Fakülteler / Faculties
Permanent URI for this communityhttps://hdl.handle.net/11727/1395
Browse
3 results
Search Results
Item PET Studies in Epilepsy(2015) Sarikaya, Ismet; 0000-0002-1087-580X; 26550535; G-7881-2015Various PET studies, such as measurements of glucose, serotonin and oxygen metabolism, cerebral blood flow and receptor bindings are availabe for epilepsy. (18)Fluoro-2-deoxyglucose (F-18-FDG) PET imaging of brain glucose metabolism is a well established and widely available technique. Studies have demonstrated that the sensitivity of interictal FDG-PET is higher than interictal SPECT and similar to ictal SPECT for the lateralization and localization of epileptogenic foci in presurgical patients refractory to medical treatments who have noncontributory EEG and MRI. In addition to localizing epileptogenic focus, FDG-PET provide additional important information on the functional status of the rest of the brain. The main limitation of interictal FDG-PET is that it cannot precisely define the surgical margin as the area of hypometabolism usually extends beyond the epileptogenic zone. Various neurotransmitters (GABA, glutamate, opiates, serotonin, dopamine, acethylcholine, and adenosine) and receptor subtypes are involved in epilepsy. PET receptor imaging studies performed in limited centers help to understand the role of neurotransmitters in epileptogenesis, identify epileptic foci and investigate new treatment approaches. PET receptor imaging studies have demonstrated reduced C-11-flumazenil (GABAA-cBDZ) and F-18-MPPF (5-HT1A serotonin) and increased C-11-cerfentanil (mu opiate) and C-11-MeNTI (delta opiate) bindings in the area of seizure. 11C-flumazenil has been reported to be more sensitive than FDG-PET for identifying epileptic foci. The area of abnormality on GABAA-cBDZ and opiate receptor images is usually smaller and more circumscribed than the area of hypometabolism on FDG images. Studies have demonstrated that C-11-alpha-methyl-L-tryptophan PET (to study synthesis of serotonin) can detect the epileptic focus within malformations of cortical development and helps in differentiating epileptogenic from non-epileptogenic tubers in patients with tuberous sclerosis complex. O-15-H2O PET was reported to have a similar sensitivity to FDG-PET in detecting epileptic foci.Item Effects of Phenytoin and Lamotrigine Treatment on Serum BDNF Levels in Offsprings of Epileptic Rats(2016) Soysal, Handan; Dogan, Zumrut; Kamisli, Ozden; 26706181; AAL-4660-2020The role of brain-derived neurotrophic factor (BDNF) is to promote and modulate neuronal responses across neurotransmitter systems in the brain. Therefore, abnormal BDNF signaling may be associated with the pathophysiology of schizophrenia. Low BDNF levels have been reported in brains and serums of patients with psychotic disorders. In the present study, we investigated the effects of antiepileptic drugs on BDNF in developing rats. Pregnant rats Were treated with phenytoin (PHT), lamotrigine (LTG) and folic acid for long-term, all through their gestational periods. Experimental epilepsy (EE) model was applied in pregnant rats. Epileptic seizures were determined with electroencephalography. After birth, serum BDNF levels were measured in 136 newborn rats on postnatal day (PND) 21 and postnatal day 38. In postnatal day 21, serum BDNF levels of experimental epilepsy group were significantly lower compared with PHT group. This decrease is statistically significant. Serum BDNF levels increased in the group LTG. This increase compared with LTG + EE group was statistically significant. In the folic acid (FA) group, levels of serum BDNF decreased statistically significantly compared to the PHT group. On postnatal day 38, no significant differences were found among the groups for serum BDNF levels. We concluded that, the passed seizures during pregnancy adversely affect fetal brain development, lowering of serum BDNF levels. PHT use during pregnancy prevents seizure-induced injury by increasing the levels of BDNF. About the increase level of BDNF, LTG is much less effective than PHT, the positive effect of folic acid on serum BDNF levels was not observed. LTG increase in BDNF is much less effective than PHT, folic acid did not show a positive effect on serum BDNF levels. Epilepsy affects fetal brain development during gestation in pregnant rats, therefore anti-epileptic therapy should be continued during pregnancy. (C) 2016 Elsevier Ltd. All rights reserved.Item Evaluation of state and trait anxiety levels of parents and children before electroencephalography procedures: A prospective study from a tertiary epilepsy center(2020) Tekin, Leman Orgun; Cebeci, Dilek; Unver, Elif; Acar, A. Sebnem Soysal; Demir, Ercan; Gucuyener, Kivilcim; Dikmen, Asiye Ugrac; Serdaroglu, Ayse; Arhan, Ebru; 0000-0002-6533-8358; 32846305; AAJ-8714-2021Background: Inadequate or misinformation about electroencephalography (EEG) and epilepsy may lead to anxiety in children and their parents. The purpose of this study was to make a simultaneous evaluation of the anxiety levels of children and parents before EEG procedures and to make a brief assessment of their knowledge about EEG. Methods and materials: Children aged between 8 and 18 years who were referred for EEG tests at Department of Pediatric Neurology, Gazi University Faculty of Medicine. Ankara. Turkey and their parents were induded in the study, prospectively. Data were collected through Personal Information Forms; an EEG questionnaire form, which questioned the knowledge of the participants about EEG; the Spielberger's State-Trait Anxiety Inventory (STAI) to determine anxiety levels of the parents; and the State-Trait Anxiety Inventory for Children-State form (STAIC) to determine the anxiety levels of the children. The following parameters were collected in a database: demographic data about children and parents (sex, age), indication of suspected diagnosis on EEG request (i.e., the referral diagnosis), history of epilepsy, number of EEG recordings, and results of previous EEG recordings. The state and trait anxiety test results of the children were compared between the girls and boys, between age groups, and their parents' results in terms of both trait and state anxiety in terms of EEG, sex, ages, educational levels, and working. Results: Eighty-live children (mean age: 13.25 +/- 3.02 years) and 85 parents (mean age: 41.16 +/- 7.65 years) were included in the study. The children's mean trait anxiety score was 32.51 +/- 8.09, and the mean state anxiety score was 34.97 +/- 7.62. Half of the children who had a trait anxiety score of <= 30 points had increased state anxiety levels because they received more than 30 points in the state anxiety evaluation score. No significant differences were found between the boys and girls in terms of the state and trait anxiety scores (p > 0.05). The parents' mean trait anxiety score was 39.16 +/- 7.74, and the mean state anxiety score was 42.74 +/- 6.22. Forty (47%) parents were found to have trait anxiety, and 52 (61.2%) parents had state anxiety before the EEG. The trait anxiety score of the mothers was statistically significantly higher than that of the fathers (p < 0.01). The investigation of the knowledge level of both parents and children about EEG demonstrated some misunderstandings or points of insufficiency. Conclusion: The present study revealed that both parents and children had insufficient knowledge about EEG, and the procedure caused anxiety for both the parents and children. When EEG procedures are requested, parents and children should be given brief information about EEG and epilepsy. We think that in this way, the knowledge of both parents and children about this issue may be increased and their anxiety may be decreased. (C) 2020 Elsevier Inc. All rights reserved.