Summary
Summary The anatomy of the neck & back
- Module
- Institution
All muscles of the back including superficial, intermediate and deep; All layers of the neck muscles; blood supply and nerve innervation of the back and neck.
[Show more]
Seller
Follow
debbiedeponte
Content preview
BACK MUSCLESORIGIN → site of tendinous attachment that is stationary during contraction
Where muscle starts
INSERTION → site of tendinous attachment that moves during contraction
Where muscle ends
BELLY → portion of muscle between origin & insertion
Muscles only pull, they don’t push
Muscles of back and neck are complex detailed arrangement
General pattern simple
3 layers:
Superficial
Intermediate
Deep
SUPERFICIAL MUSCLES
Involved in movements of shoulder
2 layers
Trapezius & latissimus dorsi → 1st layer
Rhomboid minor & major and levator scapulae → 2nd layer
,TRAPEZIUS
Origin
o Superior nuchal line on skull
o Ligamentum nuchae
o Spines of vertebrae C7 - T12
Insertion
o Lateral 1/3 clavicle
o Acromion process
o Superior border scapula spine
Action
o Lifts shoulders up and down (elevation & depression)
o Retraction (pulling scapula together)
o Lateral rotation of glenohumeral joint
, LATISSIMUS DORSI
Origin
o Spines of vertebrae T7-L5
o Lumbar vertebrae
o Sacral & iliac crests
o Inferior 4 ribs (via thoracolumbar fascia)
Insertion
o Intertubercular sulcus of humerus
Action
o Extension, adduction & medial rotation of arm at shoulder
o Draws arms inferiorly & posteriorly
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller debbiedeponte. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £8.08. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now