BLOCK 1 BACK/ARM FINAL Flashcards
Trapezius attachments
P: external occipital protuberance, nuchal ligament, spinous C7-T12
D: lateral 1/3 clavicle, acromion and spine of scapula
Trapezius innervation
CN XI
sensory: ventral rami C3, C4
Trapezius blood supply
superficial branch of transverse cervical artery
Latissimus dorsi attachments
P: spinous T7-T12, thoracolumbar fascia, iliac crest, ribs 9-12
D: intertubercular sulcus of humerus
Trapezius actions
elevate/depress scapula, retract and rotate glenoid cavity superiorly
Latissimus dorsi innervation
thoracodorsal nerve
Latissimus dorsi blood supply
thoracodorsal nerve (C6, C7, C8)
Latissimus dorsi actions
extends, adducts, medially rotates humerus, elevates body
Rhomboid minor attachments
P: spinous C (6, 7)
D: medial border of scapula
Rhomboid major attachments
P: spinous T (1-4)
D: medial border of scapula
Rhomboid minor innervation
dorsal scapular nerve (C5)
Rhomboid minor blood supply
dorsal scapular artery
Rhomboid minor actions
retracts and inferiorly rotates scapula
connects scapula to spinal column
Rhomboid major actions
retracts and inferiorly rotates scapula
connects scapula to spinal column
Rhomboid minor innervation
dorsal scapular nerve (C5)
Rhomboid minor blood supply
dorsal scapular artery (C5)
Levator scapulae attachments
P: transverse processes C (1-4)
D: superior angle of scapula
Levator scapulae actions
elevates and rotates scapula
Levator scapulae innervation
dorsal scapular nerve (C5)
Levator scapulae blood supply
dorsal scapular artery
Serratus posterior superior attachments
P: spinous C, T (C7-T3)
D: superior border ribs 2-5
Serratus posterior superior actions
elevates ribs, assists forced inspiration
Serratus posterior superior innervation
ventral rami of intercostal nerves T2-T5
Serratus posterior superior blood supply
intercostal arteries
Serratus posterior inferior attachments
P: spinous T, L (T11-L2)
D: inferior border ribs 9-12
Serratus posterior inferior actions
elevates ribs, assists forced expiration
Serratus posterior inferior innervation
ventral rami of intercostal nerves T9-T12
Serratus posterior inferior blood supply
intercostal arteries
Splenius cervicis attachments
P: spinous C7-T3, lower nuchal ligament
D: tubercles of transverse processes C1-C3 (meets suboccipital triangle mm.)
Splenius cervicis actions
alone: rotates ipsilaterally
together: extend head and neck