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Neuron Structure

Neuron Structure

Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
Structure and Function of Neurons
The neuronal cell body—the soma— houses the nucleus and organelles vital to cellular...

Neuron Structure

Neuron Structure

Golgi Apparatus

Golgi Apparatus

Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...

Golgi Apparatus

Golgi Apparatus

As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.The Golgi apparatus is a major sorting and dispatch station for the products of the ER. Newly arriving vesicles enter...

Transport Across the Golgi

Transport Across the Golgi

While it is unclear how molecules move between adjacent Golgi cisternae, it is apparent that the molecules move from cis- cisterna, the entry face, to the trans- cisterna, the exit face. Experiments initially suggested vesicles that bud from one cisterna and fuse with the next cisterna to transport proteins between the cisternae. This vesicular transport model describes the Golgi apparatus as a relatively static structure with a unique enzyme composition in each cisterna. Molecules are...

Neuronal Communication

Neuronal Communication

Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...

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Related Experiment Video

Updated: Jul 5, 2026

Imaging Neurons within Thick Brain Sections Using the Golgi-Cox Method

Imaging Neurons within Thick Brain Sections Using the Golgi-Cox Method

Published on: April 18, 2017

[Golgi, Cajal and neurophysiology].

Giovanni Berlucchi¹

¹Dipartimento di Scienze Neurologiche e della Visione, Sezione di Fisiologia, Università di Verona, I. giovanni.berlucchi@univr.it

Medicina Nei Secoli

|May 2, 2008

Summary

Neurohistology pioneers Golgi and Cajal overlooked physiological findings, impacting neuron theory development. Modern extrasynaptic communication evidence does not support Golgi's diffuse nerve net theory.

Area of Science:

Neuroscience
Neurohistology
Cell Biology

Background:

Historical divergence between neurohistology (Golgi, Cajal) and neurophysiology.
Golgi's distrust of physiological concepts and Cajal's limited use of Sherrington's synapse research.
Golgi's neuron theory vs. diffuse nerve net theory.

Discussion:

Revisiting Golgi's diffuse nerve net theory with evidence of extrasynaptic communication (e.g., volume transmission).
Examining historical attempts to reconcile Golgi's and neuron theories (Pensa, Moruzzi).
Critiquing the interpretation of extrasynaptic communication as proof of Golgi's nerve net.

Key Insights:

Extrasynaptic communication mechanisms do not validate Golgi's diffuse nerve net theory.
Golgi's significant contributions lie beyond his controversial nerve net hypothesis.

More Related Videos

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations

Published on: February 15, 2017

Related Experiment Videos

Last Updated: Jul 5, 2026

Imaging Neurons within Thick Brain Sections Using the Golgi-Cox Method

Imaging Neurons within Thick Brain Sections Using the Golgi-Cox Method

Published on: April 18, 2017

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations

Published on: February 15, 2017

The neuron theory, supported by synapse research, remains foundational in neuroscience.

Outlook:

Further research into the precise roles of extrasynaptic communication in neural function.
Re-evaluation of historical neuroscientific debates in light of contemporary findings.
Understanding the historical context of scientific theories and their evolution.