The principles of physiology / by John Augustus Unzer ; and A dissertation on the functions of the nervous system by George Prochaska ; translated and edited by Thomas Laycock.

  • Johann August Unzer
Date:
1851
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Licence: Public Domain Mark

Credit: The principles of physiology / by John Augustus Unzer ; and A dissertation on the functions of the nervous system by George Prochaska ; translated and edited by Thomas Laycock. Source: Wellcome Collection.

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    the ganglia are extinguished in the ganglia themselves? or whether being reflected there by a fixed law, they return again along the nerves to the parts to be moved? ‘The cele- brated Unzer,' and the eminent Winterl taught, that ex- ternal impressions are reflected in the ganglia, as they are reflected in the sensorium commune, and that the ganglia are special sensoria,—a doctrine which does not appear altogether destitute of probability. For, if we consider that the minute and invisible nerves disseminated over the internal membrane of the heart and auricles, perceive the stimulus of the inflowing venous blood,” and although they cannot transmit the impression of that stimulus to the sensorium commune through the ganglia of the intercostal [great sympathetic] nerve, yet communicate it to the motor nerves distributed through the substance of the heart [ventricles] and auricles, it follows that there is neces- sarily a consensus between the sensory nerves distributed on the inner membrane of the heart and the motor nerves dis- — seminated through the substance of the heart [ventricles] and auricles, which must take place either in the ganglia of the intercostal nerve or below them, in the communicating branches or plexuses of nerves. It seems probable, therefore, that besides the sensorium commune, which we conjecture to be in | the medulla oblongata, medulla spinalis, pons varolii, and crura of the cerebrum and cerebellum, there are special sensoria in the ganglia and plexuses of the nerves in which external im- pressions ascending along the nerves are reflected, that need not ascend all the way to the sensoriwm commune, to be reflected thence. 1 Erste Griinde einer Physiologie, &c. ? Haller, De Part. Corp. Hum. Fabr.
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