Shoulder
This originates in the upper 8 ribs
Serrated Anterior
Muscles of the spinotransveralis group and their action(s).
Splenius group; pulls head posteriorly (bilateral) and turns head ipsilaterally (unilateral)
Nerve of this region
Suboccipital nerve
Nerve that innervates the trapezius
Spinal accessory nerve (cranial nerve 11)
This nerve innervates the both the Teres Minor and the Deltoid muscles
Axillary nerve
Insertion: spinous process of upper thoracic vertebrae (4-8)
Spinalis
Transverse process of atlas (C1)
origin of the obliquues capitis superior
insertion of the obliquues capitis inferior
Dorsal primary ramus of the 1st cervical nerve; runs within the Suboccipital triangle
Abduction (Deltoid muscle)
Origin is the greater tubercle
supraspinatus, infraspinatus, Teres minor
What are the OIANs of the transversospinalis group?
O: transverse process
I: spinous process at a higher level
A: extend vertebral column (bilateral) and contralateral rotation (unilateral)
Boundaries
Inferior: obliquues capitis inferior
Lateral: obliquues capitols superior
Medial: rectus capitis posterior major
Runs within the Suboccipital triangle through the transverse foramen of the cervical vertebrae
Vertebral artery
Teres Major origin and insertion
O: dorsal surface of scapula by the inferior angle
I: medial lip of the interterbecular groove
Splenius capitals origin
Ligamentum nauche, spinous proves of cervical vertebrae 7 to thoracic vertebra 3
Origin of Rectus capitiits posterior minor
Posterior tubercle of atlas
Triangular space
Space bounded by the Teres major, Teres minor, and long head of the triceps; transmits the circumflex scapular artery — a branch of the subscapular artery
Origin of serratus anterior
The anterior surface of the medial border of the scapula
Nerve Innervation: dorsal rami of some spinal nerves
Iliocostialis, longissimus, spinalis
All 4 muscles have the same action, however 1 of the muscles has one last action than the other 4. What is that muscle and its one origin.
Obliquues capitis inferior; turn head to same side (ipsilateral)
Suprascapular artery
Arises from the thyrocervical trunk (from subclavian) and passes Laterally just superoposterior to the clavicle. It joins that super scapular nerve and vein near the scapular notch and passes superficial to the superior transverse scapular ligament. It supplies the supraspinous fossa, infraspinous fossa, and the anastomose with the circumflex scapular artery.