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Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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...
Epilepsy ll: Types01:22

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.
Encephalitis l: Introduction01:19

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Lissencephalic syndromes: brain and beyond.

Lorenzo Pavone1, Giovanni Corsello, Piero Pavone

  • 1Unit of Clinical Paediatrics, Department of Paediatrics, University of Catania, Italy.

Frontiers in Bioscience (Scholar Edition)
|December 29, 2009
PubMed
Summary
This summary is machine-generated.

Lissencephaly, a brain malformation, is now understood to affect multiple organs, presenting diverse clinical conditions. Research highlights its complex genetic basis and systemic impact beyond the brain.

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Lissencephaly, characterized by smooth brain surfaces (agyria/pachygyria), results from abnormal neuronal migration.
  • Historically viewed as a brain-only malformation, it presents significant clinical heterogeneity.
  • Classifications are evolving with new molecular data, identifying distinct subtypes.

Purpose of the Study:

  • To review the current understanding of lissencephaly, emphasizing its systemic involvement.
  • To discuss the heterogeneity of lissencephalic syndromes and their genetic underpinnings.
  • To highlight the broad spectrum of clinical manifestations and affected organs.

Main Methods:

  • Literature review of lissencephaly classifications and genetic associations.
  • Synthesis of data on clinical presentations and affected organ systems.
  • Discussion of diagnostic criteria and emerging molecular insights.

Main Results:

  • Lissencephaly involves not only the brain but also eyes, face, muscles, heart, and bones.
  • Key clinical signs include intellectual disability and drug-resistant epilepsy.
  • Four main groups are recognized: classic variants, other lissencephalies, microlissencephaly spectrum, and cobblestone malformations.

Conclusions:

  • Lissencephaly is a complex syndromic spectrum with multi-organ involvement.
  • Understanding the genetic and molecular basis is crucial for accurate classification and management.
  • Further research is needed to unravel the full extent of this malformation's impact.