science

Superficial palmar arch

Superficial palmar arch is a science 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 Superficial palmar arch rather than just read about it. In short: The superficial palmar arch is formed predominantly by the ulnar artery, with a contribution from the superficial palmar branch of the radial artery. However, in some individuals the contribution from the radial artery might be absent, and instead anastomoses with either the princeps pollicis artery, the radialis indicis artery, or the median artery, the former two of which are branches from the radial artery.

Key takeaways

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

Reference excerpt

The superficial palmar arch is formed predominantly by the ulnar artery, with a contribution from the superficial palmar branch of the radial artery. However, in some individuals the contribution from the radial artery might be absent, and instead anastomoses with either the princeps pollicis artery, the radialis indicis artery, or the median artery, the former two of which are branches from the radial artery. Alternative names for this arterial arch are: superficial volar arch, superficial ulnar arch, arcus palmaris superficialis, or arcus volaris superficialis. The arch passes across the palm in a curve (Boeckel's line) with its convexity downward, With the thumb fully extended, the superficial palmar arch would lie approximately 1 cm from a line drawn between the first web space to the hook of hamate (Kaplan's cardinal line). The superficial palmar arch extends more distally than the deep palmar arch. The connection between the deep and superficial palmar arterial arches is an example of anastomosis, and can be tested for using Allen's test. Three common palmar digital arteries arise from the arch, proceeding down on the second, third, and fourth lumbrical muscles, respectively. They each receive a contribution from a palmar metacarpal artery. Near the level of the metacarpophalangeal joints, each common palmar digital artery divides into two proper palmar digital arteries. Four digital branches arise from this palmar arch that supplies the medial/ulnar 3 1/2 fingers.

See also Deep palmar arch Palmar carpal arch Dorsal carpal arch

Additional images

Footnotes and references

References This article incorporates text in the public domain from page 598 of the 20th edition of Gray's Anatomy (1918)

External links lesson5artofhand at The Anatomy Lesson by Wesley Norman (Georgetown University) Atlas image: hand_blood1 at the University of Michigan Health System - "Palm of the hand, superficial dissection, anterior view"

Illustrations

Worked examples

Example 1 — a first encounter with Superficial palmar arch

Start with the simplest possible case. Write down what Superficial palmar arch claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Superficial palmar arch 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 Superficial palmar arch 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 Superficial palmar arch

In research: Superficial palmar arch appears in science 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 Superficial palmar arch 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: Superficial palmar arch is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arteries of the upper limb, Cardiovascular system stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Superficial palmar arch 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 “Superficial palmar arch” →

Affiliate

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

How to study Superficial palmar arch in 20 minutes

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

Frequently asked questions

What is Superficial palmar arch in simple terms?

Why does Superficial palmar arch matter?

Because it connects several science 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 Superficial palmar arch?

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 Superficial palmar arch.