origin: supraspinous ligament in the cervical
region and spinous processes of the first
insertion: vertebral border of scapula
nerve: ventral rami of cervical nerves near its
action: draws cranially, retracts (adducts)
and rotates scapula
origin: spinous processes of C7 and T1 and lower
part of ligamentum nuchae
insertion: vertebral (medial) border of scapula at
the root of the spine of the scapula
nerve: dorsal scapular (C5)
action: retracts (adducts), elevates and inferior
rotation of scapula
This is one of the five muscles that are grouped as muscles of the scapula, or sometimes as muscles that moor the scapula. The above drawings of the origin and insertion might help visualize this information (red is the origin and blue is the insertion). Note that the origin drawing is for both the rhomboideus major and rhomboideus minor. Thanks to Laura Holder for the excellent drawing of the origin!
2009 by William C. Johnson II
ALL RIGHTS RESERVED!