[Influence of mental and emotional stress on the levels of electrolytes in the saliva of senior schoolchildren].
Salivary Na+,K+-excretory function was studied in senior schoolchildren-entrants during an academic year and entrance examinations. The time course of changes in the salivary levels of Na+ and K+ in entrants during an academic year was undulating. In late October that is coincident with the beginning of lessons given by tutors, the salivary content of Na+ reduced while that of K+ increased. The second peak of decreased excretion rates for Na+ and increased excretion rates for K+ and that of less Na+/K+ ratios was observed in May on the eve of entrance examinations. On the eve of the examinations, 70% were observed to have tachycardia, elevated levels of integral parameters of cardiac rhythm regulation, a considerable reduction in the concentration of Na+, and an increase in the level of K+ with less Na+/K+ ratios. The pattern of the observed changes also retained in the postexamination period. On the eve of the examinations, 30% were found to have lowered levels of integral parameters of cardiac rhythm regulation and elevated levels of Na+. After an examination, there was a reduction in Na+ excretion which did not yet achieve the initial level. The mechanisms responsible for ionic shifts in the composition of saliva during psychoemotional stress are discussed.
S M
SM
Minasian
E S
ES
Gevorkian
A V
AV
Daian
G G
GG
Grigorian
G S
GS
Grigorian
D000293:Adolescent; D004521:Educational Measurement; D006339:Heart Rate; D006801:Humans; D011188:Potassium / Q000032:analysis* / Q000378:metabolism; D012463:Saliva / Q000737:chemistry*; D012621:Seasons; D012964:Sodium / Q000032:analysis* / Q000378:metabolism; D013315:Stress, Psychological / Q000378:metabolism / Q000503:physiopathology*; D013334:Students
D012964:Sodium; D011188:Potassium