Lumbar Nerves
Lumbar Nerves - Related Videos
02:51
Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation
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2025
Source: Wang, L., et.al. Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation. J. Vis. Exp.(2023)This video demonstrates a minimally invasive endoscopic procedure to treat lumbar disc herniation by removing the protruded nucleus pulposus and ruptured annulus fibrosus. The technique decompresses the affected nerve root, alleviates pain, and restores nerve function through targeted tissue resection and radiofrequency modulation.
07:38
Circumferential Transforaminal Endoscopic Lumbar Foraminotomy for 360° Exiting Nerve Root Decompression in Patients with Lumbar Foraminal Stenosis
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2026
This protocol describes circumferential transforaminal endoscopic lumbar foraminotomy for 360° decompression of the exiting nerve root in patients with lumbar foraminal stenosis using a step-by-step, landmark-based approach to achieve adequate bony and soft-tissue decompression.
03:02
Intrathecal Placement of Lumbar Drain: A Technique to Withdraw Cerebrospinal Fluid from the Lumbar Spine in Porcine Model
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2025
This video describes the technique of intrathecal placement of a lumbar drain in a porcine ischemic model, which helps in draining the cerebrospinal fluid to a drainage system. The cerebrospinal fluid pressure is monitored by the drainage system, and fluid is drained to maintain a constant cerebrospinal fluid pressure.
05:05
Laminotomy for Targeted Injection into the Lumbar Dorsal Root Ganglion in a Pig Model
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2025
Source: Unger, M. D., et al., Laminotomy for Lumbar Dorsal Root Ganglion Access and Injection in Swine. J. Vis. Exp. (2017)This video demonstrates a laminotomy procedure in an anesthetized pig to access the lumbar dorsal root ganglion for targeted neurotherapeutic delivery using convection-enhanced delivery.
04:36
Surgical Induction of Lumbar Spine Instability in Mouse Model: A Surgical Procedure for the Resection of the Lumbar Spinous Processes and Connected Ligaments in Murine Model
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2025
In this video, we describe the surgical procedure to induce lumbar spine instability in a mouse model by resecting the Lumbar L3 to L5 spinous process along with supraspinous and interspinous ligaments.
FAQs
The dorsal root carries sensory information toward the central nervous system, whereas the ventral root carries motor commands away from it. Their union creates a mixed nerve with both functions. This arrangement allows a single lumbar nerve pathway to participate in sensation and movement while preserving distinct entry and exit routes for neural signals.
After the sensory and motor roots join, each lumbar nerve contains pathways traveling in both directions. Sensory fibers report information from the trunk or lower limbs, while motor fibers transmit commands to muscles and glands. Recognizing this dual composition helps explain why disruption of one nerve can affect both sensation and motor function.
The lumbar plexus reorganizes and distributes fibers from neighboring lumbar nerves into branching pathways. These branches direct signals toward particular target tissues rather than leaving each spinal nerve to serve an isolated region. This shared organization helps account for the patterned innervation of the trunk and lower limbs and provides an anatomical framework for tracing neural pathways.
Reflexes depend on coordinated sensory input and motor output, so the paired root arrangement provides a structural basis for linking incoming information with an appropriate response. Compression near a nerve root can interfere with these pathways before signals reach their peripheral targets. Mapping the affected root and its branches therefore supports interpretation of neurological findings and related conditions.
A neurological examination can use the distribution of sensory and motor pathways to assess how lower-limb and trunk functions are represented. Findings can then be considered alongside the organization of roots, foramina, and plexus branches. This anatomical approach helps clinicians relate observed changes in sensation, movement, or reflexes to possible involvement of particular neural pathways.
Imaging uses the relationships among lumbar nerves, vertebral openings, roots, and plexus pathways to investigate possible structural involvement. Regional anesthesia likewise depends on identifying the relevant nerve pathways so that sensory signaling from a selected region can be addressed. In both settings, anatomical organization connects the intended clinical target with the expected neural distribution.