The Neurosurgical Atlas

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The Neurosurgical Atlas

The Neurosurgical Atlas is the most popular and comprehensive resource for microsurgical techniques in the world.
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The Neurosurgical Atlas is the most comprehensive regularly updated atlas on the web, keeping neurosurgeons abreast of cutting edge technical nuances. We aim to teach techniques to improve patients' safety and surgical outcome. Our vast collection of surgical videos and illustrations provide a clear and concise road map while elucidating surgical nuances for proper completion of even the most difficult procedures. The site also features resources for patients at http://www.neurosurgicalatlas.com/video-conference-center

02/20/2026

In this operative video, Dr. Cohen demonstrates the clipping of a small ophthalmic artery aneurysm following a left frontotemporal craniotomy with extradural clinoidectomy.

A Carla knife is used to open the falciform ligament, providing additional proximal exposure along the internal carotid artery. A temporary clip is tested to confirm adequate control. With the proximal and distal neck fully visualized, an angled clip is placed across the aneurysm neck, with the blades aligned parallel to the long axis of the ICA. The origin of the ophthalmic artery is carefully protected during clip closure. Fluorescein and ICG angiography confirm complete exclusion of the aneurysm and patency of the ophthalmic artery and surrounding vessels.

Learn more here: https://zurl.co/EvQdr

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

02/02/2026

Pioneered in clinical practice at the Atlas Institute of Brain & Spine in Los Angeles, patient-specific “virtual brain twins” are helping neurosurgical teams rehearse complex cases before the OR—using ATLAS Simulation to create an ultra-realistic, AI-enhanced environment that supports safer trajectory planning, minimally invasive approach mapping, and coordinated OR ex*****on for greater precision and patient safety.

Read the announcement: https://zurl.co/WPKmH

Try Atlas Simulation: https://zurl.co/39hNm

01/15/2026

Eighteen years after trigeminal neuralgia surgery, receiving a heartfelt letter of gratitude from a patient is truly humbling. We are deeply grateful for the trust our patients place in us and honored to be part of care that can make a lasting difference.

This is why medicine is more than a profession—it’s a privilege.

12/22/2025

In this operative video, Dr. Cohen demonstrates the contralateral cross-court approach for clip ligation of a right P1 aneurysm through a left-sided pterional craniotomy.

The basilar artery, its bifurcation, and the contralateral P1 segment are exposed, revealing a perforating vessel arising from the neck of the P1 aneurysm. The cross-court approach is effective in this case, as the anatomy provides favorable visualization for circumferential dissection of the neck. A temporary clip is placed on the basilar trunk to allow controlled manipulation of the neck for definitive clip application. The narrow working space medial to the carotid artery is used to inspect the perforating vessels. A long straight clip is then applied to collapse the aneurysm neck, providing adequate visualization around the blades to preserve the perforators.

Learn more here: https://zurl.co/MhLWy

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

12/15/2025

In this operative video, Dr. Cohen demonstrates the bifrontal approach for resection of an anterior cranial base tumor extending into the nasal cavity.

The dural attachments are cut at the level of the cribriform plate, exposing a tumor that has eroded through the anterior fossa. Pituitary rongeurs are used to remove as much tumor as possible. Involved pieces of dura are further removed. In the more posterior aspect of the resection, the olfactory nerve is visualized and additional involved dura is excised. A demagnified view is provided to better demonstrate the operative field. As resection continues, the carotid artery within its bony encasement and the optic nerve covered by dura become visible. On final analysis, the tumor was confirmed to be a chondrosarcoma.

Learn more here: https://zurl.co/dLcgn

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

12/05/2025

We're proud to share that Dr. Aaron Cohen-Gadol has launched the ATLAS Institute of Brain & Spine in Los Angeles, expanding access to world-class care for complex brain and spine conditions.

Dr. Cohen is internationally recognized for pioneering techniques that remove some of the most complex tumors through small or no incisions—prioritizing safety, preservation of normal brain and spinal cord, and faster recovery.

The Institute will provide advanced surgical treatment for conditions including brain tumors, cerebrovascular disease (aneurysms, AVMs, cavernous malformations), and cranial nerve disorders such as trigeminal neuralgia and hemifacial spasm.

Find us at: https://zurl.co/ATLASInstitute

Read more here on PRNewswire: https://zurl.co/YvsCn

12/01/2025

In this operative video, Dr. Cohen demonstrates the retromastoid approach for resection of a root-type trigeminal schwannoma.

This portion of the operation involves dissecting the tumor from the root entry zone of the trigeminal nerve, where it is intimately associated with several fascicles. Piecemeal debulking continues as the nerve is seen adherent to the inferior pole of the tumor, requiring patience to avoid avulsion of intact trigeminal nerve fascicles. The ultrasonic aspirator is used to evacuate the fibrous portions of the tumor, exposing the nerve and the components embedded within the root entry zone and entering the tumor capsule.

Learn more here: https://zurl.co/xJlnj

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

11/26/2025

We’re proud to announce the Schwartz Collection, now available as part of The Neurosurgical Atlas’s video collection. This collection of nearly 200 videos is a comprehensive library of endoscopic surgical mastery by Theodore H. Schwartz, MD.

This master series distills more than two decades of Dr. Schwartz’s experience in endoscopic skull base surgery into a structured, case-based video curriculum.

Available now at https://zurl.co/SchwartzCollection

11/22/2025

In this operative video, Dr. Cohen demonstrates a frontotemporal approach for evacuation of a hematoma and clipping of an MCA aneurysm.

The Sylvian fissure, frontal lobe, and temporal lobe were exposed. A corticotomy was made at the site of hemorrhage to decompress the brain and access the aneurysm corridor. The hematoma was evacuated while leaving a clot over the dome for protection. The M1 segment was identified within the fissure and followed distally to the bifurcation. A temporary clip was applied to M1, and circumferential dissection of the aneurysm was carried out. A curved permanent clip was placed to completely exclude the aneurysm while preserving all branch vessels.

Learn more here: https://zurl.co/xpcp9

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

11/13/2025

In this operative video, Dr. Cohen demonstrates a combined retrosigmoid and supracerebellar approach for resection of a petroclival epidermoid cyst.

Working between the nerves, tumor fragments are removed circumferentially around the third cranial nerve. This complex tumor involves several cranial nerve complexes, characteristic of epidermoid tumors that encase rather than displace neurovascular structures. Small portions of tumor embedded along the posterior aspect of the fifth cranial nerve and its root entry zone are carefully removed. The fifth nerve is gently mobilized to expand the operative corridor through the supratrigeminal and infratrigeminal triangles. Dissection continues toward the sixth cranial nerve and the entry zone of the brainstem.

Learn more here: https://zurl.co/EyIZb

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

11/05/2025

In this operative video, Dr. Cohen demonstrates an orbitozygomatic approach for resection of a spheno-orbital meningioma.

The portion of periorbita infiltrated by tumor is separated from orbital fat, with resection limited at the level of the superior orbital fissure. The affected dura is then incised, and the intradural tumor is removed in standard fashion while preserving all arachnoid membranes. The middle meningeal artery is identified and coagulated, and the soft frontal dura involved by tumor is resected back to normal-appearing margins. Dural edges are coagulated to minimize recurrence. A free pericranial graft is used to reconstruct the dural defect, and the orbital rim and calvarial defect are reconstructed using an implant and titanium mesh.

Learn more here: https://zurl.co/E8ITX

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

10/29/2025

In this operative video, Dr. Cohen demonstrates the retromastoid approach for resection of a medium-sized acoustic neuroma.

The vestibulocochlear nerves are disconnected when hearing is non-functional preoperatively. The arachnoid bands are separated from the tumor capsule near the root exit zone of the facial nerve, maintaining intact peeled surfaces. Continuous mapping is performed with stimulation to confirm the course of the facial nerve and avoid overstimulation that may cause postoperative paresis. Once the tumor is mobilized anteriorly and the nerve fully visualized, ENT colleagues conduct the intracanalicular portion of the surgery. The dura over the internal auditory canal is stripped, and drilling achieves 270-degree skeletonization.

Learn more here: https://zurl.co/gLRLe

This post contains surgical content intended for educational use by medical professionals. Viewer discretion is advised.

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