Abstract:
:Abdominal muscle electromyograms were monitored in response to graded mechanical loads added to either inspiration or expiration in anesthetized cats. The surgical preparation, the apparatus, and the levels of loads applied (resistive, tracheal occlusion, and continuous positive pressure) were matched with those employed in our previous study on medullary expiratory neurons [Baker et al, 1979]. Although expiratory neuron firing was significantly increased by each of three graded levels of expiratory resistive loads, abdominal muscles were activated in only about 50% of the animals exposed to the highest-level resistive load. The smaller resistive loads failed to elicit any discernible abdominal muscle activity. These findings suggest that the lower motor neurons have a higher threshold for activation than the medullary neurons. Recruitment of medullary expiratory neurons and integration of synaptic input at the spinal level must play important roles in the response to expiratory loading. Abdominal muscles did not respond to mechanical loading during inspiration. Bilateral cervical vagotomy eliminated the abdominal muscle responses to expiratory loads.
journal_name
J Neurosci Resjournal_title
Journal of neuroscience researchauthors
Baker JP Jr,Frazier DTdoi
10.1002/jnr.490130413subject
Has Abstractpub_date
1985-01-01 00:00:00pages
581-9issue
4eissn
0360-4012issn
1097-4547journal_volume
13pub_type
杂志文章abstract::Brain metabolism increases during stimulation, but this increase does not affect all energy metabolism equally. Briefly after stimulation, there is a local increase in cerebral blood flow and in glucose uptake, but a smaller increase in oxygen uptake. This indicates that temporarily the rate of glycolysis is faster th...
journal_title:Journal of neuroscience research
pub_type: 杂志文章,评审
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
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更新日期:2005-12-01 00:00:00
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19980515)52:4<453::AID-JNR
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
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更新日期:1987-01-01 00:00:00
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4547(19970901)49:5<592::AID-JNR
更新日期:1997-09-01 00:00:00
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490050605
更新日期:1980-01-01 00:00:00
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journal_title:Journal of neuroscience research
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doi:
更新日期:1997-04-15 00:00:00
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490260205
更新日期:1990-06-01 00:00:00
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.1094
更新日期:2001-05-15 00:00:00
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490270210
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
doi:10.1002/jnr.490260306
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journal_title:Journal of neuroscience research
pub_type: 杂志文章
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更新日期:2009-02-01 00:00:00
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journal_title:Journal of neuroscience research
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更新日期:2014-03-01 00:00:00
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更新日期:2006-11-01 00:00:00