Superficial and Back (Lecture 1) Flashcards
What are the proximal attachments of the Trapezius
external occipital protuberance
of skull, nuchal ligament, spinous
processes of C7-T12 vertebrae
What are the distal attachments of the Trapezius
-lateral third of clavicle (anterior),
acromion, and spine of scapula
What actions does the Trapezius perform
-elevates, depresses, and retracts
scapula, rotates glenoid fossa
superiorly
Where does the blood supply for the Trapezius come from?
-transverse cervical artery
What innervates the Trapezius?
- motor: accessory nerve (CNXI)
- pain & proprioception: C3 & C4
What are the proximal attachments for the Latissimus Dorsi?
-spinous processes of inferior 6
thoracic vertebrae, thoracolumbar fascia,
iliac crest, and inferior 3 ribs
What are the distal attachments for the Latissimus Dorsi?
- floor of intertubercular sulcus (bicipital
groove) of humerus
What are the actions of the Latissimus Dorsi?
-extends, adducts, and medially rotates
humerus; raises torso towards arms
during climbing
What is the blood supply for the Latissimus Dorsi?
- thoracodorsal artery
What is the innervation for the Latissimus Dorsi?
- thoracodorsal nerve (C6, C7, C8)
What is the proximal attachment for the Levator scapulae?
-posterior tubercles of
transverse processes of first 4 cervical
vertebrae
What is the distal attachment for the Levator scapulae?
-medial border of scapula, superior
part of scapular spine
What are the actions of the Levator scapulae
-elevates scapula and tilts glenoid fossa
inferiorly by rotating scapula (downward
rotation)
What is the blood supply for the Levator scapulae?
- dorsal scapular artery
What is the innervation for the Levator scapulae?
-dorsal scapular nerve (C5) and
cervical spinal nerves (C3, C4)
