Cortex Care

The new video is release

https://youtu.be/DRxPtsEc3GE

1 month ago | [YT] | 2

Cortex Care

يلا يا شباب، الليلة منكمّل مشوارنا باLocalisation 🎯

الموديول الخامس: توطين الجهاز المحرّك للعين

شو رح نحكي فيه؟

كيف بتفرّق بين إصابة العصب الثالث والرابع والسادس
وين بالضبط الإصابة: جذع الدماغ، ولا الجيب الكهفي، ولا العصب نفسه
الشفع، الحول، والنظرات المتقارنة
وبالآخر، أسئلة اختيار من متعدد على طريقة البورد

اللي فاتو الموديول اللي قبل عن فحص العين واعتلالات العصب البصري، شوفوه قبل ما نبلّش، لأنه رح نبني عليه.

الليلة بالليل، استنّونا 🌙

1 month ago | [YT] | 0

Cortex Care

Tip of the Day, signs of Idiopathic Intracranial Hypertension on MRI :

High-specificity signs (low sensitivity; near-confirmatory when present)

Intraocular protrusion of the optic nerve head, the imaging correlate of papilloedema. Specificity approaches 95-100%; sensitivity is low (roughly 30%).
Optic nerve head enhancement on post-contrast fat-suppressed sequences. Uncommon but strongly associated with active disease.
Posterior globe flattening at the scleral insertion of the optic nerve. Specificity commonly reported above 90%; sensitivity is moderate (approximately 40-60%).
Meningoceles or arachnoid diverticula, particularly within Meckel's cave and along the petrous apex.
Skull base remodelling with cribriform plate or sphenoid roof thinning, sometimes with encephalocele and spontaneous CSF rhinorrhoea. A late, chronic finding.

High-sensitivity signs (lower specificity; supportive rather than diagnostic)

Empty or partially empty sella with flattening of the pituitary gland. Sensitivity is high (around 70-80%), but the sign is prevalent in obese women without raised pressure and in normal ageing.
Distension of the perioptic subarachnoid space, generally taken as an optic nerve sheath diameter exceeding 5-6 mm. Sensitivity is intermediate (roughly 45-70%); specificity is limited by measurement variability.
Vertical tortuosity of the intraorbital optic nerve. Frequently accompanies sheath distension; specificity in isolation is modest.

The best-performing single marker

Bilateral distal transverse sinus stenosis on MR venography, typically at the transverse-sigmoid junction. Both sensitivity and specificity are reported near 90%, which makes this the strongest individual discriminator. The stenosis may be extrinsic (smooth tapering) or intrinsic (arachnoid granulation). Unilateral stenosis carries considerably less weight given the frequency of hypoplastic sinuses.

Signs of poor diagnostic value

Slit-like or narrowed lateral ventricles. Historically cited but unreliable in adults.
Acquired cerebellar tonsillar descent. Present in a minority and non-specific.
Enlarged foramen ovale and widened optic canals. Descriptive only.

Practical synthesis

Individual signs perform modestly; combinations perform well. The presence of three or more of the four cardinal features (empty sella, posterior globe flattening, perioptic sheath distension with or without tortuosity, transverse sinus stenosis) yields high specificity.
This combination is what permits a diagnosis under the modified Dandy criteria when papilloedema and sixth nerve palsy are both absent.
Reported sensitivity and specificity figures vary substantially across series, reflecting differences in field strength, sequence selection, and control populations. The ranges above should be read as approximations rather than fixed operating characteristics.
The imaging protocol matters. Thin-section fat-suppressed T2 orbital sequences and dedicated MR venography materially increase yield relative to routine brain MRI.

1 month ago | [YT] | 1

Cortex Care

We now shared the slides used in localisation videos , follow me on Linkedin :

www.linkedin.com/in/majd-abualrob-m596/

1 month ago | [YT] | 2

Cortex Care

ما الموضوع الذي تودّون أن يكون أول حلقة من بداية جديدة في قناتنا؟ 🎥🧠

1 year ago | [YT] | 0

Cortex Care

Thanks everyone for those who supported our idea ❤️❤️❤️❤️

1 year ago | [YT] | 4

Cortex Care

1 year ago | [YT] | 2

Cortex Care

🚀 Big News from Cortex Care! 🚀
We’re excited to unveil three powerhouse series—each crafted to supercharge your neurology expertise:
✨ 1. Cortex Conversations
Deep-dive discussions on cutting-edge research, challenging case studies, and emerging therapies.
• Real-world takeaways you can apply tomorrow
📘 2. Bradley Review
Your ultimate companion to Bradley’s Neurology—one chapter at a time.
• Clear, concise summaries of core mechanisms
• High-yield clinical correlations perfect for boards
📍 3. NeuroPinpoint
Launching Friday, May 9, 2025—master the Art of Localization in bite-sized episodes.
• Step-by-step guides to map signs to anatomy
• Case-based drills to boost your diagnostic precision
🔔 Don’t miss out!
Follow Cortex Care for weekly drops, join the conversation, and elevate your neurology game—whether you’re a resident, researcher, or lifelong learner.
hashtag#Neurology hashtag#MedicalEducation hashtag#ClinicalNeuroscience hashtag#BoardPrep hashtag#CortexCare

1 year ago | [YT] | 3

Cortex Care

A 21-year-old woman with no prior medical history presents with generalized tonic-clonic seizures triggered by sleep deprivation and photic stimulation. Her EEG shows normal background with occasional generalized 4–6 Hz polyspike-and-wave discharges. She is started on lamotrigine but returns with worsening myoclonic jerks.

What is the most likely explanation for her clinical worsening?

1 year ago | [YT] | 12

Cortex Care

1 year ago | [YT] | 3