User Manual

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Chapter 1 - Introduction
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Introduction
Central nervous system injuries often cause a gait disorder called foot drop
and related muscle weakness in the thigh. People who have foot drop are
unable to raise their foot while walking. They often drag their foot, resulting in
instability and increased effort during gait. In addition, they may experience
difficulty flexing or extending their knee.
The NESS L300 Plus System is intended to provide ankle dorsiflexion and
knee flexion or extension in people suffering from foot drop and thigh muscle
weakness following an upper motor neuron injury or disease. The NESS L300
Plus System incorporates cutting-edge technology and sophisticated design
features to improve gait and quality of life.
The NESS L300 Plus System consists of four main components:
• The NESS L300 Functional Stimulation (FS) Cuff with Radio Frequency
(RF) Stimulation Unit for the lower leg
• A Thigh FS Cuff with RF Stim Unit for the quadriceps or hamstrings
• A Gait Sensor
• An L300 Plus Control Unit
These components communicate wirelessly to send electrical pulses to the
nerves that control the muscles of the lower leg and thigh. When stimulated
at the appropriate phase of walking, the muscles raise the foot and extend
or flex the knee, and may improve gait.