Abstract
A special integrating ultramicroflame photometer was used to investigate potassium and sodium ion concentration in Pacinian corpuscular fluid. Its sensitivity is 1×10−14 M for potassium ions and 1×10−13 M for sodium ions. Analyses showed that [K+] in Pacinian corpuscular fluid (6. 19±0. 72 meq/liter) is 3. 41±0. 61 meq/liter greater than in cats' blood plasma (2. 78±0. 38 meq/liter). No statistically significant differences were found in the sodium ion concentration in the corpuscular fluid and blood plasma. From the results an attempt is made to explain the genesis of the post-hyperpolarization responses of Pacinian corpuscles and some of the morphological features of these receptors. Specialization of mechanoreceptors and the possible role of the specific medium surrounding these sensory structures are discussed.
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Il'inskii, O.B., Krasnikova, T.L. Changes in ionic composition of Pacinian corpuscular fluid with activity. Neurosci Behav Physiol 5, 297–305 (1972). https://doi.org/10.1007/BF01183102
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DOI: https://doi.org/10.1007/BF01183102