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neurosurgery principles

01/09/2025

secrets of skull base ( sellar approaches )

23/08/2025

Just for simplicity
there are three types of brainstem nuclei that are connected to the cerebellum (ipsilaterl) to coordinate movements. all of them are located anteriorly in the corresponding regions of the brainstem and connected to the cerebellum via the corresponding peduncle . They are red nucleus, pontine nuclei and inf olive
all of them are connected to the contralateral cortex .

28/07/2025

When you see multiple SOL in old age , there are two main possibilities . Metastasis & primary CNS lymphoma (PCNSL) . but usually.,
- Metastasis tend to appear in the gray white junction due to the presence of microvasculature at this region which slows the flow velocity and has small lumen helping the large tumor cells to lodge .
- PCNSL : tend to appear in the deep structures around the ventricles due to the plenty of lymphocytes

gliomatosis is another possibility but it is rare

12/07/2025

When you first enter the retrosigmoid corridor, the exact location of the internal auditory canal (IAC) may not be obvious.
In such cases, the suprameatal tubercle serves as a key bony landmark to locate the canal.
however, if the tubercle is prominent or enlarged, it can become an obstacle, obscuring the view of the IAC and requiring careful drilling.

17/06/2025

High grade meningiomas and gliomas usually show restricted diffusion while the low grades of both of them usually don't

02/05/2025

the link is in the 1st comment

25/04/2025

The post central gyrus ( sensory area ) is directly connected to the superior parietal lobule by a gyral bridge . This makes the superior parietal lobule to be continously and immediately informed by the sensory data to perform its function of spatial orientation of the whole body . through this bridge we can localise the superior parietal lobule .
see more about the localisation of language and visual areas in this video ( localisation in MRI brain _ part 2 )
The link is in the 1st comment

18/04/2025

Identification of cortical landmarks - part 1 - motor & sensory areas .
a new video
The link is in the 1st comment

11/04/2025

craniocerebral topography continued
craniometric points part 3
The link is in the 1st comment

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