Accession Number : AD0786804

Title :   Bipotentials of Reticular Structures in Response to Repetitive Acoustic Stimuli,

Corporate Author : ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA

Personal Author(s) : Kotlar,B. I. ; Zubova,O. B. ; Timofeeva,N. O.

Report Date : 13 MAY 1974

Pagination or Media Count : 17

Abstract : Frequency changes in synchronized activity during extinction of orienting reaction to acoustic stimuli were studied in 18 unrestrained adult rabbits, with permanently implanted bipolar electrodes in the rostro-lateral midbrain reticular formation, oral-recticular nucleus of the pons and nonspecific thalamic nuclei. The dynamics of rhythm frequency in these structures was characterized by great diversity, due to several factors, stimulus intensity, individual characteristics of the animal and its functional state. All the changes are classified into three types of frequency dynamic: gradual increase in frequency, gradual decrease and two maxima in response to the first stimuli and after several stimulations. Type I was recorded at sound intensities of up to 65 dB. At greater intensities, EEG changes in the rostral nonspecific structures were mostly Type II (midbrain) and Type III (thalamus).

Descriptors :   *Brain, *Reticular formation, *Electroencephalography, *Acoustic signals, Cerebral cortex, Stimuli, Central nervous system, Response(Biology), Psychophysiology, USSR, Translations, Rabbits, Experimental data

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE