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OPLL
Published in Kelechi Eseonu, Nicolas Beresford-Cleary, Spine Surgery Vivas for the FRCS (Tr & Orth), 2022
Kelechi Eseonu, Nicolas Beresford-Cleary
Posterior laminectomy (removal of the whole lamina) or laminoplasty (removal of a section of the lamina) surgeries occasionally fail to relieve anterior compression of the spinal cord caused by preoperatively existing cervical kyphosis and/or OPLL. These anterior components prevent neurological recovery because the posterior decompression mechanism depends on the posterior drift back of the spinal cord.
Radiculopathies
Published in Ibrahim Natalwala, Ammar Natalwala, E Glucksman, MCQs in Neurology and Neurosurgery for Medical Students, 2022
Ibrahim Natalwala, Ammar Natalwala, E Glucksman
Label the parts of the lumbar vertebra shown below, a-f Superior articular facetInferior articular facetTransverse processSpinous processPedicleVertebral bodyMammillary processLaminaSpinal canal
Spinal Cord and Reflexes
Published in Nassir H. Sabah, Neuromuscular Fundamentals, 2020
Lamina VII of the spinal cord contains the intermediolateral nucleus (Figure 11.2), which extends from vertebral levels T1 to L2, and harbors the autonomic motor neurons of the entire sympathetic innervation of the body. In addition, the various laminae contain propriospinal neurons that transmit signals between segments of the spinal cord. The axons of these neurons form propriospinal tracts that could be ascending, descending, crossed, or uncrossed. Propriospinal neurons may receive strong peripheral input but generally little supraspinal input. The C3-C4 propriospinal system is a special descending system discussed in Section 12.2.5.5.
Robotic navigation during spine surgery: an update of literature
Published in Expert Review of Medical Devices, 2023
Qi Zhang, Xiao-Guang Han, Ming-Xing Fan, Jing-Wei Zhao, Zhao Lang, Ji-Le Jiang, Da He, Bo Liu, Wei Tian
In the field of robotics-assisted laminectomy, there are no commercially available robotic systems, and most studies are in the experimental stage [65]. The ideal surgical approach to perform laminectomy is to stop bone cutting when the tool is ‘about to penetrate’ the lamina. Li et al. [63] investigated the reliability of a collaborative spinal robotic system for laminectomy and compared it with manual laminectomy on in vitro porcine lumbar vertebral specimens. The incidence of complete lamina penetration was 6.7% in the robotics-assisted group and 30% in the manual group [63]. Many in vitro studies of robotics-assisted laminectomy have exhibited good clinical results, but uncertainties remain about the accuracy and safety of robotics-assisted laminectomy in a dynamic environment.
Biomechanical effect of posterior ligament repair in lamina repair surgery
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2023
Kaixiang Jin, Yuanjun Zhu, Nan Li, Yinghui Li, Yan Yao, Zhongjun Mo, Yubo Fan
Lamina repair has been adopted widely to treat intraspinal lesions since it firstly proposed by Raimondi in 1976 (Raimondi et al. 1976). In the follow-up’s studies, it was found that lamina repair can maintain spinal stability and integrity, and can prevent the development of spinal instability and kyphosis (Hida et al. 2006; Menku et al. 2010; Zhou et al. 2013). In a cadaveric study, it was proved that the lamina repair brought more stability than laminectomy (Nong et al. 2015). Another cadaveric study focussing on the spinal stability found that after excision of the ISL between C2-C3 and C7-T1, the ROM of the entire C2-T1 increased by 7.9%, 2.4%, 5.6% in flexion, lateral bending and axial rotation, meanwhile the ROM of C2-C3 and C7-T1 increased by 36.5%, 25.4% in flexion (Healy et al. 2016). By investigating the importance of the ISL in the enhancement of spinal flexion stability, new methods of conserving or repairing the posterior ligament during laminectomy was proposed (Hotta 1976; Sano 1983; Joson and McCormick 1987; Hirofuji et al. 1990).
Tubular minimally invasive resection of McCormick type II paraspinal schwannoma: preliminary experience
Published in British Journal of Neurosurgery, 2023
Yan-Wei Jiang, Xiong-Jie Xu, Rui Wang, Chun-Mei Chen
The surgical approach to paraspinal schwannomas depends on the location and extent of the tumor.6 Traditional posterior approaches usually require removal of the facet joint and lamina, often necessitating fusion due to postoperative spinal instability.7,8 Extensive dissection required in the posterior approach may also increase the risk of postoperative complications.9 According to the McCormick classification, paraspinal tumors can be categorized into five types based on the location and extension of the lesion.10 In particular, McCormick type II paraspinal schwannomas exhibit no foraminal or intraspinal extension, allowing for the use of minimally invasive treatment.8 Due to the specific anatomic relationship of the paraspinal schwannomas with the surroundings, the surgical approach should be tailored individually.