science

Surgical neck of the humerus

Surgical neck of the humerus 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 Surgical neck of the humerus rather than just read about it. In short: The surgical neck of the humerus is a bony constriction at the proximal end of shaft of humerus. It is situated distal to the greater tubercle and lesser tubercle, and proximal to the deltoid tuberosity.

Key takeaways

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

Reference excerpt

The surgical neck of the humerus is a bony constriction at the proximal end of shaft of humerus. It is situated distal to the greater tubercle and lesser tubercle, and proximal to the deltoid tuberosity.

Clinical significance The surgical neck is much more frequently fractured than the anatomical neck of the humerus. This type of fracture takes place when the humerus is forced in one direction while the joint capsule and the rotator cuff muscles remain intact. A fracture in this area is most likely to cause damage to the axillary nerve and posterior circumflex humeral artery. Damage to the axillary nerve affects function of the teres minor and deltoid muscles, resulting in loss of abduction of arm (from 15-90 degrees), weak flexion, extension, and rotation of shoulder as well as loss of sensation of the skin over a small part of the lateral shoulder.

Additional images

See also Quadrangular space Anatomical neck of the humerus

References This article incorporates text in the public domain from page 209 of the 20th edition of Gray's Anatomy (1918)

External links Anatomy image: skel/humerusup2 at Human Anatomy Lecture (Biology 129), Pennsylvania State University "Surgical neck of humerus". Medcyclopaedia. GE.{{cite web}}: CS1 maint: deprecated archival service (link) radiographsul at The Anatomy Lesson by Wesley Norman (Georgetown University) (xrayleftshoulder)

Illustrations

Worked examples

Example 1 — a first encounter with Surgical neck of the humerus

Start with the simplest possible case. Write down what Surgical neck of the humerus 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 Surgical neck of the humerus 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 Surgical neck of the humerus 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 Surgical neck of the humerus

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

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

Frequently asked questions

What is Surgical neck of the humerus in simple terms?

Why does Surgical neck of the humerus 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 Surgical neck of the humerus?

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 Surgical neck of the humerus.