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Related Concept Videos

Cerebellum: Anatomical Regions01:17

Cerebellum: Anatomical Regions

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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.
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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...
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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...
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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...
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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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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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A Standardized Pipeline for Examining Human Cerebellar Grey Matter Morphometry using Structural Magnetic Resonance Imaging
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The cerebellum.

Megan R Carey1

  • 1Neuroscience Program, Champalimaud Center for the Unknown, Lisbon, Portugal.

Current Biology : CB
|January 9, 2024
PubMed
Summary
This summary is machine-generated.

The cerebellum, a complex neural structure, contains over half the body's neurons. Despite its traditional motor role, it significantly influences cognitive functions through extensive brain connections.

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Area of Science:

  • Neuroscience
  • Cerebellar research
  • Neuronal architecture

Background:

  • The cerebellum, located at the brain's posterior, houses over 50% of the nervous system's neurons.
  • Its structure is conserved across vertebrates, with evolutionary expansion paralleling the cerebral cortex.
  • Cerebellar neuronal architecture and connectivity have been studied for over a century.

Purpose of the Study:

  • To provide an overview of the cerebellum's structure, function, and connectivity.
  • To highlight the cerebellum's role beyond motor control.
  • To emphasize the detailed understanding of cerebellar cell types and circuits.

Main Methods:

  • Review of historical and modern neuroscience research.
  • Analysis of anatomical and physiological data.
  • Exploration of molecularly distinct cerebellar cell types.

Main Results:

  • The cerebellum possesses a highly organized neuronal architecture.
  • Molecularly distinct cell types in the cerebellum are uniquely identifiable.
  • The cerebellum exhibits extensive interconnections with various brain regions.

Conclusions:

  • The cerebellum's intricate circuitry supports functions beyond motor control.
  • Its connectivity suggests a significant role in cognitive processes.
  • Modern neuroscience continues to reveal the cerebellum's complex influence on brain function.