biology

Lister's tubercle

Lister's tubercle 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 Lister's tubercle rather than just read about it. In short: Lister's tubercle or dorsal tubercle of radius is a bony prominence located at the distal end of the radius. It is palpable on the dorsum of the wrist.

Key takeaways

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

Reference excerpt

Lister's tubercle or dorsal tubercle of radius is a bony prominence located at the distal end of the radius. It is palpable on the dorsum of the wrist. It is named after Joseph Lister, though there is no evidence that he first described or identified it.

Structure Lister's tubercle is found on the dorsal distal radius. It varies in size and shape significantly. It can range from around 2 to 6 mm in height (averaging 3 mm), and around 6 to 26 mm in length (averaging 13 mm). Lister's tubercle consists of two peaks including radial peak and ulnar peak.

Function Lister's tubercle serves as a pulley for the tendon of extensor pollicis longus, which wraps around the medial side and takes a 45° turn.

Clinical significance Lister's tubercle is used as a useful landmark during wrist arthroscopy and other wrist surgery. It is palpable on the dorsum of the wrist. It is often difficult to clearly distinguish with radiography. Hyperextension of the wrist can lead to fracture of Lister's tubercle, as pressure is increased from the extensor pollicis longus tendon. An "island-shaped" fracture can also expose the tendon to a rough edge and lead to tendon rupture (usually long after the initial fracture).

References

Illustrations

Worked examples

Example 1 — a first encounter with Lister's tubercle

Start with the simplest possible case. Write down what Lister's tubercle 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 Lister's tubercle 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 Lister's tubercle 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 Lister's tubercle

In research: Lister's tubercle 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 Lister's tubercle 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: Lister's tubercle is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anatomy, Bones of the upper limb, Forearm, so understanding it makes those chapters shorter.
In everyday life: Look for Lister's tubercle 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 Lister's tubercle in 20 minutes

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

Frequently asked questions

What is Lister's tubercle in simple terms?

Lister's tubercle or dorsal tubercle of radius is a bony prominence located at the distal end of the radius. It is palpable on the dorsum of the wrist.

Why does Lister's tubercle 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 Lister's tubercle?

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 Lister's tubercle.