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Related Concept Videos

Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the subthalamic...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological states or needs.
Encephalitis ll: Pathophysiology01:26

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Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
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Cranial and Spinal Meninges

The cranial and spinal meninges are complex protective structures surrounding the central nervous system (CNS), consisting of the brain and spinal cord. These meninges consist of the dura mater, the arachnoid mater, and the pia mater. They protect the CNS, provide structural support, and aid in circulating cerebrospinal fluid (CSF).
Cranial Meninges
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Anatomy of the Brain: Ventricles01:18

Anatomy of the Brain: Ventricles

There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen. The...

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Updated: May 28, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
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Published on: July 5, 2021

[Neuroepithelial thalamo-mesencephalic cyst].

A Cherif El Asri1, A Akhaddar, O Naama

  • 1Department of neurosurgery, Military hospital, Rabat, Maroc. abad20031@hotmail.com

Neuro-Chirurgie
|October 28, 2011
PubMed
Summary

Thalamo-mesencephalic neuroepithelial cysts are rare central nervous system lesions. Imaging analysis is key for diagnosing these cysts, with mini-invasive procedures indicated for symptomatic cases.

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Endoscopic Approach for Colloid Cyst Resection
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Area of Science:

  • Neuroscience
  • Neuropathology

Background:

  • Thalamo-mesencephalic neuroepithelial cysts are uncommon central nervous system (CNS) lesions.
  • These cysts originate from neuroectoderm and are sometimes termed ependymal cysts.

Observation:

  • A 42-year-old woman presented with thalamic syndrome.
  • The syndrome was caused by a neuroepithelial cyst located in the thalamo-midbrain region.

Findings:

  • Detailed analysis of imaging features facilitated the diagnosis of the thalamo-midbrain cyst.
  • Differential diagnosis considered other cystic brain lesions.

Implications:

  • Neuroepithelial cysts can be asymptomatic or symptomatic.
  • Symptomatic thalamo-mesencephalic neuroepithelial cysts may require mini-invasive procedures for management.