Role of muscle afferent activation on cortical evoked potential triggering in young rabbits

1973 ◽  
Vol 6 (2) ◽  
pp. 157-165
Author(s):  
A. A. Volokhov ◽  
I. A. Shimko
2021 ◽  
Vol 35 (S1) ◽  
Author(s):  
Rie Ishizawa ◽  
Norio Hotta ◽  
Han Kim ◽  
Gary Iwamoto ◽  
Jere Mitchell ◽  
...  

2016 ◽  
Vol 37 (8) ◽  
pp. 1162-1167 ◽  
Author(s):  
Sanjiv K. Bhimrao ◽  
Trung N. Le ◽  
Charles C. Dong ◽  
Serge Makarenko ◽  
Sarin Wongprasartsuk ◽  
...  

1995 ◽  
Vol 73 (2) ◽  
pp. 662-673 ◽  
Author(s):  
L. M. Mendell ◽  
J. S. Taylor ◽  
R. D. Johnson ◽  
J. B. Munson

1. In this study we describe application of high-frequency stimulation to the group Ia afferent-to-motoneuron synapse of cats to determine the extent to which regeneration of axotomized muscle afferents and motoneurons into skin or into muscle rescues their ability to generate excitatory postsynaptic potentials (EPSPs). 2. The medial gastrocnemius (MG) muscle nerve was transected and 1) left chronically axotomized, 2) cross-united to the caudal cutaneous sural (CCS) nerve, or 3) self-united. The ability of the operated MG muscle afferents to generate EPSPs in normal lateral gastrocnemius-soleus (LGS) motoneurons and of normal LGS muscle afferents to generate EPSPs in the operated MG motoneurons was tested 5 wk-30 mo later. 3. EPSPs were generated by bursts of 32 shocks at 167 Hz and averaged in register. In normal cats, EPSP amplitude decreased (negative modulation) during these bursts in type S motoneurons and could increase or decrease in type F motoneurons (positive or negative modulation). 4. After axotomy, EPSPs generated both in axotomized motoneurons and by axotomized afferents showed only negative modulation during the burst, and the negative modulation was much greater than in normal animals. Regeneration of the muscle nerve into skin significantly decreased the negative modulation relative to axotomy. Regeneration of the muscle nerve into muscle restored the EPSP modulation behaviors even more, to essentially normal values. 5. We conclude that the ability of muscle afferents to generate EPSPs in motoneurons in response to high-frequency stimulation, and the ability of motoneurons to express those EPSPs, are both influenced by the target innervated by those neurons. Synaptic efficacy is severely reduced by target deprivation (axotomy), partially rescued by cross-regeneration into skin, and rescued virtually completely by regeneration into the native muscle. We speculate on the role of target-derived neurotrophins in these effects.


1984 ◽  
Vol 10 (3-4) ◽  
pp. 305-316 ◽  
Author(s):  
H. Yamashita ◽  
H. Kannan ◽  
K. Inenaga ◽  
K. Koizumi

2005 ◽  
Vol 82 (4) ◽  
pp. 635-645 ◽  
Author(s):  
Ambuja S. Bale ◽  
Tiffany L. Adams ◽  
Philip J. Bushnell ◽  
Timothy J. Shafer ◽  
William K. Boyes

1988 ◽  
Vol 98 (2) ◽  
pp. 116-120 ◽  
Author(s):  
Akira Inokuchi ◽  
Thomas V. Boran ◽  
Charles P. Kimmelman ◽  
James B. Snow

The effects of electrical stimulation of the olfactory bulb and the locus ceruleus on olfactory tubercle neurons were examined in rat models. Ipsilateral stimulation of the olfactory bulb produced excitation in 31% of olfactory tubercle neurons tested and inhibition in 17%. Twenty-two percent of the olfactory tubercle neurons were excited, whereas 9% were inhibited by ipsilateral stimulation of the locus ceruleus. Contralateral stimulation of the locus ceruleus produced similar responses in the same neuron entities. A negative-positive evoked potential was recorded in the olfactory tubercle after ipsilateral and contralateral stimulation of the locus ceruleus. Thirty-three percent of the olfactory tubercle neurons that responded orthodromically or antidromically to stimulation of the olfactory bulb were excited by ipsilateral stimulation of the locus ceruleus. In contrast, only 10% responded with excitation to ipsilateral stimulation of the locus ceruleus among the olfactory tubercle neurons that were unresponsive to stimulation of the olfactory bulb. These findings suggest that olfactory tubercle neurons that receive input from or sending output to the olfactory bulb are influenced by the noradrenergic system of the locus ceruleus. A possible role of the olfactory tubercle in olfactory transduction will also be discussed.


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