3,668 results match your criteria neurovascular structures


Leveraging high-resolution 7-tesla MRI to derive quantitative metrics for the trigeminal nerve and subnuclei of limbic structures in trigeminal neuralgia.

J Headache Pain 2021 Sep 23;22(1):112. Epub 2021 Sep 23.

BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA.

Background: Trigeminal Neuralgia (TN) is a chronic neurological disease that is strongly associated with neurovascular compression (NVC) of the trigeminal nerve near its root entry zone. The trigeminal nerve at the site of NVC has been extensively studied but limbic structures that are potentially involved in TN have not been adequately characterized. Specifically, the hippocampus is a stress-sensitive region which may be structurally impacted by chronic TN pain. Read More

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September 2021

Hydrogen Peroxide Skull Base Specimen Preparation: Singular View of Hidden Topographic Anatomy.

Turk Neurosurg 2021 May 7. Epub 2021 May 7.

Military University Hospital Prague, Department of Neurosurgery and Neurooncology, The Czech Republic.

Aim: The technical principles of the hydrogen peroxide head preparation method were recently presented. This article aims to demonstrate the high quality of anatomical studies performed using these specimens, particularly for arachnoid exploration.

Material And Methods: Five cadaveric heads were set with a 10% formalin solution and then injected with coloured latex. Read More

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Less Invasive Pediatric Spinal Deformity Surgery: The Case for Robotic-Assisted Placement of Pedicle Screws.

HSS J 2021 Oct 8;17(3):317-325. Epub 2021 Jul 8.

Department of Orthopedic Surgery, Hospital for Special Surgery, New York, NY, USA.

Pediatric spinal deformity involves a complex 3-dimensional (3D) deformity that increases the risk of pedicle screw placement due to the close proximity of neurovascular structures. To increase screw accuracy, improve patient safety, and minimize surgical complications, the placement of pedicle screws is evolving from freehand techniques to computer-assisted navigation and to the introduction of robotic-assisted placement. : The aim of this review was to review the current literature on the use of robotic navigation in pediatric spinal deformity surgery to provide both an error analysis of these techniques and to provide recommendations to ensure its safe application. Read More

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October 2021

Ear, Nose, and Throat Surgery: Postoperative Complications After Selected Head and Neck Operations.

Surg Clin North Am 2021 Oct 7;101(5):831-844. Epub 2021 Aug 7.

Department of Otolaryngology-Head and Neck Surgery, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI 48109, USA. Electronic address:

Unanticipated complications of ENT surgeries may have profound functional and esthetic consequences for patients. Herein, we provide a broad overview of postoperative complications after ENT surgery, illustrating their unique nature, impact, and principles of management. The discussion is organized by subspecialty to highlight the great anatomic complexity of the head and neck and the importance of critical neurovascular and sensory structures that make ENT an impactful, yet challenging surgical specialty. Read More

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October 2021

Endoscopic Transorbital Approach to Mesial Temporal Lobe for Intra-Axial Lesions: Cadaveric Study and Case Series (SevEN-008).

Oper Neurosurg (Hagerstown) 2021 Sep 15. Epub 2021 Sep 15.

Department of Neurosurgery , Gangnam Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea.

Background: Endoscopic transorbital approach (ETOA) has been proposed as a minimally invasive technique for the treatment of skull base lesions located around mesial temporal lobe (MTL), mostly extra-axial pathology.

Objective: To explore the feasibility of ETOA in accessing intraparenchymal MTL with cadaveric specimens and describe our initial clinical experience of ETOA for intra-axial lesions in MTL.

Methods: Anatomic dissections were performed in 4 adult cadaveric heads using a 0° endoscope. Read More

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September 2021

SAFE APPROACH FOR FLEXOR DIGITORUM PROFUNDUS I AND II USING THE PALMARIS LONGUS TENDON.

Arch Phys Med Rehabil 2021 Sep 10. Epub 2021 Sep 10.

Department of Physical Medicine and Rehabilitation, Korea University Ansan Hospital, Gyeonggi-do, Korea. Electronic address:

Objective: To investigate a safe and accurate approach to achieve needle insertion for electromyography of the flexor digitorum profundus (FDP) I and II muscles by identifying the anatomical relationship between the palmaris longus (PL) tendon, FDP muscle, and neurovascular bundle using ultrasonography.

Design: Descriptive study SETTING: Department of Physical Medicine and Rehabilitation PARTICIPANTS: Healthy individuals (age, 20-70 years) without any diseases (N=29; 15 men, 14 women; 58 forearms).

Interventions: Ultrasonography MAIN OUTCOME MEASURES: The FDP I and II muscles were transversely scanned on the volar aspect of the forearm at the junction of the middle and distal third between the medial epicondyle and ulnar styloid process. Read More

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September 2021

Retinal Neurovascular Structural Changes in Optical Coherence Tomography and the Relationship between These Changes and White Matter Hyperintensities in Patients with Migraine.

Eur Neurol 2021 Aug 30:1-12. Epub 2021 Aug 30.

Department of Ophthalmology, Adiyaman University Faculty of Medicine, Adiyaman, Turkey.

Introduction: This study aimed to reveal whether retinal nerve fiber layer (RNFL), ganglion cell layer (GCL) inner plexiform layer, and choroidal layer (CL) thicknesses differed in patients with migraine. Optical coherence tomography (OCT) was used to measure these neurovascular structural changes and determine the relationship between these structures and cranial white matter hyperintensities (WMHs).

Methods: This retrospective comparative registry study included a total of 155 individuals aged 18-55 (mean, 33. Read More

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Terahertz dielectric spectroscopy and solid immersion microscopy of glioma model 101.8: brain tissue heterogeneity.

Biomed Opt Express 2021 Aug 27;12(8):5272-5289. Epub 2021 Jul 27.

Prokhorov General Physics Institute of the Russian Academy of Sciences, Russia.

Terahertz (THz) technology holds strong potential for the intraoperative label-free diagnosis of brain gliomas, aimed at ensuring their gross-total resection. Nevertheless, it is still far from clinical applications due to the limited knowledge about the THz-wave-brain tissue interactions. In this work, rat glioma model 101. Read More

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Endoscope-assisted microsurgical retrosigmoid approach to the lateral posterior fossa: Cadaveric model and a review of literature.

Surg Neurol Int 2021 16;12:416. Epub 2021 Aug 16.

Division of Pediatric Neurosurgery, Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.

Background: The advancement of endoscopic techniques in the past decade has improved the surgical management of cerebellopontine angle (CPA) tumors. Endoscope-assisted microsurgery improves the ability to evaluate the extent of resection, achieve safe tumor resection and reduce the risk of surgery-related morbidity.

Methods: In this study, we used a cadaveric model to demonstrate a step by step endoscope-assisted microsurgery of the retrosigmoid approach to the lateral posterior fossa. Read More

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Combined Microscopic-Endoscopic Transmastoid Resection of a Petrous Meningioma: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 Sep 11. Epub 2021 Sep 11.

Department of Neurosurgery, Brigham and Women's Hospital, Harvard School of Medicine, Boston, Massachusetts, USA.

Petrous meningiomas are defined as tumors with a basal dural attachment on the posterior surface of the petrous bone.1 Their insertion can be anterior to the meatus (petrous apex meningiomas), or posterior to the meatus, with associated hyperostotic bony invasion either pre- or retro-meatal.2 These meningiomas are amenable to curative surgical removal and have better surgical outcomes than more medially located true petroclival meningiomas that originate medial to the fifth nerve. Read More

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September 2021

Clipping of Multiple Cerebral Aneurysms Through Cranioorbital Zygomatic Approach: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 Sep 11. Epub 2021 Sep 11.

Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Ruptured cerebral aneurysm is a grave disease, with a high morbidity and mortality, mandating securing the aneurysm to eliminate fatal rebleeding.1 Multiple aneurysms are frequent and may occur in approximately 20% of the cases with female prominence.2 The risk of subarachnoid hemorrhage in unruptured aneurysms is higher in patients who had prior ruptured aneurysms. Read More

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September 2021

Pentagon inside the 'Circle of Willis' and the Golden ratio.

World Neurosurg 2021 Sep 8. Epub 2021 Sep 8.

Department of Gastrointestinal surgery, Amrita Institute of Medical Sciences, Kochi, India.

The Golden ratio ('phi' or 'Ф') has been known to us for ages and its use in art and architectural designs has enhanced their exquisiteness. Even some of the astounding creations of nature do follow this principle of Golden or divine proportions. Three centuries ago 'Circle of Willis' at the base of the brain was first described and illustrated by Thomas Willis. Read More

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September 2021

Microanatomic study of the optic canal.

World Neurosurg 2021 Sep 7. Epub 2021 Sep 7.

Department of Neurosurgery, Hospital de Clinicas - UFPR - Curitiba-PR, Brazil.

Background: The continuous development of microsurgical techniques to treat lesions in and around the optic canal (OC) emphasizes the need for an accurate understanding of the microanatomy of the region.

Methods: Forty anatomic specimens were studied, with emphasis on the OC. The sphenoid bone and related structures were decalcified, added to animal gelatin, cut into 1 mm thick slices, and observed through a surgical microscope. Read More

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September 2021

Multiply Broken Metallic Hardware Removal for United Patella Fracture Applied Twenty Years Before: A Case Report.

JNMA J Nepal Med Assoc 2020 Nov 22;58(231):951-953. Epub 2020 Nov 22.

Nepalese Army Institute of Health Sciences, Sanobharyang, Kathmandu, Nepal.

Breakage of tension band wires, used to treat the patella fracture, is not uncommon several years after the fracture fixation. Broken wires may migrate to surrounding neurovascular structures, other vital organs like heart and may cause potentially fatal complications. Once the wires have been broken, it is very difficult to remove the broken pieces of metal wires. Read More

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November 2020

Four-Tunnel Double-Bundle Anatomical Posterior Cruciate Ligament Reconstruction Without Remnant Preservation.

Authors:
Jinzhong Zhao

Arthrosc Tech 2021 Sep 9;10(9):e2087-e2097. Epub 2021 Aug 9.

Department of Sports Medicine, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.

Double-bundle posterior cruciate ligament (PCL) reconstruction has long been attempted to obtain better clinical results than single-bundle PCL reconstruction. In most previous reports regarding double-bundle PCL reconstruction, one tibial tunnel and various kinds of grafts were used. We introduce a two-tibial tunnel, double-bundle PCL reconstruction technique with ultra-strong grafts. Read More

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September 2021

Robotic-Assisted Thoracoscopic Resection of the First Rib for Vascular Thoracic Outlet Syndrome: The New Gold Standard of Treatment?

J Clin Med 2021 Aug 31;10(17). Epub 2021 Aug 31.

Division of General Thoracic Surgery, Bern University Hospital, University of Bern, 3010 Bern, Switzerland.

In thoracic outlet syndrome (TOS) the narrowing between bony and muscular structures in the region of the thoracic outlet/inlet results in compression of the neurovascular bundle to the upper extremity. Venous compression, resulting in TOS (vTOS) is much more common than a stenosis of the subclavian artery (aTOS) with or without an aneurysm. Traditional open surgical approaches to remove the first rib usually lack good exposure of the entire rib and the neurovascular bundle. Read More

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Foramen Magnum Meningioma-The Attainment of the Intra-Arachnoidal Dissection: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 Sep 8. Epub 2021 Sep 8.

Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Ventral foramen magnum meningiomas are a forbidding lesion. The stake is so high with a risk of devastating paralysis and respiratory failure. Careful preoperative clinical and radiological evaluation is necessary to implement the best treatment plan. Read More

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September 2021

Unilateral aberrant anatomy of the hypoglossal nerve.

Surg Radiol Anat 2021 Sep 9. Epub 2021 Sep 9.

Oral and Maxillofacial Surgery, St George's University Hospitals NHS Foundation Trust, Blackshaw Road, Tooting, London, SW17 0QT, UK.

Purpose: Neck dissection is often performed in patients with oral cancer to both treat and reduce the risk of subsequent neck metastases. Injury to the hypoglossal nerve may result in dysarthria, dysphagia, and profound difficulty with upper airway control. Although surgical landmarks facilitate intra-operative identification of vital structures to be preserved, they should not be an absolute measure, due to anatomical variants. Read More

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September 2021

Variant neurovascular relations of the sphenoid sinus in adult Nigerians.

Niger Postgrad Med J 2021 Apr-Jun;28(2):112-116

Department of Human Anatomy and Cell Biology, Delta State University, Abraka, Nigeria.

Background: With the advent of endoscopic sinus surgery, the variant neurovascular relations of the sphenoid sinus are important to surgeons to minimise the iatrogenic complications. This study elucidates the variant neurovascular relations of the sphenoid sinus in adult Nigerians.

Materials And Methods: This study was conducted at the Radiology Department of Delta State University Teaching Hospital after institutional approval. Read More

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September 2021

Cortical hemodynamic mechanisms of reversal learning using high-resolution functional near-infrared spectroscopy: A pilot study.

Neurophysiol Clin 2021 Sep 1. Epub 2021 Sep 1.

INSERM U1105, Université de Picardie, GRAMFC, CURS, CHU Sud, rue René Laennec, 80036 Amiens Cedex 1, France; INSERM U1105, EFSN Pédiatrique, CHU Amiens sud, Avenue Laennec, 80054 Amiens cedex.

Objectives: Reversal learning is widely used to analyze cognitive flexibility and characterize behavioral abnormalities associated with impulsivity and disinhibition. Recent studies using fMRI have focused on regions involved in reversal learning with negative and positive reinforcers. Although the frontal cortex has been consistently implicated in reversal learning, few studies have focused on whether reward and punishment may have different effects on lateral frontal structures in these tasks. Read More

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September 2021

Thermal effects of thulium: YAG laser treatment of the prostate-an in vitro study.

World J Urol 2021 Sep 2. Epub 2021 Sep 2.

Department of Urology, Division of Urotechnology, Medical Centre, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, D-79106, Freiburg, Germany.

Purpose: To objectively determine whether there is potential thermal tissue damage during Tm:YAG laser-based LUTS treatment.

Methods: Our experimental model was comprised of a prostatic resection trainer placed in a 37 °C water bath. In a hollowed-out central area simulating the urethral lumen, we placed a RigiFib 800 fibre, irrigation inflow regulated with a digital pump, and a type K thermocouple. Read More

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September 2021

Primary malignant bone tumours of spine and pelvis in children.

J Child Orthop 2021 Aug;15(4):337-345

Orthopaedic Department, University Children's Hospital (UKBB), Basel, Switzerland.

Purpose: Axial malignant bone tumours are rare in children and adolescents, and their prognosis is still relatively poor due to non-specific symptoms, such as back or groin pain, which may result in late hospital presentation. Therefore, it is very important to raise awareness regarding this pathology.

Methods: We performed a narrative review, including scientific publications published in English. Read More

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[Treatment of neuropathy of inferior gluteal and pudendal nerves following periarticular synovial cyst of the hip joint. A case report and literature review].

Zh Vopr Neirokhir Im N N Burdenko 2021 ;85(4):64-68

Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.

The authors report a patient with neuropathy of inferior gluteal and pudendal nerves following periarticular synovial cyst of the hip joint. Effectiveness of treatment was analyzed. ENMG and MRI of pelvic soft tissues and hip joint were applied to confirm neuropathy of inferior gluteal and genital nerves. Read More

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September 2021

Transnasal endoscopic surgery of sphenoid meningocele associated with pituitary adenoma. A case report.

Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2021 Aug 24. Epub 2021 Aug 24.

Institute of Clinical and Molecular Pathology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic.

Background: Transsphenoid meningoencephalocele is a congenital anomaly formed by herniation of an ependyma delimited sac through a bony defect into the sphenoid sinus. The sac contains cerebrospinal fluid and neurovascular structures. The prevalence of transsphenoid meningoencephalocele in the adult population is rare. Read More

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Surgical Outcome of Large Solid Posterior Fossa Hemangioblastoma without Preoperative Embolization.

J Neurol Surg A Cent Eur Neurosurg 2021 Aug 25. Epub 2021 Aug 25.

Department of Neurosurgery, AIIMS, Raipur, Chhattisgarh, India.

Background:  Large solid hemangioblastoma in the posterior fossa has an abundant blood supply as an arteriovenous malformation. The presence of adjacent vital neurovascular structures makes them vulnerable and difficult to operate. Complete surgical resection is always a challenge to the neurosurgeon. Read More

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Soft tissue solitary fibrous tumors of the musculoskeletal system: spectrum of MRI appearances and characteristic imaging features.

Skeletal Radiol 2021 Aug 25. Epub 2021 Aug 25.

Department of Medical Imaging, Division of Musculoskeletal Imaging, Mount Sinai Hospital, University of Toronto, 600 University Avenue, Toronto, ON, M5G1X5, Canada.

Objective: Solitary fibrous tumors (SFTs) uncommonly occur in the musculoskeletal system, with limited available data on their MRI appearance. This study was performed to assess the MRI features of SFTs in the musculoskeletal system (MSK-SFTs).

Materials And Methods: Pre-treatment MRI in 39 patients with pathologically proven SFTs in the trunk or extremities was evaluated. Read More

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Flexor tendon injuries: Repair & Rehabilitation.

Injury 2021 Aug;52(8):2053-2067

Consultant Hand & Plastic Surgeon, Lothian Hand Unit, St John's Hospital, Livingston, West Lothian EH54 6PP, UK.

Flexor tendon injuries are common and occur mostly by penetrating trauma. Suspected flexor tendon injuries require a thorough clinical assessment and often are not isolated injuries. A detailed understanding of flexor tendon anatomy and spatial relationships is essential, especially when repairing multi-tendon injuries. Read More

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Endoscopic endonasal and transorbital approaches to petrous apex lesions.

J Neurosurg 2021 Aug 20:1-10. Epub 2021 Aug 20.

Departments of1Neurosurgery.

Objective: The petrous apex (PA) is one of the most challenging areas in skull base surgery because it is surrounded by numerous critical neurovascular structures. The authors analyzed the clinical outcomes of patients who underwent endoscopic endonasal approach (EEA) and transorbital approach (TOA) procedures for lesions involving PA to determine the perspectives and proper applications of these two approaches.

Methods: The authors included patients younger than 80 years with lesions involving PA who were treated between May 2015 and December 2019 and had regular follow-up MR images available for analysis. Read More

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The colocalizations of pulp neural stem cells markers with dentin matrix protein-1, dentin sialoprotein and dentin phosphoprotein in human denticle (pulp stone) lining cells.

Ann Anat 2021 Aug 13;239:151815. Epub 2021 Aug 13.

Department of Periodontology and Operative Dentistry, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.

Background: The primary dentin, secondary dentin, and reactive tertiary dentin are formed by terminal differentiated odontoblasts, whereas atubular reparative tertiary dentin is formed by odontoblast-like cells. Odontoblast-like cells differentiate from pulpal stem cells, which express the neural stem cell markers nestin, S100β, Sox10, and P0. The denticle (pulp stone) is an unique mineralized extracellular matrix that frequently occurs in association with the neurovascular structures in the dental pulp. Read More

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Misplaced S1 screw causing L5 radiculopathy, rare and unusual presentation: a report of 2 cases.

Br J Neurosurg 2021 Aug 16:1-5. Epub 2021 Aug 16.

Department of spine services, Indian Spinal Injuries Centre, New Delhi, India.

Many spine surgeons are not optimally acquainted with anatomy anterior to sacrum. Screw malposition injuring these structures can lead to unwanted lethal consequences. We report unusual cases of acute radiculopathy due to misplaced bicortical sacral screw causing L5 nerve root impingement on anterior sacrum. Read More

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