COUPLING BETWEEN RESPIRATORY AND STEPPING RHYTHMS DURING LOCOMOTION IN DECEREBRATE CATS
COUPLING BETWEEN RESPIRATORY AND STEPPING RHYTHMS DURING LOCOMOTION IN DECEREBRATE CATS
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DOI：
10.1152/jappl.1989.67.1.110
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发表时间：
1989-07-01
影响因子：
3.3
通讯作者：
MIYAMOTO, Y
中科院分区：
文献类型：
--
作者：
KAWAHARA, K;KUMAGAI, S;MIYAMOTO, Y
为了确定呼吸节奏和步进节奏之间的耦合强度是否以及如何随运动模式而变化，我们对膈肌和腓肠肌活动进行了相关分析。在脑丘前-乳腺后水平的自发性呼吸猫中，在跑步机上给中脑运动区施加紧张性电刺激以诱导运动。记录左膈肌和双侧腓肠肌的肌电图。跑步机带速的变化和中脑运动区刺激强度的变化可引起不同的运动模式。横膈肌和腓肠肌活动的交叉相关图显示，当猫走得慢时，这种耦合不存在或很弱。运动-呼吸耦合强度随平均步幅间隔的缩短而增加。当动物疾驰时，呼吸节奏与踏步节奏保持1:1。这项研究表明，呼吸节奏和步伐节奏之间的耦合强度取决于引发的运动模式，特别是动物是否跑步。
To determine whether and how the strength of coupling between respiratory and stepping rhythms varies depending on locomotor patterns, correlation analysis was done of diaphragmatic and gastrocnemius muscle activities. In spontaneously breathing cats decerebrated at the precollicular-postmammillary level, tonic electrical stimulation was delivered to the mesencephalic locomotor region to induce locomotion on a treadmill. Electromyograms were recorded from the left hemidiaphragm and the bilateral gastrocnemius muscles. Various locomotor patterns were elicited by changes in the belt speed of the treadmill and in the intensity of stimulation of the mesencephalic locomotor region. Cross-correlograms between diaphragmatic and gastrocnemius activities showed that coupling was absent or weak when the cats walked slowly. The strength of locomotor-respiratory coupling tended to increase as the mean stepping interval shortened. When the animals were galloping, the respiratory rhythm was entrained 1:1 with the stepping rhythm. This study showed that the strength of coupling between respiratory and stepping rhythms varied depending on the locomotor patterns elicited, especially on whether the animals were running.