable of realtime kinetics and integrated with extremity calculation software. The motion system is also capable of full integration with a Delsys electromeyographic system for surface or fine wire data collection.
Lower extremity resistance exercise occurs on a motorized, isokinetic ergometer (Eccentron™, BTE Technologies, Inc., Hanover, MD, USA). The Eccentron appears like a normal stepper ergometer with foot pedals that are driven by an electric motor.
Specific components include:
- Resist up to 750 pounds (3300 N) per leg
- Adjustable speed range from 12 to 48 reps per minute
- Low step-over height
- 22” HD touchscreen
- Easy to operate user-friendly software
- Adjustable seat comfortably accommodates clients from 4’8″ and (143 cm) to 6’8″ (203 cm)
- Treats clients with varying functional levels
Transcutaneous Stimulation of Nerve and Muscle Tissue:
The Digitimer High Voltage Stimulator model DS7A ( Digitimer, Hertfordshire, UK) provides constant current high voltage pulses of brief duration for transcutaneous stimulation during investigation of the electrical activity of nerve and muscle tissue. The output current is continuously variable over the range 0 to 100 milli-Amps, from a source voltage continuously variable from less than 100 Volts to 400 Volts, to meet the requirements of human pathological cases. Short pulse durations have been made available to minimize any discomfort to the subject. The pulse duration can be varied from 50 microseconds to 2 milli-seconds in six steps and a specially designed isolated output stage maintains a square (current) pulse shape while minimizing stimulus artifacts.
The ETG 2.5w mobile eye tracking system (SensoMotoric Instruments, Boston, MA, USA) consists of lightweight, portable, binocular eye tracking glasses instrumented with 3 digital high-resolution cameras that record the scene and eye movements at 60 Hz. The cameras have a 60° horizontal and 46° vertical field of view (FOV). The glasses are controlled via wireless connection to a laptop, or by a small recording device in a pack on the participant’s back.
BioSway Balance Testing System:
The BioSway (BioDex Corp., Shirley, NY, USA) is a lightweight instrumented platform with a high-resolution color touch-screen display. The system offers interactive teaching modes or standardized testing environments including the Clinical Test of Sensory Integration of Balance (CTSIB) and various other tests of postural stability. The platform is capable of supporting up to 500 lbs.