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Author: Natalia Curea Degree: doctor of biology Speciality:  03.00.13 - Human and animal physiology Year: 2005 Scientific adviser: Boris Melnic doctor habilitat, professor, Moldova State University Institution: Scientific council:

Status The thesis was presented on the 23 December, 2004 Approved by NCAA on the 27 January, 2005 Abstract – 0.37 Mb / in romanian

Summary

The results of the research done in the theoretical and practical fields of study show the degree of reactivation of the growing body under the influence of the educational stress and the suprainformation doze. The environment determines diverse extremes of action that train physiological reactions of adaptation. The main task of the research was getting to know the diversity of the amplitude of these reactions and the limits of maintaining the homeostazy of the teenage body. Along the research some aspects of the problem were investigated: psychoemotional, physiological etc. Dividing the experimental sample of 289 students was done based on the level of anxiety, temperament, neurotism, sex, age, nervous state.

The adaptive results are dependent on the nervous state and the endocrine of the researched person. Hipotalamo-hipophizar stimulation determines the hormonal adenohipophizar secretion, with answers upon the secretion of the suprarenal, tiroidian, gonadalian hormones. The neuro-endocrino-metabolico research of the cognitiv stress was tested with th help of:

• The dermal test of stress (determining the dhermal lactat as a final product of the glicolys through the photo-caloriemetrical method).
• The cardio-vascular tests (determining the pulse of the blodd pressure, calculating the vegetativ index, electro-cardiografical records).
• Neuronal tests (registering encephalic bioelectricity).
• The hormonal test (determining chemically the cortisol concentrate in saliva).
• Psycho-emotional tests (the IQ index, the level of the stabil and reactive anxiety, Spielberg, neurotism etc). It was concluded that the exam stress, supradozation of information leave deep effects upon the glucidic metabolism, determining overreacted concentrates of dhermal lactate. The cardio-vascular parameteres denote hyperpressure, arithmy, predisposition to sympatotonic effects and side-effects of trembling, skin redening, increasing the breathing frequency.

  The saliva cortisol, being determined through a irregular method increases the concentration depending upon the sex, age and temperament.The neuro-encephalic disturbances were determined by the hypovoltation of the alpha waves, with the diminuation of the capacity to adapt to sound and light reactions, hyperventilation, and of the cognitive proceses (attention, memory and motivation).The adequate neuro-endocrine reactions assure the resistence and the equilibrium0 of the body withoud harm and limited conditions. The level of adaptation of the teenagers has a genetic support, it is dependent on the intensity and the frequency of the stressful situations, and of the individual reactivity of the researched subject. The same stress agent will cause different answers at different persons, depending on the homeostatic equilibrium, body resistence and the socio-cultural environment.
  
  

Oficial Reviewers

• Lora Moşanu
  doctor
• Alexandru Mariţ
  doctor habilitat, professor

 Theses