Skip to main content

Energy Manifold Natural Gradient Descent: From Riemannian Optimization to Modern Neuroscience, NeuroAI and Quantum Physics

Dr. Rishabh Pathak
When Geometry, Energy, Artificial Intelligence and Neuroscience Converge Modern Artificial Intelligence is rapidly moving beyond the idea that learning simply means minimizing an error function. Increasingly, researchers are asking a deeper question: what is the structure of the space in which learning takes place? This question becomes particularly important when the system being modelled is constrained, nonlinear, dynamic, or governed by physical principles. A recent work titled “Energy Manifold Natural Gradient Descent: Riemannian Optimization for Neural PDE Solvers” , by Zhangyong Liang and Huanhuan Gao, introduces Energy Manifold Natural Gradient Descent (EMNGD) , a mathematical framework that extends energy-based natural-gradient optimization from unconstrained Euclidean parameter spaces to constrained Riemannian parameter manifolds . At its core, the framework proposes a simple but powerful principle: An optimization algorithm should not only determine how to reduce error; it sh...
Post a Comment

Glossokinetic Artifacts

Image
Dr. Rishabh Pathak

Glossokinetic artifacts in EEG recordings are a type of artifact related to movements of the tongue muscles. 

1.     Description:

o    Glossokinetic artifacts are artifacts caused by movements of the tongue muscles, which can introduce electrical activity that contaminates the EEG signal.

2.   Characteristics:

o Location: Glossokinetic artifacts typically affect electrodes near the mouth or tongue region where the muscle movements are occurring.

o Amplitude: The amplitude of glossokinetic artifacts may vary depending on the intensity of tongue movements and the proximity to the recording electrodes.

3.   Identification:

o Glossokinetic artifacts can be identified by their association with specific muscle movements in the tongue region and their distinct waveform characteristics.

o These artifacts may manifest as sudden changes in the EEG signal coinciding with tongue movements.

4.   Clinical Relevance:

oRecognizing glossokinetic artifacts is important for distinguishing them from genuine brain activity during EEG interpretation.

o  Failure to identify and differentiate glossokinetic artifacts can lead to misinterpretation of EEG findings and incorrect clinical assessments.

5.    Artifact Mitigation:

oStrategies to mitigate glossokinetic artifacts include minimizing movements in the tongue region during EEG recordings and ensuring proper electrode placement to reduce artifact contamination.

oSignal processing techniques, such as artifact removal algorithms, can also help in reducing the impact of glossokinetic artifacts on EEG data quality.

Understanding the characteristics and implications of glossokinetic artifacts is essential for EEG technologists and clinicians to ensure accurate interpretation of EEG recordings and reliable clinical assessments. Proper identification and management of glossokinetic artifacts contribute to obtaining high-quality EEG data for effective diagnosis and treatment planning.

 

Categories:

Comments

Post a Comment

Popular posts from this blog

Review Settings of EEG

Dr. Rishabh Pathak
The review settings of an EEG recording refer to the parameters that can be adjusted to optimize the visualization and interpretation of electrical brain activity. Here is an overview of the key review settings in EEG analysis: 1.       Amplification (Gain/Sensitivity) : o Definition : Amplification, also known as gain or sensitivity, determines how much the electrical signals from the brain are amplified before being displayed on the EEG recording. o Measurement : Typically measured in microvolts per millimeter (μV/mm). o Impact : Adjusting the amplification setting can affect the visibility of high-amplitude and low-amplitude activity. High-amplitude activity may require vertical compression to fit within the display range, while low-amplitude activity may require lower sensitivity settings for better visualization. 2.      Frequency Filtering : o Bandpass : The frequency range within which EEG signals are analyzed. Common settings include ...
Post a Comment
Read more

Cancellous Bone

Dr. Rishabh Pathak
Cancellous bone, also known as trabecular or spongy bone, is the other main type of bone tissue found in the human skeleton alongside cortical bone. Cancellous bone has a porous and lattice-like structure, providing flexibility, shock absorption, and a site for hematopoiesis (blood cell formation). Here are key features and characteristics of cancellous bone: 1.     Structure : o     Trabeculae : Cancellous bone is composed of a network of thin, bony trabeculae that form an interconnected lattice structure. o     Bone Marrow : The spaces between trabeculae contain red bone marrow, which is involved in the production of blood cells (hematopoiesis). o     Less Compact : Cancellous bone is less dense and compact than cortical bone, with a higher surface area-to-volume ratio. 2.     Composition : o     Trabecular Bone : The trabeculae are made up of lamellae, osteocytes, and canaliculi similar to corti...
Post a Comment
Read more

Control Variables

Dr. Rishabh Pathak
Control variables play a crucial role in research methodology by helping researchers isolate the effects of independent variables on the dependent variable. Here are key points to understand about control variables: 1.     Definition : o   Control variables  are factors that are held constant or systematically varied by the researcher to prevent them from confounding the relationship between the independent and dependent variables. By controlling for these variables, researchers can more accurately assess the impact of the independent variable on the outcome of interest. 2.     Role : o     Control variables are used to reduce the influence of extraneous variables and other sources of variability that could potentially affect the dependent variable. By controlling for specific factors that are not the focus of the study but could impact the results, researchers can enhance the internal validity of their research. 3.   ...
Post a Comment
Read more

Translocation, Retention and Potential Neurological Lesion in The Brain and Following Nanoparticle Exposure

Dr. Rishabh Pathak
Translocation, retention, and potential neurological lesions in the brain following nanoparticle exposure are important considerations in nanotoxicology and neurotoxicology research. Here are some key points regarding the impact of nanoparticle exposure on the brain: 1.       Translocation to the Brain : o Nanoparticles can enter the brain through various routes, including systemic circulation, olfactory nerve pathways, and disrupted blood-brain barrier (BBB) integrity. o Factors such as nanoparticle size, surface properties, shape, and surface modifications influence their ability to cross biological barriers and reach the brain parenchyma. 2.      Retention in the Brain : o Once nanoparticles translocate to the brain, they may exhibit different retention times depending on their physicochemical properties and interactions with brain cells. o Nanoparticles can accumulate in specific brain regions, such as the olfactory bulb, hippocampus, and...
Post a Comment
Read more

Regressive Events in the Postnatal Period

Dr. Rishabh Pathak
Regressive events in the postnatal period refer to processes in brain development that involve the elimination or reduction of certain neural elements, such as neurons and glial cells, to refine and optimize neural circuits. These regressive events are essential for sculpting the developing brain and ensuring its proper functioning. Here are key points regarding regressive events in the postnatal period: 1.      Cell Death in Glial Populations : o     While neural apoptosis peaks during prenatal development, apoptosis in glial cell populations occurs postnatally and is essential for the refinement of neural circuits. o     Glial cells, particularly oligodendrocytes, undergo apoptosis after differentiating, with signals from nearby axons influencing the survival of oligodendrocytes to match the local axonal surface area, a process crucial for myelination and neural connectivity. 2.      Synaptic Pruning : o  ...
Post a Comment
Read more