History and evolution of surgical treatment for spasticity: a journey from neurotomy to selective dorsal rhizotomy.

The evolution of neurosurgical approaches to spasticity spans centuries, marked by key milestones and innovative practitioners. Probable ancient descriptions of spasmodic conditions were first classified as spasticity in the 19th century through the interventions of Dr. William John Little on patients with cerebral palsy. The late 19th century witnessed pioneering efforts by surgeons such as Dr. Charles Loomis Dana, who explored neurotomies, and Dr. Charles Sherrington, who proposed dorsal rhizotomy to address spasticity. Dorsal rhizotomy rose to prominence under the expertise of Dr. Otfrid Foerster but saw a decline in the 1920s due to emerging alternative procedures and associated complications. The mid-20th century saw a shift toward myelotomy but the revival of dorsal rhizotomy under Dr. Claude Gros' selective approach and Dr. Marc Sindou's dorsal root entry zone (DREZ) lesioning. In the late 1970s, Dr. Victor Fasano introduced functional dorsal rhizotomy, incorporating electrophysiological evaluations. Dr. Warwick Peacock and Dr. Leila Arens further modified selective dorsal rhizotomy, focusing on approaches at the cauda equina level. Later, baclofen delivered intrathecally via an implanted programmable pump emerged as a promising alternative around the late 1980s, pioneered by Richard Penn and Jeffrey Kroin and then led by A. Leland Albright. Moreover, intraventricular baclofen has also been tried in this matter. The evolution of these neurosurgical interventions highlights the dynamic nature of medical progress, with each era building upon and refining the work of significant individuals, ultimately contributing to successful outcomes in the management of spasticity.

The occipital interhemispheric transtentorial approach: historical perspective and evolution over time.

PURPOSE: Access to the pineal region has always represented a fascinating challenge to the neurosurgeons. Almost equally thrilling is the historical evolution from the hard beginnings with extremely high mortality rates to the current surgical outcomes, with excellent resection rates without long-term morbidity for most of the patients. The purpose of this paper is to provide an overview of the historical evolution of the occipital interhemispheric transtentorial (OITT) approach and its role in the development of access to the pineal region. METHODS: Review of the literature highlights the occipital transtentorial approach from the historical context prior its description and the beginning to the current modifications and new recent insights. RESULTS: The occipital transtentorial approach described initially by Poppen in 1966 has played a key role in the progress and success accessing the pineal area. CONCLUSION: This historical review aims to highlight the extraordinary effort of those neurosurgeons who guided and led the development of one of the most important approaches to the pineal region.

Liliequist membrane: A systematic review of history, anatomy, clinical importance, and surgical challenges.

BACKGROUND: The Liliequist membrane (LM) represents a crucial yet challenging anatomical structure in neuroanatomy. First observed in 1875 and later elucidated by Bengt Liliequist in 1956, the LM's precise anatomical description and boundaries remain complex. Its significance extends to neurosurgery, impacting various procedures like endoscopic third ventriculocisternostomies, aneurysm and tumor surgeries, treatment of suprasellar arachnoid cysts, and managing perimesencephalic hemorrhages. However, a comprehensive understanding of the LM is hindered by inconsistent anatomical descriptions and limitations in available literature, warranting a systematic review. METHODS: A systematic review was conducted by searching PubMed, Science Direct, and Google Scholar for articles pertaining to Liliequist's membrane. The search employed Mesh terms like "Liliequist membrane," "Liliequist's diaphragm," and related variations. Inclusion criteria encompassed studies exploring the historical evolution, anatomical structure, radiological characteristics, and clinical implications of the LM in neurosurgery. RESULTS: The search yielded 358 articles, with 276 unique articles screened based on relevance. Following a meticulous screening process, 72 articles underwent full-text assessment, resulting in the inclusion of 5 articles meeting the eligibility criteria. The selected studies varied in methodology, including anatomical dissections, radiological evaluations, and clinical significance in neurosurgical procedures. Insights were derived on LM's anatomical variations, radiological visualization, and its critical role in guiding neurosurgical interventions. CONCLUSIONS: Despite advancements in understanding its clinical significance and radiological visualization, challenges persist in precisely delineating its boundaries. Further research, especially on embryological development and histological characterization, is essential. Enhancing comprehension of LM-related pathologies is crucial for accurate preoperative planning and optimizing patient outcomes in neurosurgery.

Prominent Neurosurgery Books of the Western World: How They Defined the Era of Modern Neurosurgery in the 19th Century.

The aim of this article is to introduce the 19th century neurosurgery books to reveal their contributions to modern neurosurgery. Methods In this study, 29 books were accessed, and reviewed, and the resources from the late 18th century and early 20th century were included. However, neurology or general surgery books that included neurosurgical subjects or chapter were excluded unless there were revolutionary ideas in their relevant chapters. The books of this period observed to have some common differences from the books that were written in the previous century. Parallel to the concept of cerebral localization, which started to develop in this period, neurosurgery evolved from skull surgery to brain surgery. Due to the advancements in patient care, anesthesia and sterile techniques, surgical medical branches showed rapid development in the 1800s. During this period, cerebral localization concept changed the comprehension and approach in neurosurgery and opened the gate of a new era in the field of neurological surgery unlike other branches and helped to establish modern neurosurgery. 19th century surgeons became able to operate on more complex cases with more advanced techniques. Knowledge of published pioneer papers and books help understanding of emergence of neurological surgery as a separate discipline.

An In-Depth Analysis of the Artery of Salmon: Anatomy and Neurosurgical Implications.

BACKGROUND: Michel Salmon was a prominent person in the field of plastic surgery during the early 20th century. His pioneering work contributed significantly to our understanding of human anatomy, particularly with the identification of the artery of Salmon (AOS). The objective of this study is to thoroughly investigate the AOS by conducting a comprehensive literature review, providing insights into its anatomy and surgical implications. METHODS: This review was undertaken after a thorough examination of literature encompassing papers about the AOS. Right up until January 2024, databases like PubMed, ScienceDirect, and Web of Science were explored. The search was conducted using specific terms such as "Artery of Salmon," "suboccipital artery," and "vertebral artery anatomy." An in-depth assessment was conducted to examine the anatomy, and surgical significance of the AOS. RESULTS: The AOS is a branch of the V3 segment of the vertebral artery that supplies the suboccipital muscles. The ability, to identify it, is critical for distinguishing the origins of intraoperative hemorrhage. Through careful surgical intervention, the artery was able to devascularize tumors and vascular lesions. We also touched on the technical issues of its possible application in bypass operations for aneurysms of the posterior inferior cerebellar artery or vertebral artery. CONCLUSIONS: The AOS is sometimes vital in neurosurgery, facilitating precise interventions and serving as a conduit in suboccipital bypass surgeries. Understanding its variations is essential for neurosurgeons, showcasing ongoing advancements in patient care.

The historical adventures of Takeshi Kawase: the mountaineer who explored the "no man's land" with love for art, nature, and humankind.

The anterior petrosal approach, or Kawase's approach, is a commonly used technique in skull base surgery to access the brainstem in the posterior fossa from the middle fossa, and has the advantages of minimizing brain retraction and preserving hearing. It was first successfully performed by the legendary Japanese neurosurgeon, Takeshi Kawase, for the clipping of a basilar artery aneurysm in 1981. To date, no historical article has shed light on Kawase's intriguing personal history. In this historical vignette, the authors depict Kawase's unique background, talent, passion, as well as struggles that ultimately shaped his career. By sharing Kawase's personal story from the hospital where he first successfully performed his original approach, the authors hope to pass on to future generations Kawase's spirit and philosophy that have impacted the global neurosurgical community.

The Mayo, Cushing, and Osler Influence on A. L. Rhoton: A Historical Vignette of the Interconnectedness Between Highly Influential Neurosurgery Leaders over 100 Years.

The careers of the Mayo brothers, Harvey Cushing, and Sir William Osler greatly shaped medical and surgical practice in the late 19th century and early 20th century and created a legacy to influence decades of physicians to follow. Additionally, these individuals were instrumental in the founding of neurosurgery as a distinct surgical specialty. Alongside these great men, Dr. Albert L. Rhoton Jr., revolutionized neurosurgical practice through his study of neuroanatomy and development of microsurgical technique in the second half of the 20th century. This review of the interactions and relationships between the Mayo brothers, Cushing, and Osler and their influences on Rhoton highlights the 100-year-long interconnectedness shared between these giants in the history of neurosurgery.

Art and Neurosurgery: The Importance of Medical Illustration.

Art in neurosurgery has been a critical part of the discipline for centuries. Numerous cultures, such as ancient India, China, and Egypt, and more contemporary scientists, such as Leonardo da Vinci, Max Brödel, and Norman Dott, have significantly contributed to medical illustration. Today, advancements in three-dimensional technology have allowed for the creation of detailed neuroanatomy models for surgical planning and education. Medical illustrations are also used for research and outcome documentation as they help visualize anatomy and surgical procedures. Its use in education, surgical planning, and navigation remains integral to the advancement of neurosurgery. This review demonstrates the invaluable contribution of art in neurosurgery and how it has enabled continuous progress in the field.

The birth of modern military neurosurgery through the eyes of Harvey Cushing's war memoir From a Surgeon's Journal, 1915-1918.

Dr. Harvey Cushing is considered the father of modern neurological surgery, and his role and efforts in World War I continue to have a lasting effect on today's practice of neurosurgery. During World War I, he embodied the tenets of a neurosurgeon-scientist: he created and implemented novel antiseptic techniques to decrease infection rates after craniotomies, leading him often to be referred to as "originator of brain wound care." His contributions did not come without struggles, however. He faced criticism for numerous military censorship violations, and he developed a severe peripheral neuropathy during the war. However, he continued to stress the importance of patient care and his surgical prowess was evident. In this paper, the authors summarize Cushing's notes published in From a Surgeon's Journal, 1915-1918 and discuss the impact of his experiences on his own practice and the field of neurosurgery.

Childhood-onset Craniopharyngioma.

Craniopharyngiomas are rare embryonic malformational tumors of the sellar/parasellar region, classified by the World Health Organization (WHO) as tumors with low-grade malignancy (WHO I). The childhood adamantinomatous subtype of craniopharyngioma is usually cystic with calcified areas. At the time of diagnosis, hypothalamic/pituitary deficits, visual disturbances, and increased intracranial pressure are major symptoms. The treatment of choice in case of favorable tumor location (without hypothalamic involvement) is complete resection. It is important to ensure that optical and hypothalamic functionality are preserved. In case of unfavorable tumor location, that is with hypothalamic involvement, a hypothalamus-sparing surgical strategy with subsequent local irradiation of residual tumor is recommended. In the further course of the disease, recurrences and progression often occur. Nevertheless, overall survival rates are high at 92%. Severe impairment of quality of life and comorbidities such as metabolic syndrome, hypothalamic obesity, and neurological consequences can be observed in patients with disease- and/or treatment-related lesions of hypothalamic structures. Childhood-onset craniopharyngioma frequently manifests as a chronic disease so that patients require lifelong, continuous care by experienced multidisciplinary teams to manage clinical and quality of life consequences. For this review, a search for original articles and reviews published between 1986 and 2020 was performed in Pubmed, Science Citation Index Expanded, EMBASE, and Scopus. The search terms used were "craniopharyngioma, hypothalamus, pituitary obesity, irradiation, neurosurgery.

Legacies of Neurosurgery and its Implications on Global Neurosurgery Today.

Trephination, the practice of boring a hole in the skull, is one of the oldest surgical procedures performed by and on humans. Fossil records show evidence of trephined skulls on separate continents throughout ancient history. Even more remarkably, fossils show that ancient humans actually survived the procedure, some more than once. Ancient mythologies and texts provide context to the fossil record, indicating that trephination was performed some of the time for medical indications, including traumatic head injury and intractable neurologic conditions. In the modern day, traumatic brain injury accounts for a significant percentage of the overall global burden of disease and its incidence is disproportionately increasing in low- and middle-income countries. In critical situations, neurosurgical intervention may be indicated. The burr hole procedure, or trephination, was identified as an essential surgical procedure that all first-level hospitals should be able to perform; however, there exists a dramatic lack of access to neurosurgical specialists and care globally, especially among low- and middle-income countries. Task-shifting/sharing is one paradigm that may be used effectively to broaden access to this life-saving procedure but it is at the moment a contested practice.

Minimally-invasive tubular retraction ports for intracranial neurosurgery: History and future perspectives.

Brain retraction is a necessary yet potentially damaging requirement of accessing lesions located in deep structures. The development of minimally-invasive tubular retractors (MITRs) provides the theoretical advantage of maximizing visualization of and access to deep-seated lesions, all while minimizing collateral tissue damage. These advantages make MITRs preferable to traditional bladed retractors in the majority of deep-seated lesions. Several commercially-available MITR systems currently exist and have been shown to aid in achieving excellent outcomes with acceptable safety profiles. Nevertheless, important drawbacks to currently-available MITR systems exist. Continued pursuit of an ideal MITR system that provides maximal visualization and access to deep-seated lesions while minimizing retraction-related tissue damage is therefore important. In this review, we discuss the historical development of MITRs, the advantages of MITRs compared to traditional bladed retractors, and opportunities to improve the development of prospective MITRs.

Precedent for the Present: Neurosurgery During the 1918 Wartime Influenza Pandemic.

In the early twentieth century, early neurosurgical pioneers marked their claims in the specialty during the combined threats of the Spanish influenza and World War I. Their stories, intimately connected, demonstrate personal and professional losses in the backdrop of overarching perseverance to achieve that which allowed neurosurgery to evolve into modernity. Today, as global order adapts to the severe acute respiratory syndrome coronavirus (SARS-COVID-19) pandemic, their stories provide an opportunity for reflection as we carve our way forward as a specialty.

The History of Neurosurgical Spinal Oncology: From Inception to Modern-Day Practices.

The neurosurgical management of spinal neoplasms has undergone immense development in parallel with advancements made in general spine surgery. Laminectomies were performed as the first surgical procedures used to treat spinal neoplasms. Since then, neurosurgical spinal oncology has started to incorporate techniques that have developed from recent advances in minimally invasive spine surgery. Neurosurgery has also integrated radiotherapy into the treatment of spine tumors. In this historical vignette, we present a vast timeline spanning from the Byzantine period to the current day and recount the major advancements in the management of spinal neoplasms.

Progress in neurosurgery: Contributions of women neurosurgeons in the Middle East.

The Middle East is known for its complex history and rich environment and culture. The region is home to a wide variety of traditions, cultures and religions, which have made the area vulnerable to political conflicts. Despite these difficulties, science and medicine have always thrived in the region, with many medical practices and principles established by physicians and scholars living in the Middle East. The first academic neurosurgical activity in the region started in the 1950s. The first women neurosurgeons in the Middle East started training in the 1970s, and were from Iran, Palestine, followed by Saudi Arabia in the 1970s. These pioneers have encountered serious challenges, yet have become role models for the next generation. These women have paved the way and facilitated neurosurgical training and practice for more women surgeons. The gradual increase in the number of women neurosurgical residents in the region leads to the expectation that women will play a more prominent role in the future as leaders in neurosurgery in the Middle East. This collaborative study, which identifies the known women neurosurgeons in the Middle East for the first time, may serve to provide background and context for further contributions of women neurosurgeons for our profession and our patients.

Progress in neurosurgery: Contributions of women neurosurgeons in Latin America.

Nearly 75 years after the first woman neurosurgeon was trained in Latin America, the field of neurosurgery is changing and the prominence of women neurosurgeons within the specialty is increasing. By researching the histories of individual physicians and neurosurgeons, as well as neurosurgical departments and societies, we present, for the first time, the history of the women in neurosurgery in Latin America. Women neurosurgeons in the region have made notable progress, inspiring subsequent generations and actively participating in organized neurosurgery, medical leadership outside neurosurgery, academic neurosurgery, and leadership in contemporary society. The establishment of "Women in Neurosurgery" networks and organizations has been important to the success of many of these efforts. This collaborative study, which identifies the known women neurosurgeons in Latin America for the first time, may serve to provide background and context for further contributions of women neurosurgeons for our profession and our patients.

Progress in neurosurgery: Contributions of women neurosurgeons in Asia and Australasia.

At the end of the first 100 years of neurosurgery as a specialty, it is appropriate to look back and then imagine the future. As neurosurgery celebrates its first century, the increasing role of women neurosurgeons is a major theme. This article documents the early women pioneers in neurosurgery in Asia and Australasia. The contributions of these trailblazers to the origins, academics, and professional organizations of neurosurgery are highlighted. The first woman neurosurgeon of the region, Dr. T.S. Kanaka of India, completed her training in 1968, not long after the trailblazers in Europe and North America. She heralded the vibrant communities of neurosurgical women that have developed in the vast and diverse nations of the region, and the many formal and informal groups of women in neurosurgery that have introduced and promoted talented women in the profession. Contributions of women neurosurgeons to academic medicine and society as a whole are briefly highlighted, as are their challenges in this male-dominated specialty. The region is home to many deeply conservative societies; in fact, some nations in the region have not yet trained their first woman neurosurgeon. The fortitude of these individuals to achieve at the highest levels of neurosurgery indicates great potential for future growth of women in the profession, but also demonstrates the need for initiatives and advocacy to reach the full potential of gender equity.