Stroke is the third leading cause of death and disability worldwide. Post-stroke spasticity (PSS) is the most common complication of stroke but represents only one of the many manifestations of upper motor neuron syndrome. As an upper motor neuron, the corticospinal tract (CST) is the only direct descending motor pathway that innervates the spinal motor neurons and is closely related to the recovery of limb function in patients with PSS. Therefore, promoting axonal remodeling in the CST may help identify new therapeutic strategies for PSS. In this review, we outline the pathological mechanisms of PSS, specifically their relationship with CST, and therapeutic strategies for axonal regeneration of the CST after stroke. We found it to be closely associated with astroglial scarring produced by astrocyte activation and its secretion of neurotrophic factors, mainly after the onset of cerebral ischemia. We hope that this review offers insight into the relationship between CST and PSS and provides a basis for further studies.
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http://dx.doi.org/10.1007/s13760-023-02377-w | DOI Listing |
Eur J Neurosci
January 2025
Department of Kinesiology, Trent University, Peterborough, ON, Canada.
Previous research on resting muscles has shown that inter-pulse interval (IPI) duration influences transcranial magnetic stimulation (TMS) responses, which can introduce serious confounding variables into investigations if not accounted for. However, it is far less clear how IPI influences TMS responses in active muscles. Thus, the purpose of this study was to examine the relationship between IPI and corticospinal excitability during submaximal isometric elbow flexion.
View Article and Find Full Text PDFNeuropathology
January 2025
Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan.
The degeneration of pyramidal tracts has been reported in frontotemporal lobar degeneration with TDP-43 (TAR DNA-binding protein 43) pathology (FTLD-TDP) type C. Herein, we examined the detailed pathology of the primary motor area and pyramidal tracts in the central nervous system in four autopsy cases of FTLD-TDP type C, all of which were diagnosed by neuropathological, biochemical, and genomic analyses. Three patients showed right dominant atrophy of the frontal and temporal lobes, while the other patient showed left dominant atrophy.
View Article and Find Full Text PDFCureus
January 2025
Department of Internal Medicine, Section of Neurology, Chong Hua Hospital, Cebu, PHL.
Hereditary spastic paraplegia (HSP) is a rare neurodegenerative disease caused by retrograde degeneration of the corticospinal tract and posterior columns, which presents with progressive bilateral leg weakness and spasticity. HSP is inherited in an autosomal dominant pattern involving over 80 causative genes. The recently identified causative gene is the ubiquitin-associated protein 1 ()gene, which is associated with juvenile-onset pure spastic paraplegia-80 (SPG80).
View Article and Find Full Text PDFAsia Pac J Sports Med Arthrosc Rehabil Technol
January 2025
Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China.
Background: Persistent maladaptive changes of corticospinal tract (CST) and quadriceps strength deficits exist in patients with anterior cruciate ligament reconstruction (ACLR). This study aimed to investigate the relationships between the structural alterations of CST and quadriceps muscle strength deficits in patients with ACLR.
Methods: Twenty-nine participants who had undergone unilateral ACLR (29 males; age = 32.
Transl Stroke Res
January 2025
Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200040, China.
To investigate corticospinal tract (CST) injury and remodeling in patients with basal ganglia intracerebral hemorrhage (ICH) and explore the characterization capabilities of the corresponding parameters. In this prospective study, baseline, scale, and diffusion-weighted imaging (DWI) data were collected from patient cohorts. Participants were stratified into favorable (0-3 points) and unfavorable (4-6 points) prognosis groups, based on Modified Rankin Scale (mRS) after 3-6 months.
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