biology

Paroxysmal attack

Paroxysmal attack is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Paroxysmal attack rather than just read about it. In short: Paroxysmal attacks or paroxysms are a sudden recurrence or intensification of symptoms, such as a spasm or seizure. These short, frequent symptoms can be observed in various clinical conditions.

Key takeaways

Paroxysmal attack belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Paroxysmal attack to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Paroxysmal attack from memory before moving on to harder problems.

Reference excerpt

Paroxysmal attacks or paroxysms are a sudden recurrence or intensification of symptoms, such as a spasm or seizure. These short, frequent symptoms can be observed in various clinical conditions. They are usually associated with multiple sclerosis or pertussis, but they may also be observed in other disorders such as encephalitis, head trauma, stroke, autism, asthma, trigeminal neuralgia, breath-holding spells, epilepsy, malaria, tabes dorsalis, Behçet's disease, and paroxysmal nocturnal hemoglobinuria (PNH). It has also been noted as a symptom of gratification disorder in children. The word paroxysm means 'sudden attack, outburst' and comes from Greek παροξυσμός (paroxusmós) 'irritation, exasperation'. Paroxysmal attacks in various disorders have been reported extensively, and ephaptic coupling of demyelinated nerves has been presumed as one of the underlying mechanisms of this phenomenon. This is supported by the presence of these attacks in multiple sclerosis and tabes dorsalis, which both involve demyelination of spinal cord neurons. Exercise, tactile stimuli, hot water, anxiety, and neck flexion may provoke paroxysmal attacks. Most reported paroxysmal attacks are painful tonic spasms, dysarthria and ataxia, numbness, and hemiparesis. They are typically different from other transient symptoms by their brevity (lasting no more than 2 minutes), frequency (from 1–2 times/day up to a few hundred times/day), stereotyped fashion, and excellent response to drugs (usually carbamazepine). Withdrawal of symptoms without any residual neurological finding is another key feature in their recognition.

See also BPPV Convulsion Female hysteria for "hysterical paroxysm" Relapse or remission, where symptoms become worse or better

References

Worked examples

Example 1 — a first encounter with Paroxysmal attack

Start with the simplest possible case. Write down what Paroxysmal attack claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Paroxysmal attack before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Paroxysmal attack ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Paroxysmal attack

In research: Paroxysmal attack appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Paroxysmal attack in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Paroxysmal attack is common in secondary-school and first-year university syllabi. It links to neighbouring topics Neurological disorders, so understanding it makes those chapters shorter.
In everyday life: Look for Paroxysmal attack outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Paroxysmal attack in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Paroxysmal attack means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Paroxysmal attack out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Paroxysmal attack in simple terms?

Paroxysmal attacks or paroxysms are a sudden recurrence or intensification of symptoms, such as a spasm or seizure. These short, frequent symptoms can be observed in various clinical conditions.

Why does Paroxysmal attack matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Paroxysmal attack?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Paroxysmal attack.