biology

Palmar crease

Palmar crease 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 Palmar crease rather than just read about it. In short: A palmar crease is a type of crease on the palm. A single transverse palmar crease also called simian crease is sometimes associated with Down syndrome.

Key takeaways

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

Reference excerpt

A palmar crease is a type of crease on the palm. A single transverse palmar crease also called simian crease is sometimes associated with Down syndrome. Other types of creases include the Sydney crease and the Suwon, or double transverse palmar crease. Analysis of palmar creases is not very objective on the contrary to fingerprint analysis. Palmar creases are sometimes used as a preoperative landmark for identification of deep anatomical structures. This method was shown to be unuseful.

References

Illustrations

Worked examples

Example 1 — a first encounter with Palmar crease

Start with the simplest possible case. Write down what Palmar crease 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 Palmar crease 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 Palmar crease 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 Palmar crease

In research: Palmar crease 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 Palmar crease 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: Palmar crease is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anatomy stubs, Hand, so understanding it makes those chapters shorter.
In everyday life: Look for Palmar crease 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Palmar crease” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Palmar crease in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Palmar crease 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 Palmar crease out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Palmar crease in simple terms?

A palmar crease is a type of crease on the palm. A single transverse palmar crease also called simian crease is sometimes associated with Down syndrome.

Why does Palmar crease 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 Palmar crease?

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 Palmar crease.