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Changes of intracerebral activity during stimulation of the chest trigger zone according to the Vojta principle
Martínek, Milan ; Pavlů, Dagmar (advisor) ; Angerová, Yvona (referee) ; Řasová, Kamila (referee)
Title: Changes of intracerebral activity during stimulation of the chest trigger zone according to the Vojta principle Objective: The aim of this study is to examine whether stimulation of the chest trigger zone according to the Vojta principle results in changes of the brain electrical activity in the primary and secondary motor cortical areas evaluated in the sLORETA program. Methods: Seventeen healthy women aged 20-30 (25 ± 6.4) were involved in the experiment. Registration of the scalp EEG was performed with a special EEG cap. EEG was measured in all individuals with eyes closed in order to reduce ocular artifacts and to reduce visual afferentation. EEG activity was registered for 5 min at rest (PRE CE) prior to the actual reflex locomotion stimulation. Subsequently, the electrical activity was followed for 15 min during chest trigger zone stimulation (VOJTA CE). The experiment was terminated with the registration of the resting EEG recording until 5 min after the reflex locomotion stimulation of the trigger zone (POST CE). The obtained data were then statistically compared in the sLORETA program using a pairwise t-test with logarithmic transformation of the aliasing parameter 0,5 with permutation method using 5000 randomizations at the significance level p ≤ 0,05 with correlation for repeated...
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Cerebral projection of haptic contact via sLORETA imaging
Dubová, Dita ; Pánek, David (advisor) ; Pavlů, Dagmar (referee)
Title: Cerebral projection of haptic contact via sLORETA imaging Objectives: The aim of this work is to evaluate changes in intracerebral source activity via sLORETA imaging during haptic stimulation of hands, while this contact is modified by a mirror illusion in comparison to calm state with open eyes. The work seeks to specify localization of such activity. Methods: Ten healthy volunteers aged 23-42 participated in the experiment. The electrical brain activity was detected with scalp EEG. The experiment was divided in 5 phases. First we measured the brain activity during calm state with open and with closed eyes, each for 5 minutes. Afterwards the subjects were seated at a table with a mirror occluding their right hand and reflecting their left hand. The brain activity was than recorded during 4 modifications of the experiment in duration of 2 minutes each. The first modification contained symmetrical haptic contact on both hands, modification 2 involved stimulation on the left hand only, during modification 3 the stimulus was applied on the right hand only and modification 4 had no tactile stimulus on neither side. The order of modifications for each individual was randomized. The EEG data were converted into sLORETA program, which allows to localize the source of the recorded brain activity...
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Prolonged apnea: monitoring brain activity in freedivers
Skopalová, Pavla ; Pánek, David (advisor) ; Nováková, Tereza (referee)
Title: Prolonged apnea: monitoring brain activity in freedivers Objectives: The aim of this study is to monitor the brain electrical activity during the prolonged apnea in freedivers. Prolonged apnea in the water and prolonged dry apnea were compared to each other and also to a resting state before the apnea, all states with the eyes closed. Brain activity was obtained from the scalp EEG and evaluated using the sLORETA program. Methods: The research was conducted in 11 healthy men at the age of 23 - 51. The data was obtained from the scalp EEG. The record was first taken at a resting state before the apneas with eyes closed, then at maximum prolonged dry apnea with eyes closed and finally at maximum prolonged apnea in the water with eyes closed. The lenghts of the prolonged apneas ranged from 2:15 minutes to 5:30 minutes in idividual probands. There were pauses of at least three minutes between each apnea as by the proband's needs. The compared pair groups were following: prolonged apnea in the water against prolonged dry apnea, prolonged apnea in the water against resting state before the apnea and finally prolonged dry apnea against resting state before the apnea, all with the eyes closed. Selected sections of EEG record without artefacts were processed by sLORETA program. In the statistical...
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