This is an in-depth, detailed summary of the anatomy of the musculoskeletal system. It includes muscle origins, insertions, actions, nerve and blood supply etc. It contains all the work covered in ANA 152. This summary is color-coded and has great diagrams. It was compiled using lecture slides and ...
MUSCLES
INTRODUCTION:
• 3 Types:
• Voluntary- Conscious doing (lift arm)
• Involuntary- Not conscious (blinking)
• Cardiac- Specialized muscle (heartbeat)
• Muscle attachments:
• Attach to bone
• Fibres connect via connective tissue
• Bone - tendon
• Muscle - aponeurosis
• Nomenclature: Commented [ll1]: NBNB
Is there a bone named after muscle? X = location Y = bone(s) attached to
1. Shape - delta ( ) / trapezius (Table)
2. Fibre direction - oblique (internal oblique) / erect (rectus abdominis)
3. Location - brachialis (brachium) / supraspinatus (supraspinatus fossa)
4. Movement - pronator teres / flexor carpi radialis
5. Number of attachments - triceps / biceps
6. Bone(s) attached to - coracobrachialis (coracoid process and arm) /
sternocleidomastoid (sternum/clavicle/mastoid process)
• How muscles work:
• Muscles pull not push!!!
• Origin - proximal - where attaches - no landmarks - powerhouse/anchor/strength
• Insertion - distal - action will be - landmarks
• Act FROM INSERTION onto origin - CANNOT be on same bone (no
action/pull/movement)
, • Most muscles of brachium originate from the scapula
• Most muscles of scapula originate on the thorax
THE UPPER LIMB: Commented [ll2]: Identify all+action+innervation
Can ask to describe= everything
List
Follow up questions
LQ
• Origin:
• 4 slips on C1-C4 transverse processes
• Insertion:
• Med. border of scapula
• Action:
• Shoulder elevation
• Innervation:
• Branches of C3-C5
• Dorsal scapular/cervical
RHOMBOID MINOR/MAJOR
• Origin:
• T1-T4 spinous processes
• Lower end of nuchal lig.
• Insertion:
• Med. border of scapula
• Inf. to scapula spine
• Action:
• Holds scapula against thoracic wall
• Retraction of scapula
• Innervation:
• Dorsal scapular (C5)
, SERRATUS ANTERIOR
• Origin:
• Finger like processes from ribs 1-8
• Insertion:
• Med. side of scapula costal surface
• Action:
• Holds scapula against thoracic wall
• Protraction of scapula
• Scapula rotation during abduction
• Innervation:
• Long Thoracic nerve (C5-C7)
SUBCLAVIUS
• Origin:
• First rib/cartilage
• Insertion:
• Inf. surface of clavicle middle 1/3
• Action:
• Anchors/depresses clavicle
• Innervation:
• Nerve to subclavius (C5)
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 or Stuvia-credit 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 levonlubbe. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.68. You're not tied to anything after your purchase.
