Nmda Antagonist
Nmda Antagonist - Related Videos
01:30
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
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2024
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function. They...
07:11
Examination of Anatomical Features of Retinal Ganglion Cells Under N-methyl-D-aspartic Acid (NMDA)-induced Excitotoxicity
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2025
Here, we describe the use of a genetically directed alkaline phosphatase (AP) labeling method to investigate the anatomical features and phenotypes of mouse retinas under NMDA-induced excitotoxicity. In conjunction with several retinal ganglion cell (RGC) subtype-specific reporter lines, we uncover novel phenotypes in dying RGCs throughout the degenerative process.
06:42
Application of a NMDA Receptor Conductance in Rat Midbrain Dopaminergic Neurons Using the Dynamic Clamp Technique
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Cited by 5 •
2010
In this video, we demonstrate how to apply a conductance into a dopaminergic neuron recorded in the whole cell configuration in rat brain slices. This technique is called the dynamic clamp.
01:24
Cholinergic Antagonists: Pharmacokinetics
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2023
Cholinergic antagonists—such as antimuscarinics—are available in oral, topical, ocular, parenteral, and inhalational formulations. Most antimuscarinics are oral formulations, while scopolamine is available as a topical patch, and ipratropium and tiotropium are available as inhalation aerosols or powders. Atropine, tropicamide, and cyclopentolate are topically instilled in the eye. Most antimuscarinics are lipid-soluble and readily absorbed from the gastrointestinal tract and the conjunctiva.
01:26
Cholinergic Antagonists: Therapeutic Uses
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2023
Antimuscarinic drugs have various therapeutic applications by inhibiting parasympathetic stimulation in different systems. Here are the key therapeutic uses of antimuscarinics: Respiratory Tract: Ipratropium, aclidinium, and tiotropium treat asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). They protect against bronchoconstriction caused by irritants like cigarette smoke, sulfur dioxide, and ozone. They also help reduce nasopharyngeal secretions in common...
FAQs
Binding within or near the NMDA receptor channel restricts activity-dependent ion movement rather than simply eliminating all receptor-related signaling. This limitation is especially important for calcium influx, because excessive calcium entry is associated with heightened neuronal excitation. The resulting reduction in receptor activity helps pharmacologists examine how excitatory signaling changes when channel-mediated ion flow is constrained.
Calcium influx provides a key link between NMDA receptor activity and downstream neuronal effects. When an NMDA antagonist limits this ion movement, investigators can study reduced excitatory drive and mechanisms associated with excessive neuronal activation. This focus is relevant to research on excitotoxicity, a process involving harmful overexcitation, as well as altered synaptic transmission.
The pharmacological challenge is to reduce excessive receptor signaling without producing unwanted cognitive or motor effects. NMDA antagonists therefore provide a model for examining the relationship between degree of receptor inhibition and functional outcome. Their effects help researchers investigate how changes in excitatory neurotransmission can support therapeutic strategies while also creating limitations that must be considered.
Researchers use these compounds to alter signaling through glutamate-gated NMDA receptors and then examine consequences for excitotoxicity, synaptic transmission, and synaptic plasticity. Because the receptors participate in activity-related neuronal communication, reducing their signaling provides a pharmacological way to study how excessive excitation and changes in transmission affect nervous-system function.
NMDA antagonists contribute to research and treatment strategies involving anesthesia, analgesia, neurodegenerative disease, and neurological injury. Ketamine, memantine, and dextromethorphan are examples identified in this context. Their inclusion across these areas reflects the broader value of modifying NMDA receptor signaling when investigators are studying pain processing, neuronal excitation, or disease-related nervous-system changes.
Applying an NMDA antagonist allows investigators to evaluate changes in ion movement, neuronal excitation, and synaptic transmission. The observed effects can also inform studies of pain processing, excitotoxicity, neurological injury, and neurodegenerative disease. Comparing these outcomes helps clarify how receptor inhibition influences nervous-system function and whether reduced signaling aligns with a particular research or treatment strategy.