Accession Number : ADA024092


Title :   Persistent Increases in Membrane Resistance of Neurons in Cat Motor Cortex.


Descriptive Note : Scientific rept.,


Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD


Personal Author(s) : Woody,C. D. ; Carpenter,D. O. ; Gruen,E. ; Knispel,J. D. ; Crow,T. W.


Report Date : FEB 1976


Pagination or Media Count : 34


Abstract : The effect of various experimental procedures on membrane resistance was assessed in a total of 85 neurons in the coronal-pericruciate cortex of awake cats. Iontophoretic application of acetylcholine (ACh) extracellular to recorded cortical neurons was followed by transient increases in membrane resistance (Rm) in one-third of the encountered neurons. Pairing extracellular iontophoresis of ACh with concomitant intracellular current injection sufficient to repeatedly discharge the neuron led to persistent increases in cells that responded to ACh with an increase in RM. Rm was not increased if saline was substituted for ACh or if the neuron was only discharged repeatedly. Pairing extracellular iontophoresis of ACh with current injection just insufficient to repeatedly discharge the neuron prolonged the transient increase in Rm to ACh, but Rm eventually returned to base-line levels.


Descriptors :   *NERVE CELLS, *RESISTANCE(BIOLOGY), *CEREBRAL CORTEX, MEMBRANES(BIOLOGY), STIMULATION(PHYSIOLOGY), ELECTRICITY, ELECTRICAL RESISTANCE, ELECTROPHYSIOLOGY, ACETYLCHOLINE, CATS.


Subject Categories : MEDICINE AND MEDICAL RESEARCH


Distribution Statement : APPROVED FOR PUBLIC RELEASE