Tonic Clonic Seizures
Tonic Clonic Seizures - Related Videos
07:35
Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
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2025
The protocol introduces an innovative method for analyzing and visualizing behaviors associated with pentylenetetrazole-induced seizures in mice. This approach extends beyond traditional Racine's scores, providing a more comprehensive evaluation of the diversity and temporal dynamics of ictal behaviors.
00:59
Tonicity in Animals
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2026
The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
01:16
Tonicity in Animals
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2023
Tonicity describes the amount of solute in a solution. The measure of the tonicity of a solution, or the total amount of solutes dissolved in a specific amount of solution, is called its osmolarity. Three terms—hypotonic, isotonic, and hypertonic—are used to relate the osmolarity of a cell to the osmolarity of the extracellular fluid that contains the cells. In a hypotonic solution, such as tap water, the extracellular fluid has a lower concentration of solutes than the fluid inside the cell,...
00:53
Tonicity in Plants
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2026
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.Plants and Hypotonic EnvironmentsUnlike animal cells,...
09:07
Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
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Cited by 4 •
2017
Electroconvulsive seizure (ECS) is an experimental animal model of electroconvulsive therapy for severe depression. ECS globally stimulates activity in the hippocampus, leading to synaptogenesis and synaptic plasticity. Here, we describe methods for ECS induction in rats and for subcellular fractionation of their hippocampi to examine seizure-induced changes in synaptic proteins.
FAQs
Voltage-gated sodium channels help regulate neuronal excitability and firing. Blocking these channels is one pharmacological strategy for reducing the excessive excitability associated with widespread abnormal activity. By limiting this excitability, sodium-channel-targeting antiseizure medicines may help restore a better balance between excitation and inhibition, supporting treatment decisions in neurological pharmacology.
Calcium channels represent another target for lowering neuronal excitability. Pharmacological modulation of these channels can reduce the tendency of neurons to participate in excessive synchronized firing. This mechanism complements sodium-channel blockade and gives clinicians and researchers more than one approach for developing or selecting antiseizure therapies.
Enhancing gamma-aminobutyric acid, or GABA, signaling strengthens inhibitory control within the nervous system. This can counter the loss of control that permits synchronized neuronal firing to spread. GABA-directed pharmacology is therefore important both for understanding how antiseizure treatments work and for identifying mechanisms that may suppress seizure activity.
Medication selection can be guided by the drug mechanism used to reduce neuronal excitability. Potential strategies include blocking voltage-gated sodium or calcium channels or enhancing GABA signaling. These mechanistic distinctions help connect a medicine’s action with the underlying abnormal firing and support more informed treatment planning in neurological pharmacology.
Urgent control of seizure activity is a central pharmacological priority, and benzodiazepines can provide that immediate control according to the supplied context. Their role is especially relevant to emergency management, where rapid suppression of ongoing abnormal activity matters. This emergency function differs from the broader task of selecting therapies for sustained seizure prevention.
These seizures provide an important context for evaluating whether therapies can reduce excessive neuronal excitability while supporting effective control. Research can compare sodium-channel, calcium-channel, and GABA-related strategies, as well as urgent benzodiazepine treatment. Understanding these mechanisms helps guide the development of antiseizure medicines intended to improve safety alongside seizure control.