Microstimulation in Different Parts of the Periaqueductal Gray Generates Different Types of Vocalizations in the Cat.

Journal of Voice : Official Journal of the Voice Foundation
Hari H SubramanianG Holstege

Abstract

In the cat four different types of vocalization, mews, howls, cries, and hisses were generated by microstimulation in different parts of the periaqueductal gray (PAG). While mews imply positive vocal expressions, howls, hisses, and cries represent negative vocal expressions. In the intermediate PAG, mews were generated in the lateral column, howls, and hisses in the ventrolateral column. Cries were generated in two other regions, the lateral column of the rostral PAG and the ventrolateral column of the caudal PAG. In order to define the specific motor patterns of the mews, howls, and cries, the following muscles were recorded during these vocalizations; larynx (cricothyroid, thyroarytenoid, and posterior cricoarytenoid), tongue (genioglossus), jaw (digastric), and respiration muscles (diaphragm, internal intercostal, external, and internal abdominal oblique). During these mews, howls, and cries we analyzed the frequency, intensity, activation cascades power density, turns, and amplitude analysis of the electromyograms (EMGs). It appeared that each type of vocalization consists of a specific circumscribed motor coordination. The nucleus retroambiguus (NRA) in the caudal medulla is known to serve as the final premotor interneuron...Continue Reading

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Citations

Feb 8, 2021·Journal of Voice : Official Journal of the Voice Foundation·Pamela Davis, Shi Ping Zhang
Mar 8, 2021·Journal of Voice : Official Journal of the Voice Foundation·Hari H SubramanianGert Holstege
Jul 1, 2021·Brain, Behavior and Evolution·Shreyas M SuryanarayanaSten Grillner

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