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Biomedical subjects

T P Shliafer

Publications and source records attributed to T P Shliafer.

At least 19 recordsLinked to original sources
PubMed1981

[Interaction of brain structures regulating the vocal and respiratory systems].

Unit activity data revealed an obvious interrelationship between the brain vocal and respiratory systems. Modification of evoked reaction of the vocal system depends on stimulated central nuclei and parameters of stimulating electric current. The threshold of evoked vocal reaction is higher than the threshold sufficient for modification of respiration and neuronal activity. The data obtained suggest that not all the structures related to the respiratory regulation bear control over the generation of species specific cries.

Animals↗
PubMed1979

[Analysis of species specific acoustic signals in the mesencephalic, diencephalic, and neostriatal structures of the brain].

In chronic experiments, the neuronal activity in structures of the auditory analyzer was studied during perception of species-specific signals in the chicken. The majority of the neostriatum cells responded to territorial vocalizations of the rooster and to squeaking of the chicken; in the midbrain structures the maximal responses occurred to signals of distress and alarm. The greatest number of cells responded most obviously to the cardinal component of the chicken vocalization spectrum.

Animals↗
PubMed1978

[Reactions of the neurons of midbrain and diencephalic structures during perception of acoustic signals and induced vocalization].

75% of the chick mesencephalic and diencephalic neurons changed their activity both on perception of acoustic stimuli (noise, frequencu-modulated tone, ecological stimuli) and at the emission of sound. The data obtained suggest that structures of the chick mesencephalon and diencephalon are involved in vocal reactions and have sound-sensitive neurons processing the acoustic information. The diencephalic neurons were found to have a higher specificity as compared with the mesencephalic cells.

Animals↗
PubMedDate not supplied

[Vocal reactions of chickens to midbrain stimulation with different electrical current parameters].

Vocal reactions of hens are realized via nucleus intercollicularis, nucleus mesencephalicus, nucleus isthmi (pars principalis magnocellularis), nucleus isthmi (pars principalis parvocellularis), formatio reticularis and other midbrain structures. These findings indicate a widespread representation of vocal centre in the midbrain of hens. Functional properties of these structures are different. Intercollicular and dorsal mesencephalic nuclei exhibit higher excitability as compared to isthmic nuclei and the reticular formation. Vocal reactions depend on the parameters of the electrical stimuli. The increase in the amplitude and frequency of stimulation facilitates vocal reaction and changes its pattern.

Animals↗
PubMedDate not supplied

[Participation of mesencephalic structures in vocal reactions].

Electrical stimulation and ablation of the midbrain structures in hens and one-day old chickens have revealed the structures (ICO, MLD, MLV, IPC and IMC) involved in the formation of vocal reactions. The paper outlines the functional characteristics of the structures and their dissimilarities which are determined by the type of their units. In the course of individual development of the hens, there is an increase of excitability and lability of the nervous processes in the examined structures.

Animals↗