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Muscles O,I&A's > Muscles of the back > Flashcards

Muscles of the back Flashcards

1
Q

Origin of Iliocostalis

A

Iliac crest and sacrum

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2
Q

Insertion of Iliocostalis

A

Angles of ribs

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3
Q

Origin of Longissimus

A

TVP’s at inferior vertebral levels

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4
Q

Action of Iliocostalis

A

Extends and laterally bends trunk and neck

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5
Q

Insertion of Longissimus

A

TVP’s at superior vertebral levels and mastoid process

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6
Q

Action of Longissimus

A

Extends and laterally bends trunk and neck

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7
Q

Origin of Spinalis

A

SP’s of vertebrae below

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8
Q

Insertion of Spinalis

A

SP’s of vertebrae above (includes base of skull)

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9
Q

Action of Spinalis

A

Extends and laterally bends the trunk and neck

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10
Q

What makes up the Erector Spinae group

A

Spinalis, iliocostalis, longissimuss

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11
Q

What makes up the intrinsic back muscles

A

Interspinalis & Intertransversarii

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12
Q

Origin of Interspinales

A

Upper border of spinous processes

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13
Q

Insertion of Interspinales

A

Lower border of SP’s above

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14
Q

Action of Interspinales

A

Extends trunk and neck

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15
Q

Origin Intertransversarii

A

Upper border of TVPS

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16
Q

Insertion of Intertransversarii

A

Lower border of TVPS above

17
Q

Action of Intertransversarii

A

Laterally bends trunk and neck

18
Q

Origin of multifidus

A

Sacrum, TVPS of C3-L5

19
Q

Insertion of multifidus

A

SP’s 2-4 levels above their origin

20
Q

Action of Multifidus

A

Extends and laterally bends trunk and neck
Rotates to opposite side then what muscle s on

21
Q

What makes up the Transversospinalis muscles

A

Multifidus,
Rotatores,
Semispinalis

22
Q

Origin of Rotatores

A

TVPS

23
Q

Insertion of Rotatores

A

Long rotatores : SP’s 2 vertebrae above origin
Short rotatores: SP’s 1 vertebrae above orgin

24
Q

Action of Rotatores

A

Rotates vertebral column to opposite side

25
Q

Action of Semispinals

A

Extends and laterally bends the trunk and rotates trunk to opposite side

Muscles O,I&A's (27 decks)

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