Notes
A collection of fragments of understanding in the pursuit of deeper questions.
Contents
- Computational Vision
- Introduction to Data Science
- Translational Neuromodeling
- Deep Learning in Artificial & Biological Neuronal Networks
- Introduction to Neuroinformatics
- Intro to Neuroscience
- Systems Neuroscience
- Readings in Neuroinformatics
- Neurobiology of Consciousness
- Econometrics
- Principles of Finance
- Big Data & Databases
- Game Theory
- Intro to Blockchain
- Marketing Analytics
- Financial Accounting
- Fundamentals of Computer Science
- Foundamentals of Information Technology Law
- Statistics
- Computer Programming
- Macroeconomics
- EU Information Law & Data Economy
- Advanced Mathematics & Statistics
- Principles of Management
- Mathematics
- Microeconomics
Adaptation
Motion-after effect due to adaptation. It is a perceptual phenomenon in which a stationary stimulus appears to move in the opposite direction after prolonged exposure to a moving stimulus. This effect occurs because the visual system adapts to the prolonged motion in one direction, causing a temporary imbalance in the neural response to motion.
The motion aftereffect can be explained by the process of adaptation, which is a fundamental property of the visual system. Adaptation refers to the ability of neurons in the visual system to adjust their sensitivity to a particular stimulus feature based on prior exposure. In the case of the motion aftereffect, prolonged exposure to a moving stimulus causes neurons in the visual system to adapt to the specific direction and speed of motion. This adaptation results in a decreased response to the adapted motion and an increased response to the opposite motion, which leads to the perception of motion in the opposite direction.
Adaptation is an important mechanism for the visual system to adjust to changes in the environment and maintain sensitivity to relevant stimuli. It allows the visual system to filter out unchanging or irrelevant features of a visual scene and focus on relevant information. In addition to the motion aftereffect, adaptation is responsible for a wide range of perceptual phenomena, including color aftereffects, orientation aftereffects, and size aftereffects.
Adaptation in a V1 Neuron (Violates Linearity)
The figure above describes one of the first experiments that showed contrast adaptation in the cortex. They presented a low-contrast stimulus to one eye. Then in the other eye they presented a high-contrast stimulus. Finally, they present again the low-contrast stimulus to the left eye and they measured that the response is lower than the response elicited during the first stimulus presentation. In addition, we can see that the adaptation occurs also during the presentation of the high-contrast stimulus as the neuronal response decreases over time.
Contrast Adaptation Controls V1 Neuron Sensitivity
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