1what is the function of the superficial extrinsic back muscles
move upper limb
2list the superficial extrinsic back muscles
trapezius, latissimus dorsi, levator scapulae, rhomboid major, rhomboid minor
3what is the function of the deep extrinsic back muscles
accessory muscles of respiration
4list the deep extrinsic back muscles
serratus posterior superior, serratus posterior inferior
5what is the origin of the trapezius
midline: occipital bone, nuchal lig, cervical and thoracic spinous processes
6what is the insertion of the trapezius
upper limb: scapular spine, acromion process, 1/3 of clavicle
7what are the actions of the trapezius
varies by fibers, elevate and depress scapula, retract scapula, superiorly rotate scapula, extend/laterally flex neck
8what is cranial nerve 11
accessory nerve
9what is the innervation of the trapezius
Accesory Nerve
10what artery foes the accessory nerve run with
the trasverse cervical artery
11what would happen if the accesory nerve was damaged
shoulder would slump at rest, inability to shrug shoulder or abduct arm, in imaging you would see muscle wasting
12what is the origin of the latissimus dorsi
midline: spinous processes of lower thoracic verts, thoracolumbar fascia
13what is the insertion of the latissimus dorsi
upper limb: anterior humerus (wraps medially and around to front of arm)
14what are the actions of the latissimus dorsi
adducts, extends, and medially rotates arm
15what nerve innervates the latissimus dorsi
thoracodorsal nerve
16what artery does the thoracodorsal nerve run with
thoracodorsal artery
17what is the origin of the levator scapulae
midline: transverse processes of C1-C4
18what is the insertion of the levator scapulae
upper limb: superior part of medial border of scapula
19what are the actions of the levator scapulae
elevates and inferiorly rotates scapula, assist with neck extension
20what is the origin of the rhomboid minor
spinous process of C7-T1
21what is the insertion of the rhomboid minor
med border scapular, at spine
22what is the origin of the rhomboid major
spinous processes of T2-T5
23what is the insertion of the rhomboid major
med border scapula, inferior to spine
24what are the actions of the rhomboid major and minor
retract and elevate scapula
25what nerve innervates the levator scapulae and rhomboids
dorsal scapular nerve
26what artery does the dorsal scapular nerve run along
dorsal scapular artery
27which muscles inserts on the humerus
latissimus dorsi
28what is the origin of the serratus posterior superior
spinous processes of C7-T3
29what is the insertion of the serratus posterior superior
superior borders ribs 2-4
30what action does the serratus posterior anterior perform
elevates ribs
31what is the. origin of the serratus posterior inferior
spinous processes of T11-L2
32what is the insertion of the serratus posterior inferior
inferior borders of ribs 8-12
33what action does the serratus posterior inferior perform
depresses ribs
34what nerve innervates the serratus posterior superior and the serratus posterior inferior
intercostal nerves