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Integration of Synaptic Events

Integration of Synaptic Events

Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...

Vision

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.

Visual System

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...

Neuroplasticity

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.

Motor and Sensory Areas of the Cortex

Motor and Sensory Areas of the Cortex

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.
Motor Areas
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.

Role of Hippocampus in Memory

Role of Hippocampus in Memory

The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...

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Related Experiment Video

Updated: Jul 3, 2026

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Published on: August 11, 2019

Synaptic plasticity from visual cortex to hippocampus: systems integration in spatial information processing.

Marian Tsanov¹, Denise Manahan-Vaughan

¹International Graduate School of Neuroscience and Medical Faculty, Department of Experimental Neurophysiology, Medical Faculty, Ruhr University Bochum, Germany.

The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry

|July 10, 2008

Summary

Synaptic plasticity allows the brain to store information and form memories. This review explores how visual cortex plasticity, driven by visual experience, may impact memory formation in the hippocampus.

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Last Updated: Jul 3, 2026

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Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents

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Simultaneous Two-photon In Vivo Imaging of Synaptic Inputs and Postsynaptic Targets in the Mouse Retrosplenial Cortex

Simultaneous Two-photon In Vivo Imaging of Synaptic Inputs and Postsynaptic Targets in the Mouse Retrosplenial Cortex

Published on: March 13, 2016

Area of Science:

Neuroscience
Cognitive Science

Background:

The adult brain, specifically the cerebral cortex, exhibits synaptic plasticity, a mechanism for altering neuronal connections based on experience.
Synaptic plasticity is fundamental to information storage and memory formation, involving long-lasting changes in synaptic strength.
The visual cortex plays a vital role in processing visual information and spatial memory, providing input to the hippocampus.

Purpose of the Study:

To review recent findings on dynamic synaptic plasticity in the adult visual cortex.
To explore how visual experience drives plasticity in the visual cortex.
To understand the influence of visual cortical plasticity on hippocampal plasticity and visuospatial information processing.

Main Methods:

Review of current scientific literature on synaptic plasticity in the visual and hippocampal cortices.
Analysis of studies investigating the relationship between visual experience and neuronal responses.
Synthesis of findings on the functional consequences of visuospatial information processing.

Main Results:

The adult visual cortex demonstrates dynamic synaptic plasticity in response to active visual experience.
This plasticity in the visual cortex is implicated in information processing relevant to memory formation.
Visual cortical plasticity may influence the induction and maintenance of plasticity in the hippocampus.

Conclusions:

Dynamic synaptic plasticity in the visual cortex is a key mechanism for processing visuospatial information.
Understanding visual cortex-hippocampus interactions is crucial for elucidating memory formation.
Further research is needed to fully comprehend the functional role of visual cortical plasticity in memory.