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ANP402 > 3 Muscles of the Back > Flashcards

3 Muscles of the Back Flashcards

1
Q

extrinsic back muscles

A

**hypaxial

superficial extrinsic group
intermediate extrinsic group

I: ventral rami of spinal nerves

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2
Q

muscles of the superficial extrinsic group

A 
trapezius 
latissimus dorsi
rhomboid major
rhomboid minor
levator scapulae
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3
Q

trapezius

A

**superficial extrinsic group

O: nuchal ligament + spinous process C7 – T12
I: clavicle + medial border of scapula
A: elevate, retract, rotate scapula superiorly
N: CNXI + C3-C4

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4
Q

latissimus dorsi

A

**superficial extrinsic group

O: spinous process T7 – T12 + iliac crest + thoracolumbar fascia
I: intertubercular groove of humerus
A: extend, adduct, medially rotate humerus
N: thoracodorsal nerve

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5
Q

rhomboid major

A

**superficial extrinsic group

O: spinous process T2-T5
I: medial border of scapula
A: retract/rotate scapula inferiorly + fix scapula against thoracic wall
N: dorsal scapular nerve

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6
Q

rhomboid minor

A

**superficial extrinsic group

O: spinous process C7-T1
I: medial border of scapula
A: retract/rotate scapula inferiorly + fix scapula against thoracic wall
N: dorsal scapular nerve

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7
Q

levator scapulae

A

**superficial extrinsic group

O: transverse process C1 – C4
I: superior angle of scapula
A: elevate + rotate scapula inferiorly
N: dorsal scapular nerve

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8
Q

muscles of the intermediate extrinsic group

A

serratus posterior superior

serratus posterior inferior

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9
Q

serratus posterior superior

A

**intermediate extrinsic group

SA: nuchal ligament + spinal process C7 – T3
IA: superior border of ribs 2 – 4
A: elevate ribs
N: intercostal nerve 2 – 5

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10
Q

serratus posterior inferior

A

**intermediate extrinsic group

SA: spinal process T11 – L2
IA: inferior border of ribs 8-12
A: depress ribs
N: T9 – T12

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11
Q

(intrinsic) deep back muscles

A

**aka epaxial

superficial group
intermediate group
deep group

I: dorsal rami of spinal nerve

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12
Q

deep superficial group

A

splenius capitis

splenius cervicis

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13
Q

splenius capitis

A

**deep superficial group

O: nuchal ligament + spinal process C7 – T6
I: mastoid process
A: (bilateral) extend head/neck
(unilateral) lateral flexion of neck + ipsilateral rotation of head
N: dorsal rami

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14
Q

splenius cervicis

A

**deep superficial group

O: nuchal ligament + spinal process C7 – T6
I: transverse process C1 – C3
A: (bilateral) extend head/neck
(unilateral) lateral flexion of neck + ipsilateral rotation of head
N: dorsal rami

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15
Q

deep intermediate group

A

(erector spinae)
iliocostales
longissimus
spinales

**I Love Spaghetti

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16
Q

iliocostales

A

**deep intermediate group - erector spinae lateral (broadest)

O: posterior iliac crest + posterior sacrum + spinal process of lumbar/sacral vertebra
I: ribs + transverse process of cervical vertebrae
A: (bilateral) extend vertebral column y head/neck
(unilateral) ipsilateral flexion of vertebral column
N: dorsal rami

subtypes: lumborum, thoracis, cervicis

17
Q

longissimus

A

**deep intermediate group - erector spinae middle

O: posterior iliac crest + posterior sacrum + spinal process of lumbar/sacral vertebra
I: ribs & transverse process of cervical/thoracic vertebrae
mastoid process
A: (bilateral) extend vertebral column y head/neck
(unilateral) ipsilateral flexion of vertebral column
N: dorsal rami

subtypes: thoracis, cervicis, capitis

18
Q

spinales

A

**deep intermediate group - erector spinae medial (narrowest)

O: posterior iliac crest + posterior sacrum + spinal process of lumbar/sacral vertebra
I: spinal process of cervical/thoracic vertebrae
A: (bilateral) extend vertebral column y head/neck
N: dorsal rami

subtypes: thoracis cervicis

19
Q

deep deep group

A

(transversospinalis group)
semispinalis
multifidus
rotatores

interspinales
intertransversarii

20
Q

transversospinalis group

A

deep deep group

semispinalis
multifidus
rotatores

**Says Mama Ragu

21
Q

semispinalis

A

**deep deep (transversospinalis) group

O: transverse process
I: spinal process of more superior vertebrae
A: contralateral rotation + (bilateral) extend y stabilize vertebral column
N: dorsal rami

subtypes: thoracis, cervicis, capitis

22
Q

multifidus

A

**deep deep (transversospinalis) group

O: transverse process
I: spinal process of more superior vertebrae
A: contralateral rotation + (bilateral) extend y stabilize vertebral column
N: dorsal rami

powerful rotator
very meaty compared to rotatores

23
Q

rotatores

A

**deep deep (transversospinalis) group

O: transverse process
I: spinal process of more superior vertebrae
A: contralateral rotation + (bilateral) extend y stabilize vertebral column
N: dorsal rami

powerful rotator

24
Q

interspinales

A

**deep deep group

O: unite spinal process of consecutive vertebrae
I: unite spinal process of consecutive vertebrae
A: extend vertebral column
N: dorsal rami

25
Q

intertransversarii

A

**deep deep group

O: unite transverse process of consecutive vertebrae
I: unite transverse process of consecutive vertebrae
A: (bilateral) extend vertebral column
(unilateral) ipsilateral flexion of vertebral column
N: ventral rami

26
Q

subocciptal muscles

A

rectus capitis posterior major
rectus capitis posterior minor
obliquus capitis superior
obliquus capitis inferior

I: subocciptal nerve (dorsal rami)
FCN: posture, aid in head rotation

**direction of fibers gives clue toaction

27
Q

rectus capitis posterior major

A

**suboccipital muscle

O: spinal process C2
I: inferior nuchal line (occipital bone)
A: (bilateral) extend @ C0 – C1
(unilateral) ipsilateral rotation @ C1 – C2
N: suboccipital nerve (dorsal ramus C1)

28
Q

rectus capitis posterior minor

A

**suboccipital muscle

O: posterior arch C1
I: inferior nuchal line (occipital bone)
A: (bilateral) extend @ C0 – C1
(unilateral) ipsilateral rotation @ C1 – C2
N: suboccipital nerve (dorsal ramus C1)

29
Q

obliquus capitis superior

A

**suboccipital muscle

O: transverse process C1
I: occipital bone
A: extension & lateral flexion of head
N: suboccipital nerve (dorsal ramus C1)

30
Q

obliquus capitis inferior

A

**suboccipital muscle

O: spinal process C2
I: transverse process C1 (does not touch occipital bone)
A: ipsilateral rotation of head
N: suboccipital nerve (dorsal ramus C1)

ANP402 (19 decks)

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