PMID- 11447319
OWN - NLM
STAT- MEDLINE
DCOM- 20010906
LR  - 20190718
IS  - 0959-4965 (Print)
IS  - 0959-4965 (Linking)
VI  - 12
IP  - 10
DP  - 2001 Jul 20
TI  - Different classifications of UPOs in the parametrically different chaotic ISI 
      series of a neural pacemaker.
PG  - 2121-4
AB  - Various interspike intervals (ISIs) in a series of spontaneous discharges of 
      experimental neural pacemakers were identified as chaotic and as lying between 
      stable period 2 and stable period 3. The method of So et al. for detection of 
      unstable periodic orbits (UPOs) was applied to analyze two chaotic ISI series 
      generated under the action of [Ca2+]o in different concentrations. In the chaotic 
      ISI series near the stable period 2, an unstable period 2 orbit was detected. In 
      the chaotic ISI series near the stable period 3, both an unstable period 2 orbit 
      and an unstable period 3 orbit were detected. The location of the unstable period 
      2 orbit was close to that of the stable period 2 in the return map, while the 
      location of the unstable period 3 orbit was close to that of the stable period 3. 
      The results not only revealed the structures of various chaotic ISI series, but 
      also indicated that the classification of UPOs could reflect the experimental 
      control parameters at which the chaotic ISI series were generated. The previously 
      discovered period adding bifurcation in the ISI series generated by experimental 
      neural pacemakers [12] was further described in terms of the evolution of the 
      period orbits.
FAU - Ren, W
AU  - Ren W
AD  - Institute of Space Medico-Engineering, PO. Box 5104, Branch 15, Beijing, 100094, 
      PR China.
FAU - Gu, H
AU  - Gu H
FAU - Jian, Z
AU  - Jian Z
FAU - Lu, Q
AU  - Lu Q
FAU - Yang, M
AU  - Yang M
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Neuroreport
JT  - Neuroreport
JID - 9100935
SB  - IM
MH  - Action Potentials/*physiology
MH  - Animals
MH  - Biological Clocks/*physiology
MH  - Male
MH  - *Nonlinear Dynamics
MH  - Rats
MH  - Rats, Sprague-Dawley
MH  - Sciatic Nerve/injuries/physiology
EDAT- 2001/07/12 10:00
MHDA- 2001/09/08 10:01
CRDT- 2001/07/12 10:00
PHST- 2001/07/12 10:00 [pubmed]
PHST- 2001/09/08 10:01 [medline]
PHST- 2001/07/12 10:00 [entrez]
AID - 10.1097/00001756-200107200-00016 [doi]
PST - ppublish
SO  - Neuroreport. 2001 Jul 20;12(10):2121-4. doi: 10.1097/00001756-200107200-00016.