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Gross Anatomy > Intrinsic Back Muscles > Flashcards

Intrinsic Back Muscles Flashcards

1
Q

Nuchal

A

Nape of the neck

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2
Q

Splenius capitis and splenius cervicis make up

A

Superficial layer of the deep back

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3
Q

Splenius capitis and splenius cervicis
Muscular action

A

Acting unilaterally laterally flexes the neck and rotates to side to the of active muscles
Acting bilaterally extend the neck and head

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4
Q

attatchments of splenius capitis

A

PA nuchal ligament SP of C7-T6 vertebrae
DA mastoid process

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5
Q

Attatchments of splenius cervicis

A

PA nuchal ligament SP of C7-T6
DA attatch to transverse C1-C4

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6
Q

What is the intermediate layer of the deep back

A

Erector spinae group

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7
Q

Action of the erector spinae group

A

Unilaterally laterally flex the vertebral column to the ipslateral side
Bilaterally extend the vertebral column

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8
Q

What are the three names of the erectors? In order of medial to lateral

A

Spinalis
Longissimus
Illiocostalis

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9
Q

What are the sub categories of illiocostalis ?

A

Illiocostalis lumborum
Illiocostalis thoracis
Illiocostalis cervicis

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10
Q

What are the sub groups of longissimus

A

Longissimus thoracis
Longissimus capitis

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11
Q

What are the sub group of spinalis

A

Spinalis thoracis
Spinalis cervicis

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12
Q

Attatchments of the illiocostalis

A

PA Thoraco lumbarfascia
DA lower rib angles and cervical TP

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13
Q

Attatchments of longissimus

A

PA thoraco lumbar fascia
DA mastoid process

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14
Q

Spinalis attatchments

A

PA thoracolumbar fascia
DA Upper thoracic spinous process and cranium

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15
Q

What’s the name of the deep group of the deep back

A

Transverospinalis group

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16
Q

What are the names of the transverospinalis group ?
( in order of deep to superficial)

A

Rotatores
Multifidi
Semispinalis

17
Q

What is the muscle action of the rotatores

A

Unilaterally
Rotate the vertebral column to the contralateral side
Bilaterally
Extend the vertebral column locally

18
Q

Attatchments of the rotatores

A

Thoracic works best
Attatchments
TP of inferior vertebrae and SP of superior vertebrae
1 lvl brevis
2 lvl longus

19
Q

Muscle action of multifidi

A

Unilaterally
Rotate the vertebral column to the contra lateral side
Bilaterally extend the vertebral column
Stabilize the vertebrae during local movements of vertebral column

20
Q

Attatchments of the multifidi

A

Thickest in the lumbar
Inferior attachement
TP of T1-T3 and C4-C7
Psis
Mamillary process of lumbar vertebrae
2-4 vertebral lvl

21
Q

Semispinalis muscle activity

A

Extends the head neck and thoracic spine
Rotates them contralaterally

22
Q

What innervates the semispinalis

A

Cervical dorsal rami and spinal cervical nerves

23
Q

Attatchment of the semispinalis

A

IA TP of C4 to T12
SA Fibers run superomedially to occipital bone and SP in thoracic and
cervical regions
Spans 4-6 vertebral lvls

24
Q

What muscles make up the suboccipital triangle

A

Obliquus capitis superior
Obliquus capitis inferior
Rectus capitits posterior major

25
Q

The subboccipital group

A

Obliquus capitis superior
Obliquus capitis inferior
Rectus capitis posterior major
Rectus capitis posterior minor

26
Q

Attatchments of capitis posterior major

A

PA spinous process of C2
DA lateral inferior nuchal line

27
Q

Attatchment of rectus capitis posterior minor

A

PA PT of C1
DA medial inferior nuchal line

28
Q

Obliquus capitis inferior attatchments

A

PA SP of C2
DA TP of C1

29
Q

Obliquus capitis superior attatchments

A

PA TP of C1
DA occipital bone between superior and inferior nuchal lines

30
Q

What nerve innervates the subboccipital triangle

A

Suboccipital nerve

31
Q

What is the roof of the suboccipital triangle

A

Semispinalis capitis

32
Q

What is the floor of the subboccipital triangle

A

Posterior antlanto-occipital membrane and posterior arch of vertebra C1

33
Q

Subboccipital nerve

A

Origin
Posterior ramus of spinal nerve C1
Distributes
To muscles of suboccipital muscles

34
Q

Greater occipital nerve

A

Posterior ramus of spinal nerve C2
Distributes
Skin over the neck and occipital bone

35
Q

Lesser occipital nerve

A

Origin
Anterior rami of spinal nerve C2-C3
Skin of posterolateral neck and scalp posterior to external ear

36
Q

Posterior rami

A

Origin C3-C7
Distribution
Intrinsic muscles of back and overlaying skin
(adjacent to vertebral column)

Gross Anatomy (6 decks)

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