Introduction During stroke recovery, flaccidity is usually of short duration and is followed by a stage of motor behavior in which

In a standing position with added vestibular inputs, stroke subjects showed little evidence of the classic abnormal synergy patterns in seven of the eight directions tested. suitable for robot-assisted movement treatment for reducing abnormal synergies. -Motor recovery from a stroke involves flaccidity, spasticity, then isolated movement-The abnormal synergy patterns occur during the spasticity phase of recovery-When the pt. Background. The findings here suggest that the primary contributor to lower limb motor deficits in chronic stroke subjects is weakness, which is at least partially due to co-contraction of antagonistic muscles. Although the majority of stroke patients achieve an independent gait, many do not reach a walking level that enable them to perform all their daily activities. has spasticity and moves actively, an abnormal synergy pattern will appear.-The abnormal synergy patterns are not functional Thus the patient is unable to perform an isolated movements of a single limb segment without producing movements in the remainder of the limb. Gait recovery is a major objective in the rehabilitation program for stroke patients. The abnormal synergy seen in patients after stroke is considered to limit the ability of these patients. Patients fully recovering from stroke are thought to gradually develop more complex motor behaviors, fully integrating voluntary movement patterns outside of stereotypical abnormal synergy patterns. The goal of the present study is to examine whether gravity compensated training improves unsupported arm function. Hemiplegia is one of the most common impairments after stroke and contributes significantly to reduce gait performance. However, in the lower extremity, antigravity torque generation rather than precise movement is needed for functions such as sit-to-stand movement and gait. Two distinct abnormal synergy patterns have been described for each extremity : flexion and extension synergy.
Abnormal and highly stereotyped obligatory synergies emerge with spasticity following stroke . Keywords: Stroke, Abnormal synergies, Treatment, Upper limb, Rehabilitation robot 1. They are described as either a flexion synergy or an extension synergy and affect both the upper and lower extremity (see below). abnormal synergy patterns with a sequential pattern of motor recovery (6 stages) Following a stroke patients in stage 1 of sequential motor recovery will have flaccidity: NO voluntary or facilitated movement (NO associated reactions) of the limbs