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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
Action of levator scapulae
elevate scapula
26
Supply of levator scapulae
dorsal scapular nerve & vessels (same as rhomboids)
27
origin of serratus anterior muscle
lateral surface of first 8 ribs
28
insertion of serratus anterior
anterior surface of medial border of scapula
29
action of serratus anterior
protracts scapula, holds it to body wall
30
supply of serratus anterior
Long thoracic nerve & LATERAL thoracic vessels (SALT- serratus ant, long/lat thoracic)
31
Triangles of superficial back
Triangle of auscultation, Lumbar triangle
32
triangle of auscultation
between ribs 6 and 7, listen to organs in thorax, boundaries- trap, lat, rhombiod major
33
boundaries of lumbar triangle
medial- Latissiumus dorsi, lateral- external oblique m, inferior- iliac crest, floor- internal oblique m
34
origin of serratus posterior superior
C7-T3 spinous processes
35
insertion of serratus posterior superior
superior border of ribs 2-4 (5)
36
action of serratus posterior superior
elevates upper ribs
37
supply of serratus posterior superior
last 4 intercostal nerves and vessels
38
erector spinae origin
posterior sacrum, ilium & spinous processes
39
insertion of erector spinae
spinous & transverse processses, ribs
40
aciton of erector spinae
erect spine (postural muscle)
41
supply of erector spinae
dorsal rami of spinal nerves, lumbar & intercostal vessels
42
origin of Splenius capitis & cervicis
nuchal ligament & upper spinous processes
43
insertion of Splenius capitis & cervicis
Capitis- occipital bone & mastiod process, Cervicis- upper cervical trans process
44
action of Splenius capitis & cervicis
extend & laterally rotate head
45
supply of Splenius capitis & cervicis
dorsal rami of spinal nerves, deep cervical vessels
46
origin of multifundus
sacrum & lower transverse processes
47
insertion of multifundus
spinous processes (span 2-4 vertebrae)
48
action of multifundus
laterally flex & rotate spine
49
supply of multifundus
dorsal rami of spinal nerves, lumbar vessels
50
origin of Rotatores muscles
transverse processes
51
insertion of Rotatores muscles
spinous processes (span 1-2 vertebrae)
52
action of Rotatores muscles
rotate spine (rotatores is latin for "rotates shit")
53
supply of Rotatores muscles
dorsal rami of spinal nerves, intercostal vessels
54
name the minor deep muscles of the back
interspinalis, intertransversarius, levator costarum

anatomy final- muscles (2 decks)

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