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Journal of Dairy Science Vol. 56 No. 3 395-398
© 1973 by American Dairy Science Association ®
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Sodium and Potassium Concentration of Brain and Dura Mater in Chronic Hypovitaminosis A of Calves1

S. R. Mikkilineni2, J. E. Rousseau, Jr., R. C. Hall, Jr., H. I. Frier and H. D. Eaton

Nutritional Sciences Department, University of Connecticut, Storrs 06268

ABSTRACT

In hypovitaminosis A of calves, elevated cerebrospinal fluid pressure characteristic of the deficiency could result in hydrocephalus and increased adrenocortical hormones altering distribution of sodium and potassium in brain. To investigate possible effects on brain as well as on the tentorium cerebelli portion of dura mater, 25 Holstein male calves averaging 54 days of age, 71 kg in weight, and 9.1 µg/100 ml in plasma vitamin A were fed one of four vitamin A intakes equivalent to 4, 16, 64, or 256 µg retinol/kg live weight/day for 16 wk. Increases in live weight were unaffected by vitamin A intake. Incidence of diarrhea and convulsions was greater in the group with 4 µg intake. Elevated cerebrospinal fluid pressures and occurrence of papilledema were inversely related to intake at 4 and 16 µg. Brain weights were less for the 4 µg intake but not on a live weight basis. Sodium and potassium concentrations of the right hemisphere of the brain did not differ among intakes of the vitamin; however, ash and sodium content of the dura mater of those calves with 4 µg intake tended to be greater than those of calves with the other three intakes.

FOOTNOTES

1 Scientific Contribution 520, Storrs Agricultural Experiment Station, University of Connecticut, Storrs. Supported in part by a Public Health Service Research Grant NS-02108 from The National Institute of Neurological Diseases and Stroke. Some of the statistics were calculated at The University of Connecticut Computer Center which is supported in part by a National Science Foundation Grant GJ-9.

2 Present address: 62 Baldwin Avenue, Jersey City, New Jersey 07306.






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Copyright © 1973 by the American Dairy Science Association ®.