Superficial Muscles Flashcards
Trapezius
Origin
EOP
Medial 1/3 of superior nuchal line
Nuchal ligament
SP C7-T12
Trapezius
Insertion
Lateral 1/3 of clavicle
Spine of scapula
Acromion process
Trapezius
Innervation
Spinal accessory nerve, CN XI (motor)
ventral rami C3-C4 (proprioception)
Trapezius
Action
Upper Part: elevate scapula
Middle Part: retract scapula
Lower Part: depress scapula
Latissimus Dorsi
Origin
Thoracolumbar fascia SP T6-L5 Sacrum Iliac crest Ribs 8-12 Inferior angle of scapula
Latissimus Dorsi
Insertion
Floor of intertubercular groove of humerus
Latissimus Dorsi
Innveration
Thoracodorsal nerve C6-C8
Latissimus Dorsi
Action
Humerus: ADDuction
Extension
Medial rotation
Levator Scapulae
Origin
Posterior Tubercles of transverse processes of C1-C4
Levator Scapulae
Insertion
Superior angle of scapula
Levator Scapulae
Innervation
Dorsal scapular nerve (C5)
Ventral rami C3-C4
Levator Scapulae
Action
Scapula: elevation
Downward rotation
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 nerve (C5)
Rhomboid Minor
Action
Scapula: Retraction
Downward rotation
Scapular Stabilization
Rhomboid Major
Origin
SP T2-T5
Rhomboid Major
Insertion
Medial border of scapula INFERIOR to the scapular spine
Rhomboid Major
Innervation
Dorsal scapular nerve (C5)
Rhomboid Major
Action
Scapula: Retraction
Downward Rotation
Scapular stabilization
Serratus Posterior Superior
Origin
Ligamentum nuchae
SP C7-T3
Serratus Posterior Superior
Insertion
Superior borders of ribs 2-5
Serratus Posterior Superior
Innervation
Ventral rami T2-T5
Serratus Posterior Superior
Action
Ribs: Elevation of 2nd-5th ribs (helps with deep inspiration)
Serratus Posterior Inferior
Origin
SP T11-L2
Serratus Posterior Inferior
Insertion
Inferior borders of ribs 9-12
Serratus Posterior Inferior
Innervation
Ventral rami T9-T12
Serratus Posterior Inferior
Action
Ribs: Depression of 9th-12th ribs (helps with forced expiration)
