9It has been reported that mechanical properties and stretch reflex
of spastic muscle differ from normal muscles.
Monosynaptic pathways provide an extremely rapid reflex feedback system and are the basis for the muscle stretch reflex
Shahzad Shamim from aga Khan University, hospital, Karachi talking about spasticity after Spinal cord injury (Sci) said that it increase the tonic stretch reflex
with exaggerated tendon jerks, clonus, and spasms, resulting from the hyper-excitability of the stretch reflex
Involuntary and sustained muscle contractions.
Neurophysiological methods for assessment of spasticity: The Hoffmann reflex, the tendon reflex and the stretch reflex
Interestingly, stretch reflex
responses evoked via directly-applied vibration are enhanced by muscle contractions (Burke et al.
Peripherally, muscle tone is modulated by muscle spindles, which are an integral component of the stretch reflex
and act to maintain posture and joint integrity via low-level, relatively static isometric contractions .
Changes in size of the stretch reflex
of cat and man attributed to aftereffects in muscle spindles.
Muscular contraction is also enhanced through irradiation and there is optimal facilitation of the stretch reflex
in a synergistic muscle group during movements within these patterns of movement (Knott, Voss, 1968).
In a narrow sense, spasticity is observed as an increased velocity-dependent response in the tonic stretch reflex
That is, depressed spinal stretch reflex
responses may be a required adaptation if dancers are to reach high levels of skill development.
Reduced stretch reflex
sensitivity and muscle stiffness after long-lasting stretch-shortening cycle exercise in humans.
Anything less than six seconds, such as a ballistic stretch, does not incorporate the Golgi tendon organ, but, rather, the stretch reflex