science

Pterygoid plexus

Pterygoid plexus 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 Pterygoid plexus rather than just read about it. In short: The pterygoid plexus (; from Greek pteryx, "wing" and eidos, "shape") is a fine venous plexus upon and within the lateral pterygoid muscle. It drains by a short maxillary vein.

Key takeaways

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

Reference excerpt

The pterygoid plexus (; from Greek pteryx, "wing" and eidos, "shape") is a fine venous plexus upon and within the lateral pterygoid muscle. It drains by a short maxillary vein.

Anatomy It is a venous plexus of considerable size, situated between the temporalis muscle and lateral pterygoid muscle, and partly between the two pterygoid muscles. The plexus features venous valves. The contractions of the lateral pterygoid muscle promote venous drainage.

Tributaries The plexus drains all veins that correspond to the branches of the maxillary artery (however, much of the blood delivered by the maxillary artery is returned by other routes), as well as two additional veins. It receives the following veins:

sphenopalatine middle meningeal deep temporal (anterior & posterior) pterygoid masseteric buccinator alveolar some palatine veins (palatine vein which divides into the greater and lesser palatine v.) inferior ophthalmic vein deep facial vein infraorbital vein

Anastomoses The plexus is connected with the intercranial cavernous sinus by emissary veins passing through the foramen ovale and foramen lacerum.

Relations This plexus communicates freely with the anterior facial vein; it also communicates with the cavernous sinus, by branches through the foramen Vesalii, foramen ovale, and foramen lacerum. Due to its communication with the cavernous sinus, infection of the superficial face may spread to the cavernous sinus, causing cavernous sinus thrombosis. Complications may include edema of the eyelids, conjunctivae of the eyes, and subsequent paralysis of cranial nerves which course through the cavernous sinus. The pterygoid plexus of veins becomes the maxillary vein. The maxillary vein and the superficial temporal vein later join to become the retromandibular vein. The posterior branch of the retromandibular vein and posterior auricular vein then form the external jugular vein, which empties into the subclavian vein.

References This article incorporates text in the public domain from page 645 of the 20th edition of Gray's Anatomy (1918)

External links Anatomy photo:27:13-0100 at the SUNY Downstate Medical Center - "Infratemporal Fossa: The Pterygoid Plexus of Veins" Pterygoid Plexus

Illustrations

Worked examples

Example 1 — a first encounter with Pterygoid plexus

Start with the simplest possible case. Write down what Pterygoid plexus 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 Pterygoid plexus 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 Pterygoid plexus 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 Pterygoid plexus

In research: Pterygoid plexus 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 Pterygoid plexus 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: Pterygoid plexus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cardiovascular system stubs, Veins of the head and neck, so understanding it makes those chapters shorter.
In everyday life: Look for Pterygoid plexus 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 Pterygoid plexus in 20 minutes

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

Frequently asked questions

What is Pterygoid plexus in simple terms?

The pterygoid plexus (; from Greek pteryx, "wing" and eidos, "shape") is a fine venous plexus upon and within the lateral pterygoid muscle. It drains by a short maxillary vein.

Why does Pterygoid plexus 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 Pterygoid plexus?

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 Pterygoid plexus.