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1 PETER PAZMANY CATHOLIC UNIVERSITY SEMMELWEIS UNIVERSITY Development of Complex Curricula for Molecular Bionics and Infobionics Programs within a consortial* framework** Consortium leader PETER PAZMANY CATHOLIC UNIVERSITY Consortium members SEMMELWEIS UNIVERSITY, DIALOG CAMPUS PUBLISHER The Project has been realised with the support of the European Union and has been co-financed by the European Social Fund *** **Molekuláris bionika és Infobionika Szakok tananyagának komplex fejlesztése konzorciumi keretben ***A projekt az Európai Unió támogatásával, az Európai Szociális Alap társfinanszírozásával valósul meg TÁMOP /2/A/KMR

2 Peter Pazmany Catholic University Faculty of Information Technology BEVEZETÉS A FUNKCIONÁLIS NEUROBIOLÓGIÁBA INTRODUCTION TO FUNCTIONAL NEUROBIOLOGY By Imre Kalló Contributed by: Tamás Freund, Zsolt Liposits, Zoltán Nusser, László Acsády, Szabolcs Káli, József Haller, Zsófia Maglóczky, Nórbert Hájos, Emilia Madarász, György Karmos, Miklós Palkovits, Anita Kamondi, Lóránd Erőss, Róbert Gábriel, Zoltán Kisvárdai, Zoltán Vidnyánszky TÁMOP /2/A/KMR

3 Wake-sleep cycle Imre Kalló & György Karmos Pázmány Péter Catholic University, Faculty of Information Technology I. The circadian rhythm II. Physiological characteristics of the sleep stages III. Brain mechanisms responsible for the wake-sleep cycle IV. Sleep disturbance TÁMOP /2/A/KMR

4 Physiology of the wake-sleep cycle The circadian rhythm Physiological characteristics of the sleep stages Brain mechanisms responsible for the wake-sleep cycle Sleep disturbance Rhytmic functions of the living organisms: heart beat, respiration, brain waves, periods, reproductive cycle, migration cycle, etc. Internally or externally driven rhythms : circadian rhythm, lunar rhythm, seasonal rhythm Internal clock-driven, synchronised rhythm (Zeitgeber) TÁMOP /2/A/KMR

5 Circadian fluctuations of human physiology CIRCADIAN RHYTHM Synchronising factor: light-dark cycle Circadian rule: diurnal animals: light intensity increase, wake/sleep ratio increases nocturnal animals: light intensity increase, wakesleep ratio decrease TÁMOP /2/A/KMR

6 Shift of the human circadian rhythm in isolated environment Activity cycle: 33,2 h Temperature cycle: 24,8 h TÁMOP /2/A/KMR

7 Activity rhythm of rats before and after SCN lesion NUCLEUS SUPRACHIASMATICUS SCN lesion GLU: glutamate GRP: gastrin-releasing peptide AVP: arginine vasopressin VIP: vasoactive intestinal peptide CAR: calterinin NPY: neuropeptide Y NA: noradrenaline 5HT: serotonin TÁMOP /2/A/KMR

8 Regulation of melatonin secretion in rat TÁMOP /2/A/KMR

9 Physiology of the wake-sleep cycle The circadian rhythm Physiological characteristics of the sleep stages Brain mechanisms responsible for the wake-sleep cycle Sleep disturbance TÁMOP /2/A/KMR

10 Sleep stages on the EEG Stages of slow wave sleep: 1.stage: low amplitude, fast activity, with a few theta wave 2-5% of sleeping time 2. stage: theta waves, Hz sleeping spindles 45-55% of sleeping time 3. stage: high amplitude theta and delta waves, 20-50% of waves >75 μv 5-10% of sleeping time 4. stage: high amplitude delta waves, 20% of waves >75 μv 15-20% of sleeping time TÁMOP /2/A/KMR

11 Operational pattern of thalamic relay cells in awake state and during slow-wave sleep TÁMOP /2/A/KMR

12 Stages of sleep during night sleep TÁMOP /2/A/KMR

13 Characteristics of NREM and REM sleep TÁMOP /2/A/KMR

14 Typical sleep phases in the cat TÁMOP /2/A/KMR

15 Ponto-Geniculo-Occipital (PGO) waves in REM sleep TÁMOP /2/A/KMR

16 Age-dependent characteristics of sleep cycles TÁMOP /2/A/KMR

17 Age-dependent characteristics of sleep cycles TÁMOP /2/A/KMR

18 Dream report-lengths during NREM and REM phases TÁMOP /2/A/KMR

19 Proportion of sensory modalities in dream reports VISION = 100% TÁMOP /2/A/KMR

20 Effect of deprivation of REM sleep TÁMOP /2/A/KMR

21 Active and inactive brain regions in REM sleep: results of PET studies TÁMOP /2/A/KMR

22 Physiology of the wake-sleep cycle The circadian rhythm Physiological characteristics of the sleep stages Brain mechanisms responsible for the wake-sleep cycle Sleep disturbance TÁMOP /2/A/KMR

23 Theories of wake-sleep regulation Passive hypothesis basic state is sleep must find a waking center Active hypothesis basik state is awake, which is inhibited must find a sleeping center Chemical factors (adenosine, interleukin-1, TNFα) Center theories Effect of sleep deprivation NREM days REM 16 hours TÁMOP /2/A/KMR

24 EEG effects of brainstem transsections (Bremer ) ENCEPHALE ISOLÉ CERVEAU ISOLÉ TÁMOP /2/A/KMR

25 Sleep evoked by low frequency stimulation of the thalamus Walter Rudolf Hess TÁMOP /2/A/KMR

26 Effect of brainstem lesions (Moruzzi and Magoun, 1949) TÁMOP /2/A/KMR

27 Reticular activating system TÁMOP /2/A/KMR

28 Deep brain single cell activities during sleep phases TÁMOP /2/A/KMR

29 Postulated mechanism of REM atonia TÁMOP /2/A/KMR

30 Elements of the brainstem activating system TÁMOP /2/A/KMR

31 Projections of the ventrolateral preoptic nucleus TÁMOP /2/A/KMR

32 Projections of the orexin neurons TÁMOP /2/A/KMR

33 Function of the neurons participating in the regulation TÁMOP /2/A/KMR

34 Transmitter systems participating in the regulation TÁMOP /2/A/KMR

35 Model of the wake-sleep regulation TÁMOP /2/A/KMR

36 Physiology of the wake-sleep cycle The circadian rhythm Physiological characteristics of the sleep stages Brain mechanisms responsible for the wake-sleep cycle Sleep disturbance TÁMOP /2/A/KMR

37 International classification of sleep disturbances TÁMOP /2/A/KMR

38 Effect of sleep pill deprivation TÁMOP /2/A/KMR

39 Effect of travelling through several time zones TÁMOP /2/A/KMR

40 Biological rhythms and the brainstem biological clocks TÁMOP /2/A/KMR

41 Relationship between sleep and respiration OBSTRUKTIVE SLEEP APNEA SYNDROME OSAS Continuous Positive Airway Pressure CPAP TÁMOP /2/A/KMR

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