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
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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
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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
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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
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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
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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
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7
Q

subclavius

A
  • BL: rib 1 > undersurface of clavicule
  • SC segment: C5-6
  • action:depression and stabilization of clavicle
  • innervation: subclavian nerve
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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)
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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
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10
Q

intrinsic muscles

A
  • deep to thoracolumbar fascia and extrinsic muscles
  • movement/stabilization of vertebral column, maintain posture
  • 3 layers:
    • superficial
    • intermediate
    • deep
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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)
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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)
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13
Q

external occipital protuberance

A
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14
Q

spinous process of 7th cervical vertebra

A

vertebra prominens

not bifid

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15
Q

spine of scapula

A
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16
Q

acromion of scapula

A
17
Q

medial border of scapula

A

“vertebral border”

18
Q

inferior angle of scapula

A
19
Q

spinous processes of thoracic vertebrae

A
20
Q

iliac crest

A
21
Q

posterior superior iliac spine

A
22
Q

areas of skin associated with a single spinal segment/nerve

A

dermatome