Document Detail


Impulse coding of ramp currents intracellularly injected into pyramidal tract neurones.
MedLine Citation:
PMID:  6295796     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Relationships between the repetitive discharge and dynamic aspects of the input were analyzed in pyramidal tract neurones of the cat. Inputs were intracellularly injected currents reaching a steady level after ramps of different slopes (from 0.02 to 1.5 nA ms-1). Output was the instantaneous frequency of the discharge. During the transient phase, instantaneous frequency appeared to be related both to the velocity of rise and to the intensity of the stimulating current. The dynamic component of the cell response was estimated by subtraction of the intensity-bound component (derived from the steady-state response to current steps). After subtraction, the instantaneous frequency of interspike intervals following the first one became proportional to the ramp slope. The instantaneous frequency of the first interval also increased with the current slope, but at a lower rate than the frequency of other intervals. Moreover its dynamic component virtually stopped growing when the ramp slope exceeded 0.3-0.5 nA ms-1.
Authors:
F Baldissera; P Campadelli; L Piccinelli
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Experimental brain research     Volume:  48     ISSN:  0014-4819     ISO Abbreviation:  Exp Brain Res     Publication Date:  1982  
Date Detail:
Created Date:  1983-03-11     Completed Date:  1983-03-11     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  455-8     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Cats
Electric Stimulation
Evoked Potentials, Somatosensory
Muscles / innervation
Neurons / physiology
Pyramidal Tracts / physiology*
Somatosensory Cortex / physiology
Spinal Cord / physiology
Synaptic Transmission*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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