Prevalence and intensity of dentition defects and secondary deformations in the population of 15-40 age group.

Partial secondary adentia together with caries and parodont diseases is among the most widespread diseases of dentofacial system, correlated, in addition, to the number of lost teeth, with the age. Result in speech and chewing functions' disorders, change of face shape, esthetic and psychosocial inferiority, pathologies of digestive and other systems, formation of the chronic infection areas, changes of reactivity etc,. Improvement of the methods of prevention and treatment of the above diseases is one of the most significant problems in the dentistry.

[Iodine deficiency in the prenatal period may form learning ability deficiency in the postnatal period].

The present study analysis the changes in learning ability of the progeny of rats suffered from iodine deficiency. Reduction of serum thyroxin in the mothers' blood during three months before mating and whole period of gestation to an average level of 4,7+/-0,6 ng/ml, significantly worsened the learning ability in progeny, and the reduction to 1,1+/-0,4 ng/ml - completely deprived progeny's learning ability. Passage of the maze for these animals was purely probabilistic in nature without any signs of learning We can conclude that the diet with very low iodine content results in a low level of thyroxin in maternal serum and neurological deficiency in progeny manifested by learning disability during maze testing.

[Analgetic property of nonspecific thalamic nuclei].

Neruronal activity evoked by pain impulsation in the specific thalamic nuclei and sensorimotor cortex has been recorded in cat. The following data were obtained. Evoked nociceptive neuronal activity was inhibited by stimulation of the nonspecific thalamic nuclei.

[Effects of clopheline on impulse activity of neurons in the midbrain and dorsal horn of the spinal cord].

Clophelin (1-5 mg/kg) suppresses spinal dorsal horn neuronal nociceptive responses but does not change their touch stimuli reactions in unanesthetized curarized cats. This effect is steady to naloxone (1 mg/kg), yohimbine (5 mg/kg) and removal by prazosin (1 mg/kg). Clophelin depresses nociceptive responses of the central gray matter neurones which generalized pain impulses in the supraspinal structures.

[Effect of electroacupuncture on the activity of neurons in the central gray matter of the midbrain].

The effect of electroacupuncture in locally-segment and general analgetic points on background impulse activity of central gray substance neurons and their activity caused by nociceptive stimulation of the dental pulp, infraorbital nerve and forearm skin surface was studied in acute experiments on cats. It has been established that general analgetic points are better represented in the central gray substance, as compared to locally-segment points. Different degree involvement of central gray substance in the realization of acupuncture analgetic effect in different points is postulated.