Pathological changes in the epileptogenic foci of children with intractable epilepsy / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To investigate pathological changes in the epileptogenic foci of children with intractable epilepsy and their clinical significance.</p><p><b>METHODS</b>Thirty children with intractable epilepsy were included in the study. The epileptogenic foci were surgically resected and pathological changes in the obtained specimens were observed under a light microscope (LM) and a transmission electron microscope (TEM).</p><p><b>RESULTS</b>Under the LM, cortical dysplasia was found in 14 cases (47%), hippocampal sclerosis in 11 cases (37%), dysembryoplastic neuroepithelial tumor in 1 case (3%), ganglioglioma in 1 case (3%), and encephalomalacia in 3 cases (10%). The TEM observation revealed pathological changes in the ultrastructure of the hippocampus and extra-hippocampal cortex, such as changes in the number of synapses and synaptic structure, decrease in neurons and karyopyknosis, swelling and degeneration of astrocytes, and changes in mitochondrial structures.</p><p><b>CONCLUSIONS</b>Pathological changes in the hippocampus and extra-hippocampal cortex, especially synaptic remodeling, may be the morphological basis for spontaneous recurrent seizures in children with intractable epilepsy. The pathological changes and epileptiform activity are related to an imbalance between excitatory and inhibitory neurotransmission.</p>

Multivariate Analysis of Influential Factors for Loss of Neuron in Ammonias by Detection of Proton Maganetic Resonance in Children with Temporal Epilepsy / 实用儿科临床杂志

2 years),seizure frequency(≥1 time/month),persistence time(≥60 s),gene-ralized seizure were all associated with the incidence of the loss of neuron in ammonias.Multivariate Logistic regression analysis showed that the independent influencital factors for the loss of neuron in ammonias in children with temporal epilepsy included seizure frequency,persis-tence time and tape of seizure. Conclusions The loss of neuron in ammonias though 1H-MRS can be detected.The results of multivariate analysis verify that the development of the loss of neuron in ammonias may be associated with many factors including age of onset,course of di-sease,seizure frequency,persistence time and generalized seizure.In order to lower the incidence of the loss of neuron,early intervening treatment is very important.

Effects on neuronal ultrastructure and nervous system of monkey after selective cerebral profound hypothermia and blood flow occlusion / 中华外科杂志

<p><b>OBJECTIVE</b>To study the effects of deep hypothermia on the neuronal ultrastructure and nervous system of monkey after selective cerebral profound hypothermia and blood flow occlusion.</p><p><b>METHODS</b>Brain-local extracorporeal circulation was established by right internal carotid artery deep hypothermic perfusion and homolateral external jugular vein backflow, brain blood flow was recovered from circulatory arrest 60 - 80 minutes late and monkey came back naturally.</p><p><b>RESULTS</b>In all 7 monkeys, 5 were succeeded in being build up the models except for 2 because of technic problems, and 4 of them lived up for ever. The function of nervous system grade, essential organ and neuronal ultrastructure were normal.</p><p><b>CONCLUSION</b>Selective cerebral profound hypothermia can increase the ability of brain to endure hypovolemia and hypoxidosis and prolong the time of blood flow occlusion.</p>