Back, Shoulder, Scapula Flashcards
Trapezius
Origin
EOP, Medial 1/3 Superior Nuchal Line, Nuchal L., SP C7-T12
Trapezius
Insertion
Lateral 1/3 Clavicle, Spine of Scapula, Acromion Process
Trapezius
Innervation
Spinal Accessory N. (CN XI) (MOTOR)
Ventral Rami C3-C4 (SENSORY)
Trapezius
Action
Upper: Scapular Elevation
Middle: Scapular Retraction
Lower: Scapular Depression
Closed Chain: Ipsilateral lateral flexion, head and neck extension
Latissimus Dorsi
Origin
Thoracolumbar Fascia, SP T7-L5, Sacrum, Iliac Crest, and Ribs 9-12
Latissimus Dorsi
Insertion
Floor of Intertubercular Groove of Humerus
Latissimus Dorsi
Innervation
Thoracodorsal N. (C6-C8)
Latissimus Dorsi
Action
Humerus: adduction, extension, medial rotation
Levator Scapulae
Origin
Posterior Tubercles TP C1-C4
Levator Scapulae
Insertion
Superior angle of scapula
Levator Scapulae
Innervation
Dorsal Scapular N. (C5)
Ventral Rami C3-C4
Levator Scapulae
Action
Scapula: elevation, downward rotation
Closed Chain: Ipsilateral lateral flexion of neck
Rhomboid Minor
Origin
SP C7-T1
Rhomboid Minor
Insertion
Medial border of the scapula at the level of the scapular spine
Rhomboid Minor
Innervation
Dorsal Scapular N. (C5)
Rhomboid Minor
Action
Scapula: Retraction, downward rotation, helps fix scapula to thoracic wall
Rhomboid Major
Origin
SP T2-T5
Rhomboid Major
Insertion
Medial border of the scapula inferior to the scapular spine
Rhomboid Major
Innervation
Dorsal Scapular N. (C5)