PAS407 BLOCK 1 UPDATED ACTUAL Questions and CORRECT Answers
trapezius, latissimus dorsi, levator scapulae, rhomboids extrinsic back muscles (superficial group)
trapezius
superior nuchal line, external occipital protuberance,
origin of trapezius
nuchal ligament, spinous processes of C7-T12
Lateral 1/3 of clavicle, acromion, and spine of scapula Insertion of trapezius
Elevates, retracts, depresses, and rotates scapula action of trapezius
innervation of trapezius
Accessory nerve (CN XI)
Latissimus Dorsi
Spinous processes of T7-T12, thoracolumbar fascia (at-
taches to spinous processes of lumbar vertebrae), iliac origin of latissimus dorsi
crest, inferior 3-4 ribs
Floor of intertubercular groove of humerus (anterior) insertion of latissimus dorsi
Extends, adducts, and medially rotates humerus, depress-
action of latissimus dorsi
es scapula
Thoracodorsal nerve
, innervation of latissimus dorsi
levator scapulae
Posterior tubercles of transverse processes of C1-C4 origin of levator scapulae
Superior part of medial border of scapula (above spine) insertion of levator scapulae
Elevates scapula; tilts glenoid cavity inferiorly by rotating
action of levator scapulae
scapula
Dorsal scapular nerve; cervical nerves C3 and C4 innervation of levator scapulae
rhomboid minor
rhomboid major
nuchal ligament and spinous processes of C7 and T1 origin of rhomboid minor
spinous processes of T2-T5 origin of rhomboid major
Medial border of scapula from spine to inferior angle insertion of rhomboids
, Retract and inferiorly rotate scapula; fix scapula to thoracic
action of rhomboids
wall
Dorsal scapular nerve innervation of rhomboids
serratus posterior superior/inferior deep extrinsic back muscles
serratus posterior superior
nuchal ligament, spinous processes of C7 -T3 origin of serratus posterior superior
superior border of ribs 2-4 or 5 insertion of serratus posterior superior
proprioception, elevates upper ribs action of serratus posterior superior
intercostal nerves 2-5 innervation of serratus posterior superior
Serratus Posterior Inferior
spinous processes of T11-L2 origin of serratus posterior inferior
inferior borders of ribs 8-12 insertion of serratus posterior inferior
proprioception, depresses lower ribs action of serratus posterior inferior
intercostal nerves 9- 12 innervation of serratus posterior inferior
splenius cervicis
splenius capitis
trapezius, latissimus dorsi, levator scapulae, rhomboids extrinsic back muscles (superficial group)
trapezius
superior nuchal line, external occipital protuberance,
origin of trapezius
nuchal ligament, spinous processes of C7-T12
Lateral 1/3 of clavicle, acromion, and spine of scapula Insertion of trapezius
Elevates, retracts, depresses, and rotates scapula action of trapezius
innervation of trapezius
Accessory nerve (CN XI)
Latissimus Dorsi
Spinous processes of T7-T12, thoracolumbar fascia (at-
taches to spinous processes of lumbar vertebrae), iliac origin of latissimus dorsi
crest, inferior 3-4 ribs
Floor of intertubercular groove of humerus (anterior) insertion of latissimus dorsi
Extends, adducts, and medially rotates humerus, depress-
action of latissimus dorsi
es scapula
Thoracodorsal nerve
, innervation of latissimus dorsi
levator scapulae
Posterior tubercles of transverse processes of C1-C4 origin of levator scapulae
Superior part of medial border of scapula (above spine) insertion of levator scapulae
Elevates scapula; tilts glenoid cavity inferiorly by rotating
action of levator scapulae
scapula
Dorsal scapular nerve; cervical nerves C3 and C4 innervation of levator scapulae
rhomboid minor
rhomboid major
nuchal ligament and spinous processes of C7 and T1 origin of rhomboid minor
spinous processes of T2-T5 origin of rhomboid major
Medial border of scapula from spine to inferior angle insertion of rhomboids
, Retract and inferiorly rotate scapula; fix scapula to thoracic
action of rhomboids
wall
Dorsal scapular nerve innervation of rhomboids
serratus posterior superior/inferior deep extrinsic back muscles
serratus posterior superior
nuchal ligament, spinous processes of C7 -T3 origin of serratus posterior superior
superior border of ribs 2-4 or 5 insertion of serratus posterior superior
proprioception, elevates upper ribs action of serratus posterior superior
intercostal nerves 2-5 innervation of serratus posterior superior
Serratus Posterior Inferior
spinous processes of T11-L2 origin of serratus posterior inferior
inferior borders of ribs 8-12 insertion of serratus posterior inferior
proprioception, depresses lower ribs action of serratus posterior inferior
intercostal nerves 9- 12 innervation of serratus posterior inferior
splenius cervicis
splenius capitis
