Leukoaraiosis is a change in brain white matter with characteristic manifestation in MR and CT head scans. Common leukoaraiosis risk factors include aging and arterial hypertension. A quarter of symptomatic ischemic infarcts belongs to small blood vessel disease group and could be presented as lacunar infarcts. These two crucial pathophysiological mechanisms are in the root of cognitive dysfunction related to small blood vessel disease. 60 lacunar infarct patients were examined and parameters for groups with and without leukoaraiosis were determined. It was found that leukoaraiosis incidence was highest in the group of women older than 70. Neurological assessment was scored on NIH-NINDS scale, functional status was scored with Barthelo index, and cognitive status was determined using Mini Mental State Examination (MMSE) and Alzheimer Disease Assessment Scale Late (ADAS-L). Correlation analysis of these parameters on significance level of *p<0.05, **p<0.01, suggests decrease in neurological status and cognitive performance.

One of the best-studied responses of cognitive evoked potentials is a so-called “P300”, the late positive wave complex that occurs about 300-500 ms after the stimulus. It is obtained when the subject’s attention is focused on a signal that is rare, especially if the signal has a motivational or emotional meaning. In the study of P300 potential, we followed the variations of potential amplitude and latency, so the objective was to examine whether there is a difference in Fz and Cz amplitudes of auditory induced cognitive evoked P300 potential depending on the performance of oddball tasks, both in male and female subjects. The study included 60 subjects (30 female respondents and 30 male respondents). P300 potential is induced by the auditory "oddball" paradigm with 80% of non-target and 20% of target stimuli that are presented to the patient through headphones. The target tones are high tones of 2000 Hz. The standard, 1000 Hz tones the respondent should ignore but when he hears the target tones the respondent should press the button on the special handle. The value of Fz and Cz amplitudes both in male and female subjects obtained in the classical "oddball" paradigm when the subject reacted to the signal by pressing the key with the dominant (right) arm were statistically significantly lower (p>0,05) than the values of Fz and Cz amplitudes obtained when the key was pressed by the non-dominant hand. Based on this experiment it can be concluded that both in male and female subjects the performance of oddball tasks does not affect the amplitude of P300 cognitive evoked potentials.

Uz tradicionalne faktore rizika smatra se da i inflamacija doprinosi nastanku ishemičnog moždanog udara (IMU). U toku inflamacije neutrofilni leukociti se degranulišu, kada može doći do oslobađanja njihovog enzima mijeloperoksidze (MPO) u ekstracelularni prostor. Osim peroksidazme MPO poseduje i hlorinišuću aktivnost kojom stvara hipohlornu kiselinu i dugoživeće oksidanse hloramine. U ovoj studiji je određivana hlorinišuća aktivnost MPO i koncentracija ukupnih hloramina u serumu. U studiju je bilo uključeno 29 pacijenata sa akutnim IMU, starosti 69.0 godina (64.2–78.0), i 25 ispitanika kontrolne grupe bez IMU, starosti 69.0 godina (67.0–72.0). Nađeno je da je u grupi sa IMU broj neutrofilnih leukocita u perifernoj krvi značajno veći od kontrolnih vrednosti (4.56±1.76 vs. 7.74±3.35 × 109/L, u kontrolnoj grupi i kod pacijenata; p<0.05). Takođe je i hlorinišuća aktivnost MPO seruma bila veća u grupi sa IMU (67.2 U/L vs. 92.3 U/L, kod kontrole i kod pacijenata; p<0.05). Iako je koncentracija ukupnih hloramina bila nešto veća kod IMU nego u kontrolnoj grupi, razlika nije bila statistički značajna (p=0.178). Aktivnost MPO je značajno korelirala sa koncentracijom triglicerida (p<0.05). Korelacija između hlorinišuće aktivnosti MPO i ukupnih hloramina nije bila značajna (p=0.402), dok su korelacije MPO aktivnosti i broja neutrofila (p=0.071) odnosno MPO aktivnosti i prisustva aritmije (p=0.094) bile nešto veće. Rezultati ove studije ukazuju da MPO verovatno ima ulogu u patogenezi IMU, što se delimično može zasnivati na hlorinaciji biološki značajnih molekula vaskularnog kompartmana.

Aterogeneza je postepen proces koji započinje u ranom životnom periodu, odvija se lagano, decenijama i može biti prepoznat tek kada se razviju infarkt srca, mozga ili periferna vaskularna bolest. Cilj istraživanja bio je da se utvrdi učestalost i zastupljenost faktora aterogeneze kod pacijenata sa moždanim infarktima u graničnoj supratentorijalnoj arterijskoj distribuciji. Istraživanje je sprovedeno u sedmogodišnem periodu, kod 30 bolesnika, kao prospektivna studija. Kao faktori aterogeneze definsisani su pacijenti sa kardiovaskularnim oboljenjima, dijabetes mellitusom i pušači, a kod svih ispitanika verifikovana je koncentracija holesterola. U grupi ispitanika sa infarktom moždanog tkiva u prednjim partijama, u odnosu na bolesnike sa moždanim infarktom u zadnjim partijama, utvrđen je statistički značajno veći broj bolesnika sa kardiovaskularnim bolestima (p=0,025). Grupa pacijenata kod kojih je utvrđen infarkt moždanog tkiva u prednjim partijama imaju značajno veći broj bolesnika sa diabetes mellitusom (p=0,023), veći broj pušača (p=0,021), a utvrđena je i statistički značajno veća koncentracija holesterola (p<0,0001). Pacijenti sa prednjim moždanim infarktom imaju statistički značajno veći aterogeni potencijal.

Epidemiological characteristics of acute stroke certify the great importance of such disease, which takes the measures of a mass incontagious illness, because it represents one of leading causes of death and invalidity in the world. Contemporary knowledge about the complexity of cerebral infarct has been significantly increased thanks to new imaging methods, which allows correction of clinicaly stated diagnose. The aim of our research was to determine clinical manifestation signs of supratentorial infarcts and their presence compared to anatomic localisations of lesions. 60 patients were clinicaly tested, and a computerised tomografy of brain followed, which disclosed anatomic localisation of lesions. Results have shown that the maniestation of supratentorial infarct in the AMC zone has the most neurological signs, from conscious state disorders, graver pyramid deficit, speaking disorder to hemihypesthesia and hemianopsys. Lighter neurological deficit is found in infarcts which affect AAC and APC zones, which brings to a conclusion that knowing the clinical state and without applying neuroradiological methods can imply to localisation of supratentorial infarcts.

One of leading causes of death in the world is stroke, more often it strikes population under the age of 65, and those who survive it are left with a maximum degree of invalidity. Supratentorial infarcts are the most common form of ACM, occuring as a consequence of blood vessel occlusion, which irrigation zone is above tentorium, and it appears in 80% of infarcts. Diagnosing of such infarcts is based on clinical and neuroradiological parameters, and computed tomografy is called "gold standard". Therefor, our goal was to introduce a CT parameters, which follow complications of supratentorial infarcts and have predictional character. A prospective study followed the state of 60 patients with supratentorial infarcts of brain, performed CT diagnostics, established infarct complication parameters and their effects on clinical state and diseases outcome. Large tentorial infarcts in ACM vascularisation zone, mass-effects and mediosagital structure motions are significant predictors of infarct ill outcome when it comes to surviving and functional recovery.