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[Changes in the monosynaptic reflex during wakefulness and sleep of children with cerebral paralysis].

Changes of the H reflex during sleep were studied in 13 children with cerebral palsy (8 with spastic tetraplegia, 2 with a mixed form of cerebral palsy without spasticity, 3 with hypotonic diplegia or tetraplegia). These modifications were compared with those of 5 normal children of the same age. During repeated night recordings, responses in the calf muscle elicited by electrical stimuli to the posterior tibial nerve were studied at the same time as the EEG, EOG and EMG of the mental muscles. The results show that:--in normal children the max H reflex progressively decreases in amplitude from wakefulness to REM sleep; -- in spastic patients there is only a slight decrease in the H reflex in NREM sleep and no significant change in REM sleep; the amplitude of the H reflex is always greater than that in the control group; -- in the dystonic and hypotonic group the results obtained are similar to those of the control group. From these results one may draw the conclusion that in spastic patients as opposed to the control, dystonic and hypotonic groups, normal balance between the function of supraspinal systems regulating the amplitude of the spinal reflexes is alterated probably through the scarce functionality of the supraspinal inhibitory structures.

Cerebral Palsy↗