-transparent.png){kind=logo}
The carotid body impulse generator has been previously characterized as a Poisson-type random process. We examined the validity of this characterization by analyzing sinus nerve spike trains for interspike interval dependency. Fifteen single chemoreceptive afferents were recorded in vivo under hypoxic-hypercapnic conditions, and approximately 1,000 consecutive interspike intervals for each fiber were timed and analyzed for serial dependence. The same set of intervals placed in shuffled order served as a control series without serial dependence. The original spike interval trains showed significantly negative first-order serial correlation coefficients and less variability in joint interval distributions than did the shuffled interval trains. These results suggest that the chemoreceptor afferent train is not random and may reflect a negative feedback system operating within the carotid body that limits variation about a mean frequency.
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
January 1996,
Advances in experimental medicine and biology,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
March 1995,
Chaos (Woodbury, N.Y.),
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
January 2006,
Journal of neuroscience methods,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
January 1994,
Advances in experimental medicine and biology,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
July 1966,
Biophysical journal,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
April 2006,
Physical review letters,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
November 2009,
Neural computation,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
April 2000,
Biological cybernetics,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
March 1966,
Biophysical journal,
D F Donnelly, and
W F Nolan, and
E J Smith, and
R E Dutton
May 1972,
Archives of neurology,
