Synaptic targets of commissural interneurons in the lumbar spinal cord of neonatal rats

2003 ◽  
Vol 461 (4) ◽  
pp. 429-440 ◽  
Author(s):  
András Birinyi ◽  
Kornél Viszokay ◽  
Ildikó Wéber ◽  
Ole Kiehn ◽  
Miklós Antal
Keyword(s):  
Spinal Cord ◽  
Lumbar Spinal Cord ◽  
Neonatal Rats ◽  
Lumbar Spinal

mRNA and protein expression and activities of nitric oxide synthases in the lumbar spinal cord of neonatal rats after sciatic nerve transection and melatonin administration

2006 ◽  
Vol 407 (2) ◽  
pp. 182-187 ◽  
Author(s):  
Fábio Rogério ◽  
Simone Aparecida Teixeira ◽  
Hamilton Jordão Júnior ◽  
Carla Cristina Judice Maria ◽  
André Schwambach Vieira ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Spinal Cord ◽  
Sciatic Nerve ◽  
Lumbar Spinal Cord ◽  
Nerve Transection ◽  
Neonatal Rats ◽  
Sciatic Nerve Transection ◽  
Melatonin Administration ◽  
Mrna And Protein Expression ◽  
Lumbar Spinal

Interactions Between Multiple Rhythm Generators Produce Complex Patterns of Oscillation in the Developing Rat Spinal Cord

2002 ◽  
Vol 87 (2) ◽  
pp. 1094-1105 ◽  
Author(s):  
Rezan Demir ◽  
Bao-Xi Gao ◽  
Meyer B. Jackson ◽  
Lea Ziskind-Conhaim
Keyword(s):  
Spinal Cord ◽  
Spatial Organization ◽  
Imaging Techniques ◽  
Field Potential ◽  
Phase Relationship ◽  
Rhythmic Activity ◽  
Lumbar Spinal Cord ◽  
Spatiotemporal Pattern ◽  
Neonatal Rats ◽  
Lumbar Spinal

Neural networks capable of generating coordinated rhythmic activity form at early stages of development in the spinal cord. In this study, voltage-imaging techniques were used to examine the spatiotemporal pattern of rhythmic activity in transverse slices of lumbar spinal cord from embryonic and neonatal rats. Real-time images were recorded in slices stained with the voltage-sensitive fluorescent dye RH414 using a 464-element photodiode array. Fluorescence signals showed spontaneous voltage oscillations with a frequency of 3 Hz. Simultaneous recordings of fluorescence and extracellular field potential demonstrated that the two signals oscillated with the same frequency and had a distinct phase relationship, indicating that the fluorescence changes represented changes in transmembrane potentials. The oscillations were reversibly blocked by cobalt (1 mM), indicating a dependence on Ca2+ influx through voltage-gated Ca2+ channels. Extracellular field potentials revealed oscillations with the same frequency in both stained and unstained slices. Oscillations were apparent throughout a slice, although their amplitudes varied in different regions. The largest amplitude oscillations were produced in the lateral regions. To examine the spatial organization of rhythm-generating networks, slices were cut into halves and quarters. Each fragment continued to oscillate with the same frequency as intact slices but with smaller amplitudes. This finding suggested that rhythm-generating networks were widely distributed and did not depend on long-range projections. In slices from neonatal rats, the oscillations exhibited a complex spatiotemporal pattern, with depolarizations alternating between mirror locations in the right and left sides of the cord. Furthermore, within each side depolarizations alternated between the lateral and medial regions. This medial-lateral pattern was preserved in hemisected slices, indicating that pathways intrinsic to each side coordinated this activity. A different pattern of oscillation was observed in slices from embryos with synchronous 3-Hz oscillations occurring in limited regions. Our study demonstrated that rhythm generators were distributed throughout transverse sections of the lumbar spinal cord and exhibited a complex spatiotemporal pattern of coordinated rhythmic activity.

Superoxide dismutase isoforms 1 and 2 in lumbar spinal cord of neonatal rats after sciatic nerve transection and melatonin treatment

2005 ◽  
Vol 154 (2) ◽  
pp. 217-225 ◽  
Author(s):  
Fábio Rogério ◽  
Simone A. Teixeira ◽  
Alexandre César Santos de Rezende ◽  
Rafael Cofiño de Sá ◽  
Luciano de Souza Queiroz ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Superoxide Dismutase ◽  
Sciatic Nerve ◽  
Lumbar Spinal Cord ◽  
Nerve Transection ◽  
Neonatal Rats ◽  
Melatonin Treatment ◽  
Sciatic Nerve Transection ◽  
Lumbar Spinal

Neurotransmitter systems of commissural interneurons in the lumbar spinal cord of neonatal rats

2007 ◽  
Vol 1178 ◽  
pp. 65-72 ◽  
Author(s):  
Ildikó Wéber ◽  
Gábor Veress ◽  
Péter Szűcs ◽  
Miklós Antal ◽  
András Birinyi
Keyword(s):  
Spinal Cord ◽  
Lumbar Spinal Cord ◽  
Neonatal Rats ◽  
Neurotransmitter Systems ◽  
Lumbar Spinal

Lipomeningocele associated with diplomyelia in a dog

2018 ◽  
Vol 46 (05) ◽  
pp. 323-329 ◽  
Author(s):  
Nele Ondreka ◽  
Sara Malberg ◽  
Emma Laws ◽  
Martin Schmidt ◽  
Sabine Schulze
Keyword(s):  
Spinal Cord ◽  
Neurological Status ◽  
Split Cord Malformation ◽  
Lumbar Spinal Cord ◽  
Histopathological Diagnosis ◽  
Type I ◽  
Thoracic Spinal Cord ◽  
Thoracic Spinal ◽  
Subcutaneous Mass ◽  
Lumbar Spinal

SummaryA 2-year-old male neutered mixed breed dog with a body weight of 30 kg was presented for evaluation of a soft subcutaneous mass on the dorsal midline at the level of the caudal thoracic spine. A further clinical sign was intermittent pain on palpation of the area of the subcutaneous mass. The owner also described a prolonged phase of urination with repeated interruption and re-initiation of voiding. The findings of the neurological examination were consistent with a lesion localization between the 3rd thoracic and 3rd lumbar spinal cord segments. Magnetic resonance imaging revealed a spina bifida with a lipomeningocele and diplomyelia (split cord malformation type I) at the level of thoracic vertebra 11 and 12 and secondary syringomyelia above the aforementioned defects in the caudal thoracic spinal cord. Surgical resection of the lipomeningocele via a hemilaminectomy was performed. After initial deterioration of the neurological status postsurgery with paraplegia and absent deep pain sensation the dog improved within 2 weeks to non-ambulatory paraparesis with voluntary urination. Six weeks postoperatively the dog was ambulatory, according to the owner. Two years after surgery the owner recorded that the dog showed a normal gait, a normal urination and no pain. Histopathological diagnosis of the biopsied material revealed a lipomeningocele which confirmed the radiological diagnosis.

Aging process of the human lumbar spinal cord: A morphometric analysis

1996 ◽  
Vol 16 (2) ◽  
pp. 106-111 ◽  
Author(s):  
Ming Zhou ◽  
Noboru Goto ◽  
Chen Zhang ◽  
Wei Tang
Keyword(s):  
Spinal Cord ◽  
Morphometric Analysis ◽  
Aging Process ◽  
Lumbar Spinal Cord ◽  
Lumbar Spinal

scholarly journals Multi-pronged neuromodulation intervention engages the residual motor circuitry to facilitate walking in a rat model of spinal cord injury

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Marco Bonizzato ◽  
Nicholas D. James ◽  
Galyna Pidpruzhnykova ◽  
Natalia Pavlova ◽  
Polina Shkorbatova ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Rat Model ◽  
Stress Responses ◽  
Learning Algorithm ◽  
Lumbar Spinal Cord ◽  
Cord Injury ◽  
Potential Synergy ◽  
Lumbar Spinal ◽  
Deep Brain

AbstractA spinal cord injury usually spares some components of the locomotor circuitry. Deep brain stimulation (DBS) of the midbrain locomotor region and epidural electrical stimulation of the lumbar spinal cord (EES) are being used to tap into this spared circuitry to enable locomotion in humans with spinal cord injury. While appealing, the potential synergy between DBS and EES remains unknown. Here, we report the synergistic facilitation of locomotion when DBS is combined with EES in a rat model of severe contusion spinal cord injury leading to leg paralysis. However, this synergy requires high amplitudes of DBS, which triggers forced locomotion associated with stress responses. To suppress these undesired responses, we link DBS to the intention to walk, decoded from cortical activity using a robust, rapidly calibrated unsupervised learning algorithm. This contingency amplifies the supraspinal descending command while empowering the rats into volitional walking. However, the resulting improvements may not outweigh the complex technological framework necessary to establish viable therapeutic conditions.

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