Related Experiment Videos
Inhibition of the startle reaction by physostigmine in patients with early brain damage
1Neurologic Clinic, Masaryk University, Brno, Czechoslovakia.
Insights
Physostigmine and atropine affected EEG epileptic activity in children with early brain damage. Physostigmine inhibited startle reactions, suggesting cholinergic system involvement in brain damage.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Pharmacology
Background:
- Early brain damage in children can lead to neurological impairments, including startle reactions and epileptic activity.
- Cholinergic system dysfunction is implicated in various neurological disorders.
Purpose of the Study:
- To investigate the effects of physostigmine and atropine on startle reactions and EEG epileptic activity in children with early brain damage.
- To explore the role of the cholinergic system in the pathophysiology of these symptoms.
Main Methods:
- Studied 24 severely impaired children with early brain damage.
- Administered physostigmine and atropine to assess their impact on startle motor reactions and EEG paroxysmal activity.
- Categorized patients based on the presence or absence of a startle reaction.
Main Results:
- Physostigmine significantly inhibited the startle reaction in patients where it was present.
- Atropine had no significant effect on the startle reaction in either patient group.
- Physostigmine inhibited EEG epileptic paroxysmal activity, while atropine activated it in both groups.
- A cholinergic system disturbance was suggested as a contributing factor.
Conclusions:
- Findings suggest a cholinergic system disturbance in the pathophysiology of EEG paroxysmal activity in children with early brain damage.
- This cholinergic disturbance may also play a role in the development of startle reactions in this population.
- Physostigmine and atropine demonstrate differential effects on neurological symptoms in pediatric brain injury.
Abstract:
The influence of physostigmine and atropine on the startle reaction and EEG epileptic paroxysmal activity was examined in 24 severely impaired children with early brain damage. The startle motor reaction could be regularly evoked by tapping on the sternum in 12 of the patients. Physostigmine inhibited this reaction significantly, while atropine was without effect. In 12 patients without a previous startle reaction, atropine had a possible activating effect, however, the result was not significant. Physostigmine had no effect. The EEG paroxysmal activity was inhibited by physostigmine and activated by atropine in both groups of patients. A cholinergic system disturbance was suggested in the pathophysiology of the paroxysmal activity. The disturbance which is probably present in early brain damage, is presumed to be also involved in the genesis of the startle reaction.