science

Rectus capitis posterior major muscle

Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle rather than just read about it. In short: The rectus capitis posterior major (or rectus capitis posticus major) is a muscle in the upper back part of the neck. It is one of the suboccipital muscles.

Key takeaways

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

Reference excerpt

The rectus capitis posterior major (or rectus capitis posticus major) is a muscle in the upper back part of the neck. It is one of the suboccipital muscles. Its inferior attachment is at the spinous process of the axis (Second cervical vertebra); its superior attachment is onto the outer surface of the occipital bone on and around the side part of the inferior nuchal line. The muscle is innervated by the suboccipital nerve (the posterior ramus of cervical spinal nerve C1). The muscle acts to extend the head and rotate the head to its side.

Anatomy The rectus capitis posterior major muscle is one of the suboccipital muscles. It forms the superomedial boundary of the suboccipital triangle. The muscle extends obliquely superiolaterally from its inferior attachment to its superior attachment. It becomes broader superiorly.

Attachments The muscle originates inferiorly by a pointed tendon from (the external aspect of) the (bifid) spinous process of the axis (cervical vertebra C2). It is inserted superiorly into (the lateral portion of) the inferior nuchal line and the surface of the occipital bone just inferior to this line.

Innervation The muscle receives motor innervation from the suboccipital nerve (the posterior ramus of cervical spinal nerve C1).

Relations Superiorly, as the two muscles diverge laterally, they create between them a triangular space in which parts of the two recti capitis posteriores minores muscles are exposed.

Actions/movements The muscle extends the head and (acting together with the obliquus capitis inferior muscle) ipsilaterally rotates the head.

Function Its main actions are to extend and rotate the atlanto-occipital joint.

Research A soft tissue connection bridging from the rectus capitis posterior major to the cervical dura mater was described in 2011. Various clinical manifestations may be linked to this anatomical relationship. It has also been postulated that this connection serves as a monitor of dural tension along with the rectus capitis posterior minor and the obliquus capitis inferior.

See also Atlanto-occipital joint Rectus capitis lateralis Rectus capitis posterior minor muscle Rectus capitis anterior muscle Suboccipital muscles

Additional images

References This article incorporates text in the public domain from page 401 of the 20th edition of Gray's Anatomy (1918)

External links

PTCentral Anatomy photo:01:10-0102 at the SUNY Downstate Medical Center Anatomy figure: 01:07-04 at Human Anatomy Online, SUNY Downstate Medical Center

Illustrations

Worked examples

Example 1 — a first encounter with Rectus capitis posterior major muscle

Start with the simplest possible case. Write down what Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle

In research: Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle 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: Rectus capitis posterior major muscle is common in secondary-school and first-year university syllabi. It links to neighbouring topics Muscle stubs, Muscles of the head and neck, so understanding it makes those chapters shorter.
In everyday life: Look for Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rectus capitis posterior major muscle 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.
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Frequently asked questions

What is Rectus capitis posterior major muscle in simple terms?

The rectus capitis posterior major (or rectus capitis posticus major) is a muscle in the upper back part of the neck. It is one of the suboccipital muscles.

Why does Rectus capitis posterior major muscle 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 Rectus capitis posterior major muscle?

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 Rectus capitis posterior major muscle.