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Related Concept Videos

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...
Cerebellum: Anatomical Regions01:17

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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...
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.
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...
Equilibrium and Balance01:15

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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
The Vestibular System01:29

The Vestibular System

The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.

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Related Experiment Video

Updated: Jun 29, 2026

Cerebellar Regional Dissection for Molecular Analysis
08:51

Cerebellar Regional Dissection for Molecular Analysis

Published on: December 5, 2020

State estimation in the cerebellum.

R Chris Miall1, Dominic King

  • 1School of Psychology, University of Birmingham, Birmingham, UK. r.c.miall@bham.ac.uk

Cerebellum (London, England)
|October 16, 2008
PubMed
Summary
This summary is machine-generated.

The cerebellum predicts limb position by integrating motor commands and sensory signals. This study shows the cerebellum updates this state estimate over 120-140 ms, crucial for accurate motor control.

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Cerebellar Regional Dissection for Molecular Analysis
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A Standardized Pipeline for Examining Human Cerebellar Grey Matter Morphometry using Structural Magnetic Resonance Imaging
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A Standardized Pipeline for Examining Human Cerebellar Grey Matter Morphometry using Structural Magnetic Resonance Imaging

Published on: February 4, 2022

Area of Science:

  • Neuroscience
  • Motor Control
  • Computational Neuroscience

Background:

  • The cerebellum is hypothesized to perform state estimation, integrating motor efference copies and sensory feedback.
  • Sensory pathway delays necessitate predictive mechanisms for accurate motor control.
  • Previous research indicated cerebellar state estimation errors of approximately 138 ms during reaching movements.

Purpose of the Study:

  • To investigate the role of the cerebellum in predictive state estimation.
  • To determine if TMS-induced errors reflect cerebellar processing time or stimulus duration.
  • To refine the estimated time interval for cerebellar predictive updating.

Main Methods:

  • Healthy subjects performed rapid reaching movements towards visual targets.
  • Ipsilateral cerebellar transcranial magnetic stimulation (TMS) was applied with varying pulse train durations (1, 2, or 3 pulses).
  • Movement errors in initial direction and final finger position were analyzed.

Main Results:

  • Movement errors were largely insensitive to TMS pulse train duration.
  • Increasing TMS train duration by 100 ms only altered the estimated hand position mislocalization by 12 ms.
  • This suggests the observed time interval reflects cerebellar processing, not TMS artifact.

Conclusions:

  • The cerebellum predictively updates a central state estimate over a consistent interval of approximately 120-140 ms.
  • This predictive updating is crucial for compensating for sensory delays.
  • Cerebellar dysfunction impairs this predictive state estimation, leading to motor errors.