science

Submental space

Submental space 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 Submental space rather than just read about it. In short: The submental space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space located between the mylohyoid muscle superiorly, the platysma muscle inferiorly, under the chin in the midline.

Key takeaways

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

Reference excerpt

The submental space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space located between the mylohyoid muscle superiorly, the platysma muscle inferiorly, under the chin in the midline. The space coincides with the anatomic region termed the submental triangle, part of the anterior triangle of the neck.

Location and structure

Anatomic boundaries The boundaries of the submental space are:

the mylohyoid muscle superiorly the investing layer of deep cervical fascia (and this in turn is covered by the platysma muscle) inferiorly the inferior border of the mandible anteriorly the hyoid bone posteriorly the anterior bellies of the digastric muscles laterally.

Communications The communications of the submental space are:

the submandibular spaces posterolaterally. the sublingual space superiorly (via erosion through the mylohyoid).

Contents Its contents are submental lymph nodes, areolar connective tissue and the anterior jugular veins.

Clinical relevance This space may be created by pathology, such as the spread of pus in an infection. Odontogenic infection of the mandibular anterior teeth may erode through the lingual cortical plate of the mandible. If the level at which the infection breaks out of the mandible is below the attachment of the mylohyoid, then it will spread into the submental space. However, it is more usual for odontogenic infections to spread into the submental space via first involving the submandibular space. Cutaneous infections or symphyseal/parasymphyseal mandibular fractures may also give rise to a submental space infection. Signs and symptoms of a severe submental abscess include a firm swelling below the chin and dysphagia (difficulty swallowing). Treatment is by surgical incision and drainage, with the incision running transversely in a skin crease behind the chin. Ludwig's angina is a progressive cellulitis involving the submandibular, sublingual and submental spaces bilaterally. Ludwig's angina may extend into the pharyngeal and cervical spaces, and the swelling can compress the airway and cause dyspnoea (difficulty breathing).

References

Illustrations

Worked examples

Example 1 — a first encounter with Submental space

Start with the simplest possible case. Write down what Submental space 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 Submental space 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 Submental space 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 Submental space

In research: Submental space 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 Submental space 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: Submental space is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fascial spaces of the head and neck, Mouth, Oral and maxillofacial surgery, so understanding it makes those chapters shorter.
In everyday life: Look for Submental space 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 Submental space in 20 minutes

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

Frequently asked questions

What is Submental space in simple terms?

Why does Submental space 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 Submental space?

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 Submental space.