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Related Concept Videos

Electrical Synapses01:28

Electrical Synapses

Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Overview of Synapses01:25

Overview of Synapses

A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Junction Potentials in Galvanic Cells01:21

Junction Potentials in Galvanic Cells

The Nernst equation, derived under the assumption of thermodynamic equilibrium, calculates the electromotive force (emf) as the sum of potential differences at phase boundaries in a reversible cell without a liquid junction. However, in irreversible cells such as the Daniell cell, an additional potential difference named the liquid-junction potential (EJ) arises across the interface of two electrolyte solutions due to different ion diffusion rates. This EJ represents the potential difference...

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Related Experiment Video

Updated: Jun 10, 2026

A Functional Assay for Gap Junctional Examination; Electroporation of Adherent Cells on Indium-Tin Oxide
11:02

A Functional Assay for Gap Junctional Examination; Electroporation of Adherent Cells on Indium-Tin Oxide

Published on: October 18, 2014

Enhanced functions of electrical junctions.

Barry W Connors1, Timothy A Zolnik, Seung-Chan Lee

  • 1Department of Neuroscience, Box GL-N, Brown University, Providence, RI 02912, USA. bc@brown.edu

Neuron
|August 11, 2010
PubMed
Summary
This summary is machine-generated.

Electrical synapses synchronize resting activity in cerebellar Golgi cells. However, they also cause surround inhibition and desynchronization when responding to excitatory input, broadening their known functions.

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Last Updated: Jun 10, 2026

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Cut-loading: A Useful Tool for Examining the Extent of Gap Junction Tracer Coupling Between Retinal Neurons
10:11

Cut-loading: A Useful Tool for Examining the Extent of Gap Junction Tracer Coupling Between Retinal Neurons

Published on: January 12, 2012

Area of Science:

  • Neuroscience
  • Cellular Neuroscience
  • Synaptic Transmission

Background:

  • Electrical synapses are traditionally associated with synchrony.
  • The role of electrical synapses in complex neural networks is still being explored.

Discussion:

  • This study investigates the function of electrical synapses within the cerebellar Golgi cell network.
  • The findings challenge the simple association between electrical synapses and synchrony.

Key Insights:

  • Electrical synapses in Golgi cells synchronize resting neural activity.
  • These synapses mediate surround inhibition and desynchronization upon excitatory input.
  • This reveals a dual role for electrical synapses in neural circuit function.

Outlook:

  • Further research into the precise mechanisms of Golgi cell electrical synapses.
  • Exploring the implications of these findings for cerebellar computation and information processing.
  • Investigating whether similar dual roles exist for electrical synapses in other brain regions.