ArticleslgStudy

biology

Prefrontal bone

Prefrontal bone 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 Prefrontal bone rather than just read about it. In short: The prefrontal bone is a bone separating the lacrimal and frontal bones in many tetrapod skulls. It first evolved in the sarcopterygian clade Rhipidistia, which includes lungfish and the Tetrapodomorpha.

Prefrontal bone — main illustration
Prefrontal bone — illustration

Key takeaways

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

Reference excerpt

The prefrontal bone is a bone separating the lacrimal and frontal bones in many tetrapod skulls. It first evolved in the sarcopterygian clade Rhipidistia, which includes lungfish and the Tetrapodomorpha. The prefrontal is found in most modern and extinct lungfish, amphibians and reptiles. The prefrontal is lost in early mammaliaforms and so is not present in modern mammals either.

In dinosaurs The prefrontal bone is a very small bone near the top of the skull, which is lost in many groups of coelurosaurian theropod dinosaurs and is completely absent in their modern descendants, the birds. Conversely, a well developed prefrontal is considered to be a primitive feature in dinosaurs. The prefrontal makes contact with several other bones in the skull. The anterior part of the bone articulates with the nasal bone and the lacrimal bone. The posterior part of the bone articulates with the frontal bone and more rarely the palpebral bone. The prefrontal bone sometimes forms part of the upper margin of the orbit. This bone is part of the skull roof, which is a set of bones that cover the brain, eyes and nostrils.

References

Illustrations

Prefrontal bone: Dromaeosaurus skull.
Dromaeosaurus skull.

Worked examples

Example 1 — a first encounter with Prefrontal bone

Start with the simplest possible case. Write down what Prefrontal bone 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 Prefrontal bone 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 Prefrontal bone 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 Prefrontal bone

In research
Prefrontal bone 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 Prefrontal bone 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
Prefrontal bone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Musculoskeletal system stubs, Skull bones, Vertebrate anatomy stubs, so understanding it makes those chapters shorter.
In everyday life
Look for Prefrontal bone 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.

Affiliate

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

How to study Prefrontal bone in 20 minutes

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

Frequently asked questions

What is Prefrontal bone in simple terms?

The prefrontal bone is a bone separating the lacrimal and frontal bones in many tetrapod skulls. It first evolved in the sarcopterygian clade Rhipidistia, which includes lungfish and the Tetrapodomorpha.

Why does Prefrontal bone 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 Prefrontal bone?

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 Prefrontal bone.

Tags

  • Musculoskeletal system stubs
  • Skull bones
  • Vertebrate anatomy stubs

Keep exploring