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Muscles of back/upper extremity > Back > Flashcards

Back Flashcards

1
Q

Superficial extrinsic muscles of back

A

trapezius and latissimus dorsi

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2
Q

Deep extrinsic muscles of back

A

levator scapulae, rhomboid minor, and rhomboid major

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3
Q

Intermediate extrinsic muscles of back

A

serratus posterior superior and serratus posterior inferior

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4
Q

Superficial intrinsic muscles of back

A

splenius (capitis + cervicis)

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5
Q

Intermediate intrinsic muscles of back

A

erector spinae = spinalis, longissimus, iliocostalis

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6
Q

Divisions of erector spinae

A

spinalis: capitis, cervicis, and thoracis
longissimus: capitis, cervicis, and thoracis
iliocostalis: cervicis, thoracis, and lumborum

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7
Q

Deep intrinsic muscles of back

A

transversospinalis =

semispinalis, multifidus, and rotatores

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8
Q

Divisions of semispinalis

A

capitis, cervicis, and thoracis

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9
Q

Actions of trapezius

A

elevates (superior fibers), depresses (lower fibers), and retracts (medial fibers) scapula

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10
Q

Innervation of trapezius

A

cranial nerve XI (spinal accessory nerve) - main, motor

(sensory) ventral rami of C3 and C4

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11
Q

Blood supply of trapezius

A

transverse cervical artery (superficial branch)

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12
Q

Actions of latissimus dorsi

A

extenson, adduction, and medial rotation of arm

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13
Q

Innervation of latissimus dorsi

A

thoracodorsal nerve

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14
Q

Blood supply of latissimus dorsi

A

thoracodorsal artery at intertubercular sulcus

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15
Q

Attachments of trapezius

A

Proximal: external occipital protuberance, spinous processes of C7 and thoracic, nuchal ligament
Distal: lateral third of clavicle, acromion and spine of scapula, and medial end of spine of scapula

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16
Q

Attachments of latissimus dorsi

A

Proximal: spines of T + L vertebrae, ribs, and iliac crest
Distal: intertubercular sulcus on humerus

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17
Q

Attachments of rhomboid minor

A

Proximal: nuchal ligament and spinous processes C7-T1
Distal: medial border of scapula at level of spine of scapula

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18
Q

Attachments of rhomboid major

A

Proximal: spinous processes of upper T vertebrae
Distal: medial border of scapula inferior to spine of scapula

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19
Q

Attachments of levator scapulae

A

Proximal: transverse processes of upper C vertebrae
Distal: superior angle of scapula

20
Q

Innervation of rhomboids (major and minor)

A

dorsal scapular nerve

21
Q

Blood supply of rhomboids (major and minor)

A

dorsal scapular artery

22
Q

Innervation of levator scapulae

A

dorsal scapular nerve

23
Q

Blood supply of levator scapulae

A

dorsal scapular artery

24
Q

Actions of levator scapulae

A

elevates or inferiorly rotates scapula

25
Q

Actions of rhomboids (major and minor)

A

retracts, inferiorly rotates, and fixes scapula

26
Q

Actions of serratus posterior superior

A

elevates ribs, forced inspiration

27
Q

Actions of serratus posterior inferior

A

depresses ribs, forced expiration

28
Q

Innervation of serratus posterior superior

A

ventral rami of intercostal nerves (first 4) T2-T5

29
Q

Innervation of serratus posterior inferior

A

ventral rami of intercostal nerves (last 4) T9-T12

30
Q

Attachments of serratus posterior superior

A

Proximal: nuchal ligaments and spines of lower C/upper T
Distal: superior border of ribs 2-5

31
Q

Attachments of serratus posterior inferior

A

Proximal: spinous processes of lower T/upper L
Distal: inferior border of ribs 9-12

32
Q

Attachments of splenius

A

Proximal: nuchal ligament and spinous processes of lower C/upper T
Distal: capitis- mastoid process and lateral third of nuchal line
cervicis- transverse processes of upper C

33
Q

Innervation of splenius

A

dorsal rami

34
Q

Innervation of erector spinae

A

dorsal rami

35
Q

Innervation of transversospinalis muscles (semispinalis, multifidus, rotatores)

A

dorsal rami

semispinalis capitis: greater occipital nerve (C2)

36
Q

Blood supply of splenius

A

transverse cervical artery

37
Q

Actions of splenius

A

unilateral- lateral flexion of neck and rotation to active side
bilateral- extension of head and neck

38
Q

Actions of erector spinae

A

unilateral- bend laterally to active side

bilateral- extension of head and vertebral column

39
Q

Actions of transversospinalis muscles

A

stabilizes vertebral column
semispinalis and rotatores: assist with rotation
semispinalis: extension of head and T and C vertebrae

40
Q

Attachments of transversospinalis muscles (gen.)

A

Proximal: transverse processes of vertebrae
Distal: spinous processes of superior vertebrae

41
Q

Attachments of spinalis

A

Proximal: spine
Distal: spinous processes

42
Q

Attachments of longissimus

A

Proximal: thoracolumbar fascia on iliac crest
Distal: transverse processes or proximal to angles of ribs

43
Q

Attachments of iliocostalis

A

Proximal: iliac crest, sacrum, lumbar spinous processes, and thoracolumbar fascia
Distal: ribs

44
Q

Blood supply of erector spinae

A

spinalis and longissimus: lateral sacral artery

iliocostalis: intercostal and lumbar arteries

45
Q

Attachments of interspinalis

A

Proximal: superior surface of spinous processes of C+L vertebrae
Distal: inferior surface of spinous processes of vertebrae directly above

46
Q

Actions of interspinalis

A

extension of vertebral column

47
Q

Innervation of interspinalis

A

dorsal rami

Muscles of back/upper extremity (12 decks)

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