Intrinsic excitability differs between murine hypoglossal and spinal motoneurons.
Intrinsic excitability differs between murine hypoglossal and spinal motoneurons.
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小鼠舌下运动神经元和脊髓运动神经元的内在兴奋性不同。
DOI:
10.1152/jn.01114.2015
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发表时间:
2016
影响因子:
2.5
通讯作者:
Callister,RJ
中科院分区:
文献类型:
--
作者:
Tadros,MA;Fuglevand,AJ;Brichta,AM;Callister,RJ
Motoneurons differ in the behaviors they control and their vulnerability to disease and aging. For example, brain stem motoneurons such as hypoglossal motoneurons (HMs) are involved in licking, suckling, swallowing, respiration, and vocalization. In contrast, spinal motoneurons (SMs) innervating the limbs are involved in postural and locomotor tasks requiring higher loads and lower movement velocities. Surprisingly, the properties of these two motoneuron pools have not been directly compared, even though studies on HMs predominate in the literature compared with SMs, especially for adult animals. Here we used whole cell patch-clamp recording to compare the electrophysiological properties of HMs and SMs in age-matched neonatal mice (P7–P10). Passive membrane properties were remarkably similar in HMs and SMs, and afterhyperpolarization properties did not differ markedly between the two populations. HMs had narrower action potentials (APs) and a faster upstroke on their APs compared with SMs. Furthermore, HMs discharged APs at higher frequencies in response to both step and ramp current injection than SMs. Therefore, while HMs and SMs have similar passive properties, they differ in their response to similar levels of depolarizing current. This suggests that each population possesses differing suites of ion channels that allow them to discharge at rates matched to the different mechanical properties of the muscle fibers that drive their distinct motor functions.
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影响因子:
2.5
作者:
M. Rende;I. Giambanco;Marina Buratta;P. Tonali
通讯作者:
P. Tonali
DOI:
10.1113/jphysiol.2014.282640
发表时间:
2014
期刊:
The Journal of Physiology
影响因子:
--
作者:
M. Rank;J. R. Flynn;Camila R. Battistuzzo;Mary P. Galea;Robert J. Callister;Robert J. Callister
通讯作者:
Robert J. Callister
DOI:
--
发表时间:
1990
期刊:
Journal of Physiology
影响因子:
--
作者:
Tomoyuki Takahashi
通讯作者:
Tomoyuki Takahashi
DOI:
10.1111/j.1748-1716.1980.tb06650.x
发表时间:
1980
期刊:
Acta physiologica Scandinavica
影响因子:
--
作者:
Eric Hellstrand
通讯作者:
Eric Hellstrand
影响因子:
2.5
作者:
Pilarski,JasonQ;Wakefield,HilaryE;Fuglevand,AndrewJ;Levine,RichardB;Fregosi,RalphF
通讯作者:
Fregosi,RalphF