Abstract:
:Spinal cord injury damaging the rubrospinal tract (RST) interferes with skilled forelimb movement, but identification of the precise role of the RST in this behavior is impeded by the difficulty of surgically isolating the RST from other pathways running within the lateral funiculus (LF). The present study used a skilled reaching task and a behavioral/anatomical dissection method to identify the contribution of the RST to skilled forelimb movement. Rats were trained on the skilled reaching task and subjected to lesions of the LF. Based on histological evaluation, the animals were assigned to large, medium, or small LF lesion size groups. End point and arm/hand/digit movements were subsequently identified for each group. Success was impaired in all groups, but the impairment was not related to lesion size. Frame-by-frame qualitative analysis of the video recordings revealed that large LF lesions abolished the elements of digits close, digits open, arpeggio, grasp, supination 2, and release. Medium LF lesions interfered with a subset of the movement elements that were shown to be affected by the large LF lesions, namely arpeggio and grasp. Only the arpeggio movement was compromised after small LF lesions. The results show that not only does the LF contribute to skilled reaching, but because the RST was likely to have been damaged in all lesion groups, the RST is more involved in hand rotation than in digit use. The results are discussed in relation to the fiber tracts that are likely to be damaged in the different LF lesion groups.
journal_name
J Neurotraumajournal_title
Journal of neurotraumaauthors
Morris R,Tosolini AP,Goldstein JD,Whishaw IQdoi
10.1089/neu.2010.1708subject
Has Abstractpub_date
2011-12-01 00:00:00pages
2439-51issue
12eissn
0897-7151issn
1557-9042journal_volume
28pub_type
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journal_title:Journal of neurotrauma
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journal_title:Journal of neurotrauma
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journal_title:Journal of neurotrauma
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journal_title:Journal of neurotrauma
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doi:10.1089/neu.2016.4930
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abstract::Traumatic brain injury (TBI) is a leading cause of death and disability. Yet, despite immense research efforts, treatment options remain elusive. Translational failures in TBI are often attributed to the heterogeneity of the TBI population and limited methods to capture these individual variabilities. Advances in mach...
journal_title:Journal of neurotrauma
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doi:10.1089/neu.2020.7357
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abstract::We investigated the role of the axon guidance molecule EphA4 following traumatic brain injury (TBI) in mice. Neutralization of EphA4 improved motor function and axonal regeneration following experimental spinal cord injury (SCI). We hypothesized that genetic absence of EphA4 could improve functional and histological o...
journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2012.2376
更新日期:2012-11-20 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.1989.6.153
更新日期:1989-10-01 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2012.2438
更新日期:2013-01-01 00:00:00
abstract::Increasing evidence indicates that post-traumatic stress disorder (PTSD) may develop following traumatic brain injury (TBI), despite most patients having no conscious memory of their accident. This prospective study examined the frequency, timing of onset, symptom profile, and trajectory of PTSD and its psychiatric co...
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pub_type: 杂志文章
doi:10.1089/neu.2015.3992
更新日期:2016-05-01 00:00:00
abstract::Patients sustaining severe traumatic brain injury (TBI) have variable long-term outcomes. We examined the association between Glasgow Outcome Scale (GOS) assessed at 3 months and long-term outcomes at 12 months after TBI. We studied 159 patients with severe, closed traumatic brain injuries (Glasgow Coma Scale [GCS] journal_title:Journal of neurotrauma pub_type: 杂志文章 doi:10.1089/neu.2005.22.947 更新日期:2005-09-01 00:00:00
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journal_title:Journal of neurotrauma
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journal_title:Journal of neurotrauma
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doi:10.1089/neu.2007.0322
更新日期:2007-11-01 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2006.0119
更新日期:2007-03-01 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2018.5657
更新日期:2019-01-15 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章
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更新日期:2002-06-01 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章
doi:10.1089/neu.2009.0987
更新日期:2009-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1089/089771501317095250
更新日期:2001-11-01 00:00:00
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journal_title:Journal of neurotrauma
pub_type: 杂志文章,评审
doi:10.1089/neu.1995.12.825
更新日期:1995-10-01 00:00:00