superficial back LOs Flashcards
1
Q
latissimus dorsi
A
- BL: lower thoracic spinous processes/iliac crest > floor of intertubercular sulcus of humerus
- SC segment: C6-8
- action: adduction/extension/medial rotation of humerus
- innervation: thoracodorsal nerve
2
Q
levator scapulae
A
- BL: transverse processes C1-C4 > superior angle/superomedial scapula border
- SC segment: C4-C5
- action: elevation/downward rotationof scapula
- innervation: dorsal scapular nerve
3
Q
pectoralis major
A
- BL: clavicle/sternum > lateral lip of intertubercular sulcus of humerus
- SC segment: C5-C6 (clavicular head), C7-T1 (sternocostal head)
- action: humeral adduction/flexion/medial rotation
- sternocostal portion assists with extension of flexed arm
- innervation: medial and lateral pectoral nerves
4
Q
pectoralis minor
A
- BL: ribs 3-5 > coracoid process
- SC segment: C5-T1
- action: anterior tilt of scapula, shoulder depression, forced inspiration
- innervation: medial and lateral pectoral nerves
5
Q
rhomboids
A
- BL: T2-5/C7-T1 > medial scapula border
- SC segment: C4-5
- action: scapular retraction, elevation, downward rotation
- innervation: dorsal scapular nerve
6
Q
serratus anterior
A
- BL: rib 1-8/10 > costal surface of medial border of scapula
- SC segment: C5-7
- action: scapular protraction, upward rotation
- innervation: long thoracic nerve
7
Q
subclavius
A
- BL: rib 1 > undersurface of clavicule
- SC segment: C5-6
- action:depression and stabilization of clavicle
- innervation: subclavian nerve
8
Q
trapezius
A
- BL: external occipital protuberance/cervical and thoracic spinous processes > clavicle/acromion/scapular spine
- SC segment: C3-4
- action: scapular elevation. depression, retraction, upward rotation
- innervation: accessory nerve (CN XI)
9
Q
extrinsic muscles
A
- superficial to thoracolumbar fascia and intrinsic muscles
- involves in movements of shoulder/pectoral girdle and ribs
- 2 layers:
- superficial: limb movement
- intermediate: proprioception and respiration
- axioappendicular muscles
- where triangle of auscultation is found
10
Q
intrinsic muscles
A
- deep to thoracolumbar fascia and extrinsic muscles
- movement/stabilization of vertebral column, maintain posture
- 3 layers:
- superficial
- intermediate
- deep
11
Q
extrinsic muscle list
A
- superficial: axioappendicular/limb movement
- trapezius (crainial nerve innervation)
- latissimus dorsi, levator scapulae, rhomboids (anterior/ventral rami of spinal nerve)
- intermediate: respiration/proprioception
- serratus posterior superior, serratus posterior inferior (anterior rami of spinal nerve/intercostal nerve in periphery)
12
Q
intrinsic muscles list
A
- superficial: VC movement/stabilization
- splenius: capitis, cervicis (posterior/dorsal rami of spinal n.)
- intermediate: VC movement/stabilization
- erector spinae: spinalis, longissimus, iliocostalis (dorsal rami)
- deep: VC movement/stabilization
- transverse spinales: semispinalis, multifidus, rotatores (dorsal rami)
13
Q
external occipital protuberance
A
14
Q
spinous process of 7th cervical vertebra
A
vertebra prominens
not bifid
15
Q
spine of scapula
A