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Related Concept Videos

Cerebellum: Anatomical Regions01:17

Cerebellum: Anatomical Regions

The cerebellum, also known as the "little brain," is located in the posterior cranial fossa, inferior to the tentorium cerebelli and dorsal to the brainstem. It plays a significant role in motor control, coordination, and proprioception.
Cerebellar Structure
Externally, the cerebellum features a highly convoluted surface with numerous folia (narrow ridges) separated by shallow sulci (grooves). The cerebellum is divided into two hemispheres by a thin median structure known as the vermis. The...
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...
Alterations in Muscle Tone ll01:12

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
Role of Cerebellum and Prefrontal Cortex in Memory01:14

Role of Cerebellum and Prefrontal Cortex in Memory

The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the cerebellum's...
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.
Seizures ll: Types01:19

Seizures ll: Types

Seizures are sudden bursts of abnormal electrical discharge in the brain that interfere with normal function. They are commonly divided into three groups: focal seizures, generalized seizures, and other types that do not fit neatly into either category.Focal SeizuresFocal seizures begin in a single brain region. When awareness is preserved, they are called focal aware seizures and may cause sensations such as tingling, unusual smells, or flashing lights. When awareness is impaired, they are...

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Related Experiment Video

Updated: Jun 23, 2026

Cerebellar Regional Dissection for Molecular Analysis
08:51

Cerebellar Regional Dissection for Molecular Analysis

Published on: December 5, 2020

Cerebellar ataxias.

Mario Manto1, Daniele Marmolino

  • 1Fonds National de la Recherche Scientifique-Neurologie, Laboratoire de Neurologie Expérimentale, ULB, Bruxelles, Belgium. mmanto@ulb.ac.be

Current Opinion in Neurology
|May 8, 2009
PubMed
Summary
This summary is machine-generated.

Cerebellar ataxias are complex neurological disorders. Recent molecular discoveries offer new diagnostic frameworks and targeted therapies for these conditions, improving patient care.

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A Simple Composite Phenotype Scoring System for Evaluating Mouse Models of Cerebellar Ataxia
07:33

A Simple Composite Phenotype Scoring System for Evaluating Mouse Models of Cerebellar Ataxia

Published on: May 21, 2010

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Last Updated: Jun 23, 2026

Cerebellar Regional Dissection for Molecular Analysis
08:51

Cerebellar Regional Dissection for Molecular Analysis

Published on: December 5, 2020

A Simple Composite Phenotype Scoring System for Evaluating Mouse Models of Cerebellar Ataxia
07:33

A Simple Composite Phenotype Scoring System for Evaluating Mouse Models of Cerebellar Ataxia

Published on: May 21, 2010

Area of Science:

  • Neuroscience
  • Genetics
  • Neurology

Background:

  • Cerebellar ataxias present a spectrum of neurological disorders.
  • Patients may exhibit cerebellar syndrome alongside other symptoms like retinopathy, movement disorders, and neuropathy.
  • Phenotypic overlap complicates clinical diagnosis of genetic ataxia subtypes.

Purpose of the Study:

  • To review the current classification of cerebellar ataxias.
  • To highlight recent advances in molecular pathogenesis.
  • To provide a diagnostic framework and discuss emerging targeted therapies.

Main Methods:

  • Review of current literature on cerebellar ataxia classification and molecular pathogenesis.
  • Analysis of diagnostic challenges and therapeutic strategies.
  • Integration of motor control theories in understanding ataxia.

Main Results:

  • Cerebellar disorders are categorized into sporadic and inherited forms (autosomal recessive, autosomal dominant, episodic, X-linked).
  • Molecular discoveries are advancing the understanding of pathogenesis.
  • Theories on motor control involve neural representations and internal models.

Conclusions:

  • Molecular advances have significant implications for ataxia research and clinical practice.
  • A diagnostic framework for ataxias is presented.
  • Investigational therapies are now targeting specific deleterious pathways.