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Cerebellum: Anatomical Regions

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...

Cerebrum: Anatomical Overview II

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...

Role of Cerebellum and Prefrontal Cortex in Memory

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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...

Motor and Sensory Areas of the Cortex

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....

Cerebrum: Anatomical Overview I

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The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...

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Updated: Sep 5, 2025

Cerebellar Regional Dissection for Molecular Analysis

Cerebellar Regional Dissection for Molecular Analysis

Published on: December 5, 2020

The Cerebellar Cortex.

Court Hull¹, Wade G Regehr²

¹Department of Neurobiology, Duke University School of Medicine, Durham, North Carolina, USA;

Annual Review of Neuroscience

|July 8, 2022

Summary

This summary is machine-generated.

The cerebellar cortex, once thought simple, shows surprising neuron and circuit diversity. Updating its framework is key to understanding cerebellar learning and function.

Keywords:

Purkinje cell cerebellar circuit cerebellar interneurons climbing fiber ephaptic signaling motor learning

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Area of Science:

Neuroscience
Computational Neuroscience
Systems Neuroscience

Background:

The cerebellum is crucial for learning and motor control.
Classical models proposed simple, repetitive cerebellar circuit modules.
These models assumed limited cell types and a single learning mechanism.

Purpose of the Study:

To review recent advances in cerebellar cortex research.
To highlight the complexity of cerebellar circuits and plasticity.
To propose an updated framework for understanding cerebellar learning.

Main Methods:

Review of recent experimental and theoretical studies.
Analysis of data on cerebellar neuron types and connectivity.
Synthesis of findings on synaptic plasticity mechanisms.

Main Results:

Emerging data reveal significant diversity in cerebellar neuron types and synaptic connections.
Multiple, regionally specific plasticity mechanisms contribute to cerebellar function.
A single, unified model of cerebellar learning is insufficient.

Conclusions:

The classical view of the cerebellum as a simple, uniform structure is outdated.
Understanding cerebellar function requires appreciating its cellular and circuit complexity.
An updated framework incorporating this diversity is necessary for future research on cerebellar learning.