Upper Body Origin & Insertions Flashcards
Levator Scapula Insertion
Superior angle of scapula and some of the medial border of the scapula, just proximal to the rhomboids insertion
Levator Scapula Origin
Transverse processes (TPs) of C1 to C4
Levator Scapula Pathway Points
- The proximal end of LS can be found in a window between SCM and the upper trapezius, on the lateral side of the neck
- The distal end of LS travels deep to upper trapezius
Upper Trapezius Origin
Superior nuchal line on the posterior surface of the occipital bone, plus the nuchal ligament that connects the SPs of the cervical vertebrae
Upper Trapezius Insertion
Upper surface of the lateral third of the clavicle, all the way to the AC joint
Upper Trapezius Pathway Points
Belly travel inferiorly, laterally and anteriorly on its way to the clavicle
Sternocleidomastoid Origin
Manubrium of the sternum (superficial fibers) and the medial third of the clavicle (deep fibers)
Sternocleidomastoid Insertion
Mastoid process of the temporal bone, and along the superior nuchal line of the occipital bone
Sternocleidomastoid Pathway Points
- the sternal head origin is rounded, the clavicular head is wider and flatter
- SCM forms the upper border of the posterior triangle of the neck
Splenius Capitis and Cervicis Origin
SPs of C3 to T6 and the nuchal ligament
Splenius Capitis and Cervicis Insertion
TPs of C1 to C3, plus the mastoid process of the temporal bone and the superior nuchal line with SCM
Splenius Capitis and Cervicis Pathway Points
- Fibers travel diagonally up and laterally, deep to upper trapezius
- Travels through the posterior triangle of the neck, proximal to levator scapula
Scalenes Origin
Three muscles (anterior, middle, and posterior) from the TPs and the TP tubercles of C2 to C7
Scalenes Insertion
The upper surfaces of ribs 1 and 2, posterior to the clavicle
Scalenes Pathway Points
These muscles travel across the lateral side of the neck, in the posterior triangle just anterior to levator scapula
The brachial plexus (nerve supply to the arm) travels between the anterior and middle scalenes
Middle Trapezius Origin
SPs of C7/T1 to T4
Middle Trapezius Insertion
Upper border of acromion process + upper border of the lateral half of spine of scapula (SOS)
Middle Trapezius Pathway Points
Fibres travel horizontally towards their insertion, superficial to the rhomboids
Lower Trapezius Origin
SPs of T5 to T12
Lower Trapezius Insertion
upper border of the medial half of the spine of scapula, to the root of spine (ROSS)
Lower Trapezius Pathway Points
- Inferior fibres travel obliquely – superiorly and laterally
- superior fibres travel horizontally, like middle trapezius
Serratus Anterior Origin
individual finger-like origins from the lateral sides of ribs 1 to 9
Serratus Anterior Insertion
full length of the medial border of the scapula, along the anterior (costal) surface
Serratus Anterior Pathway Points
- Upper fibres travel horizontally while the lowest fibres travel obliquely as they wrap the ribcage – superiorly and posteriorly
- Travels deep to the scapula (sandwiched between scapula and ribcage)
Pectoralis Minor Origin
anterior surfaces of ribs 3, 4, 5, just lateral to their costal cartilages