Back Muscle Attachments
What is the medial attachment of the trapezius?
external occipital protuberance
SP C7-T12
ligamentum nuchae
nuchal line
What is the term for the formation of the three germ layers that will form the primordia of the tissues and organs?
Gastrulation
What is the action of the rhomboid major?
retract and rotate the scapula
Which nerve innervates the trapezius?
Spinal accessory nerve (Cranial XI)
What four branches does the thoracoaromial artery branch into?
Acromial
Deltoid
Pectoral
Clavicular
What is the lateral attachment of the latissimus dorsi?
floor of the intertubercular sulcus of the humerus
What is made from the piling of ectodermal cells towards the primitive streak?
neural tube
What is the action of the serratus posterior inferior?
depresses ribs 9-12
Which nerve innervates the levator scapulae?
dorsal scapular nerve
If I were a drop of arterial blood, what path would I take to get to the right anterior intercostal artery?
(Start in the Heart)
Heart - Aorta - aortic arch - brachicephalic - right subclavian - right internal thoracic - musculophrenic - anterior intercostal
What is the medial attachment of the levator scapulae?
TP C1-C4
At what level does the caudal tip lie at birth?
L3
What is the action of the splenius?
laterally flexes and rotates head or neck to the same side as the face
extends head and neck
Which nerve innervates the rectus capitis posterior major?
suboccipital nerve
If I were a drop of venous blood, what path would I take if I were to start in the left posterior intercostal vein?
left posterior intercostal vein - hemiazygous vein - azygous vein - superior vena cava
What is the superior attachment of the obliquus capitis superior?
laterally between nuchal lines
What three chunks does the mesoderm split into?
lateral mesoderm, intermediate mesoderm, paraxial mesoderm
What is the action of the pectoralis major?
medially rotates, flexes, and adducts the arm
Which nerve innervates the pectoralis major?
lateral and medial pectoral nerve
If I were a drop of arterial blood, what pathway would I take to get to the posterior intercostal artery?
Heart - aorta - aortic arch - subclavian artery - costocervical - superior intercostal - posterior intercostal
What is the superior attachment for the multifidus?
SP L5-C2
Why does spina bifida occur?
Spina bifida occurs when the neural tube fails to close properly
What is the action of the obliquus capitis inferior?
rotates face to same side
Which nerve innervates the Spinalis?
posterior rami of lower cervical
If I were a drop of venous blood what pathway would I take to get back to the heart if I started in the right posterior intercostal vein above rib 3?
posterior intercostal vein - superior intercostal vein - right subclavian vein - right brachiocephalic vein - superior vena cava