MUSCLES OF THE BACK Flashcards
Origin of the trapezius
Superior nuchal line, external occipital protuberance, Nuchal ligament and C7 to T12
Insertion of trapezius
Lateral one third of clavicle, acromion and spine of scapula
Action of upper fibres of trapezius
Elevate the scapula
Action of middle fibres of trapezius
Adduct the scapula
Action of lower fibres of scapula
Depress the scapula
Innervation of trapezius
Accessory nerve
Origin of latissimus dorsi
Spinous process of T7 to T12, outer lip of iliac crest, ribs 8 to 12 and inferior angle of scapula
Insertion of latissimus dorsi
Floor of intertubercular sulcus of humerus
Action of latissimus dorsi
Adduction, medially rotates the arm, extends
Innervation of latissimus dorsi
Thoracodorsal nerve
Origin of levator scapula
Transverse process of C1 to C4
Insertion of levator scapula
Superior angle of scapula and upper part of medial border of scapula
Action of levator scapula
Elevates the scapula
Innervation of levator scapula
Dorsal scapular nerve
Origin of rhomboid minor
Ligamentum nuchae and spinous process of C7 to T1
Insertion of rhomboid minor
Medial border of scapula
Origin of rhomboid major
Spinous process of T2 to T5
Insertion of rhomboid major
Medial border of scapula below rhomboid manior
Action of rhomboids
Retracts the scapula
Innervation of rhomboids
Dorsal scapula nerve
Origin of serratus post superior
Nuchal ligament, spinous process of C7 to T3
Insertion of serratus post. superior
Upper borders of ribs 2-5
Origin of serratus post. inferior
Spinous process of T11 to L2
Insertion of serratus post. inferior
Ribs 9-12
Action of serratus post. superior
Deep insipration
Action of serratus post. inferior
Deep expiration
