[Reflection of state of hunger and its changes under the influence of meals in time structure of myoelectrical activity of esophageal-gastric sphincter and gastric in rabbits].
OBJECTIVE
To study the reflection of the state of hunger and its changes under the influence of food intake in temporal structure of myoelectrical activity of gastro-esophageal sphincter and stomach in rabbits.


METHODS
The registration of myoelectrical activity of gastro-esophageal sphincter and the stomach was performed in 10 rabbits subjected to daily food deprivation, before and after providing them powers ac DA-100 C and EMG-100 C (USA). Automatic analysis of temporal parameters of myoelectrical activity was monitored by the program AcqKnowledge (USA). Statistical analysis of the temporal parameters was performed using the program Statistica 6.


RESULTS
The condition of hunger is characterized by irregular periods of slow waves generated by the muscles of gastro-esophageal sphincter, the body and antrum, which is reflected in the structure of their temporal organization in the form of bimodal distribution of periods of slow waves. Under the conditions of food deprivation regular generation of slow waves with a frequency of 3.6 cycles/ min is observed only in the lesser curvature--stomach pacemaker zone, as evidenced by the monomodal character distribution of periods of slow waves. However, the ability of muscles of the lesser curvature to define the maximum frequency of generation of slow waves to other parts of the stomach under the conditions of hunger is not fully realized. Food intake reinforcement reduces the inhibitory effect of hunger motivational excitation on the activities of myogenic pacemaker of the stomach, allowing the muscles of the lesser curvature to define a maximal rhythm of generation of slow waves to the muscles of the body and antrum, as evidenced by the monomodal distribution of periods of slow waves. In a state of satiation the maximum frequency of generation of slow waves of myogenic pacemaker of the lesser curvature is acquired by muscles of gastro-esophageal sphincter.


CONCLUSIONS
The state of hunger and its change under the influence of food intake finds reflection in the specific structure of the temporal organization of the slow electrical activity of muscles of gastroesophageal sphincter and the stomach.
O Iu
OIu
Zenina
A A
AA
Kromin
D000818:Animals; D001683:Biological Clocks / Q000502:physiology*; D004435:Eating / Q000502:physiology*; D055724:Electrophysiological Phenomena; D049630:Esophageal Sphincter, Lower / Q000502:physiology*; D006815:Hunger / Q000502:physiology*; D011817:Rabbits