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anatomy final- muscles > back muscle lecture > Flashcards

back muscle lecture Flashcards

1
Q

What are the 3 layers of back muscles?

A

Superficial, Intermediate, deep

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2
Q

name the superficial back muscles

A

Trapezius, Levator Scapulae, Rhomboid major/minor, Latissimus Dorsi

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3
Q

Name the intermediate back muscles

A

Serratus posterior inferior/superior

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4
Q

Name the deep back muscles

A

Suboccipital, Splenius, 3 erector spinae muscles

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5
Q

What are the 3 erector spinae muscles?

A

Iliocostalis, Longissimus, Spinalis

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6
Q

Innervation for superficial back muscles

A

Ventral rami

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7
Q

Innervation for intermediate back muscles

A

Ventral rami

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8
Q

Innervation of deep back muscles

A

Dorsal rami

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9
Q

do nerves overlap across the midline of the back?

A

NO- clinical point for surgery

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10
Q

origin of the trapezius muscle

A

Superior nuchal line, spinous processes of C7-T12

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11
Q

Insertion of trapezius muscle

A

Lateral clavicle, acromion and spine of scapula

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12
Q

Action of trapezius

A

elevate, depress and retract scapula

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13
Q

Innervation of trapezius

A

accessory nerve & transverse cervical vessels

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14
Q

Contents of Subtrapezial plexus

A

CN XI and C3-C4 ventral rami (proprioception)

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15
Q

Origin of latissimus Dorsi

A

T7-T12 Spinous processes, TL fascia, crest of ilium

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16
Q

Insertion of latissimus dorsi

A

interturbicular groove of humerus (bicepital groove)

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17
Q

Action of latissimus dorsi

A

adduct, extend, medially rotates humerus

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18
Q

innervation/BS of latissimus dorsi

A

thoracodorsal nerve and intercostal vessels

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19
Q

origin of Rhomboid major/minor

A

C7-T5 spinous processes

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20
Q

Insertion of rhomboids

A

medial border of scapula from spine to inferior angle

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21
Q

Action of rhomboids

A

retract scapula

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22
Q

supply of rhomboids (n & b)

A

dorsal scapular nerve & vessels

23
Q

origin of Levator scapulae

A

transverse process of 1st 3-4 vertebrae

24
Q

Insertion of levator scapulae

A

upper medial border of scapula

25
Q

Action of levator scapulae

A

elevate scapula

26
Q

Supply of levator scapulae

A

dorsal scapular nerve & vessels (same as rhomboids)

27
Q

origin of serratus anterior muscle

A

lateral surface of first 8 ribs

28
Q

insertion of serratus anterior

A

anterior surface of medial border of scapula

29
Q

action of serratus anterior

A

protracts scapula, holds it to body wall

30
Q

supply of serratus anterior

A

Long thoracic nerve & LATERAL thoracic vessels (SALT- serratus ant, long/lat thoracic)

31
Q

Triangles of superficial back

A

Triangle of auscultation, Lumbar triangle

32
Q

triangle of auscultation

A

between ribs 6 and 7, listen to organs in thorax, boundaries- trap, lat, rhombiod major

33
Q

boundaries of lumbar triangle

A

medial- Latissiumus dorsi, lateral- external oblique m, inferior- iliac crest, floor- internal oblique m

34
Q

origin of serratus posterior superior

A

C7-T3 spinous processes

35
Q

insertion of serratus posterior superior

A

superior border of ribs 2-4 (5)

36
Q

action of serratus posterior superior

A

elevates upper ribs

37
Q

supply of serratus posterior superior

A

last 4 intercostal nerves and vessels

38
Q

erector spinae origin

A

posterior sacrum, ilium & spinous processes

39
Q

insertion of erector spinae

A

spinous & transverse processses, ribs

40
Q

aciton of erector spinae

A

erect spine (postural muscle)

41
Q

supply of erector spinae

A

dorsal rami of spinal nerves, lumbar & intercostal vessels

42
Q

origin of Splenius capitis & cervicis

A

nuchal ligament & upper spinous processes

43
Q

insertion of Splenius capitis & cervicis

A

Capitis- occipital bone & mastiod process, Cervicis- upper cervical trans process

44
Q

action of Splenius capitis & cervicis

A

extend & laterally rotate head

45
Q

supply of Splenius capitis & cervicis

A

dorsal rami of spinal nerves, deep cervical vessels

46
Q

origin of multifundus

A

sacrum & lower transverse processes

47
Q

insertion of multifundus

A

spinous processes (span 2-4 vertebrae)

48
Q

action of multifundus

A

laterally flex & rotate spine

49
Q

supply of multifundus

A

dorsal rami of spinal nerves, lumbar vessels

50
Q

origin of Rotatores muscles

A

transverse processes

51
Q

insertion of Rotatores muscles

A

spinous processes (span 1-2 vertebrae)

52
Q

action of Rotatores muscles

A

rotate spine (rotatores is latin for “rotates shit”)

53
Q

supply of Rotatores muscles

A

dorsal rami of spinal nerves, intercostal vessels

54
Q

name the minor deep muscles of the back

A

interspinalis, intertransversarius, levator costarum

anatomy final- muscles (2 decks)

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