RESUMO
Background: The objective is to evaluate the anticonvulsant activity of nitrendipine in seizure-induced mice. Methods: Albino mice (25-30 g) of either sex were randomly selected and divided into four groups of six mice each. After overnight fasting, Group I received 0.25 ml of propylene glycol and served as the control, Group II received valproic acid (110 mg/kg orally) as standard, Groups III received 5 mg/kg of nitrendipine and 100 mg/kg of valproic acid, Group IV received 5 mg/kg of nitrendipine and 75 mg/kg of valproic acid, and Group V received 5 mg/kg of nitrendipine and 50 mg/kg of valproic acid all of which were administered orally 60 mins prior to the test in this acute study. The anticonvulsant activity was screened using maximal electroshock (MES) model and pentylenetetrazole (PTZ) model. Results: The nitrendipine showed a considerable reduction in the duration of hindlimb extensor phase in MES model and also delayed the latency of seizures induced by PTZ when compared with control group. The probable mechanism of anticonvulsant action of nitrendipine could be due to its interference with the gamma amino butyric acid type aminergic mechanism, modulation of nicotinic, and N-methyl-D-aspartate receptors. Conclusion: Nitrendipine possesses the anticonvulsant activity and has a beneficial role in epilepsy.
RESUMO
Pseudoaneurysms of the extracranial Internal Carotid Artery (ICA) are rare. Here it is reported a case of posttraumatic extracranial ICA pseudoaneurysm in a three-year-old boy. The pseudoaneurysm arising from the extracranial ICA was initially diagnosed by DSA. Later on confirmed by Doppler and MRA. The imaging features are described with a brief review of literature.