science

Lumbricals of the foot

Lumbricals of the foot 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 Lumbricals of the foot rather than just read about it. In short: The lumbricals are four small skeletal muscles, accessory to the tendons of the flexor digitorum longus muscle. They are numbered from the medial side of the foot.

Key takeaways

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

Reference excerpt

The lumbricals are four small skeletal muscles, accessory to the tendons of the flexor digitorum longus muscle. They are numbered from the medial side of the foot.

Structure The lumbricals arise from the tendons of the flexor digitorum longus muscle, as far back as their angles of division, each springing from two tendons, except the first. The first lumbrical is unipennate, while the second, third and fourth are bipennate. The muscles end in tendons, which pass forward on the medial sides of the four lesser toes, and are inserted into the expansions of the tendons of the extensor digitorum longus muscle on the dorsal surfaces of the proximal phalanges. All four lumbricals insert into extensor hoods of the phalanges, thus creating extension at the inter-phalangeal (PIP and DIP) joints. However, as the tendons also pass inferior to the metatarsal phalangeal (MTP) joints it creates flexion at this joint.

Innervation The most medial lumbrical is innervated by the medial plantar nerve while the remaining three lumbricals are supplied by the lateral plantar nerve.

Variation Absence of one or more; doubling of the third or fourth even the fifth. Insertion partly or wholly into the first phalanges.

History The term "lumbrical" comes from the Latin, meaning "worm".

Additional images

References This article incorporates text in the public domain from page 493 of the 20th edition of Gray's Anatomy (1918)

External links PTCentral

Illustrations

Worked examples

Example 1 — a first encounter with Lumbricals of the foot

Start with the simplest possible case. Write down what Lumbricals of the foot 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 Lumbricals of the foot 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 Lumbricals of the foot 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 Lumbricals of the foot

In research: Lumbricals of the foot 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 Lumbricals of the foot 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: Lumbricals of the foot is common in secondary-school and first-year university syllabi. It links to neighbouring topics Foot muscles, Muscle stubs, Muscles of the lower limb, so understanding it makes those chapters shorter.
In everyday life: Look for Lumbricals of the foot 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 Lumbricals of the foot in 20 minutes

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

Frequently asked questions

What is Lumbricals of the foot in simple terms?

The lumbricals are four small skeletal muscles, accessory to the tendons of the flexor digitorum longus muscle. They are numbered from the medial side of the foot.

Why does Lumbricals of the foot 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 Lumbricals of the foot?

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 Lumbricals of the foot.