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Anat 1 > Deep Back Muscles > Flashcards

Deep Back Muscles Flashcards

1
Q

What are the extrinsic back muscles?

A

The ones that connect lim to axial skeleton (superficial): trapezius, latissimus dorsi, levator scapulae, rhomboideus major and minor. AND the respiratory muscles (intermediate): serratus posterior superior and serratus posterior inferior

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2
Q

Superficial back muscles connect limb to axial skeleton and and innervated by CN XI. What are these extrinsic back muscles?

A 
Trapezius 
Latissimus dorsi
Levator scapulae
Rhomboideus major
Rhomboideus minor
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3
Q

Intermediate back muscles include respiratory muscles that include the serratus posterior group. What are these extrinsic back muscles?

A

Serratus posterior superior and serratus posterior inferior

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4
Q

What are the deep intrinsic back muscles?

A

Superficial: splenius capitus and splenius cervicis

Intermediate: iliocostalis, logissimus, and spinalis

Deep: semispinalis, multifidus, and rotatores

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5
Q

What are the epaxial muscles?

A

Spinalis
Longissimus
Iliocostalis

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6
Q

What are the hypaxial muscles?

A 
Quadratus
Lumborum
External oblique
Internal oblique
Transversus
Rectus abdominus
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7
Q

Serratus posterior superior origin

A

Ligamentum nuchae; spinous processes of C7 and T1-2

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8
Q

Serratus posterior superior insertion

A

Ribs 2-5

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9
Q

Serratus posterior superior action

A

Elevate upper ribs during inspiration

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10
Q

Serratus posterior inferior origin

A

Spinous processes of T11-12 and L1

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11
Q

Serratus posterior inferior insertion

A

Ribs 10-12

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12
Q

Serratus posterior inferior action

A

Pull lower ribs inferiorly and counteracts diaphragm

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13
Q

What are the 2 parts of the spinotrasversalis system?

A

Spenius capitis and splenius cervicis

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14
Q

The sacrospinalis sys aka…

A

Erector spinae

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15
Q

What are the 3 longitudinal bundles that form the sacrospinalis system

A

Iliocostalis, longissimus, and spinalis

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16
Q

What are the 3 groups of muscles that make up the transversospinalis system?

A

Semispinalis,multifidus, rotatores

17
Q

Along either side of the midline of the back is innervated by

A

Dorsal rami of thoracic spinal nerves

18
Q

More laterally along the back is innervated by

A

Lateral cutaneous branches of the intercostal nerves

19
Q

Splenius capitis origin

A

Spinous processes of C7 and T1-4

20
Q

Splenius capitis insertion

A

Superior nuchal line and mastoid

21
Q

Splenius cervicis origin

A

Spinous processes of T3-6

22
Q

Splenius cervicis insertion

A

C1-C4 transverse processes with levator scapulae

23
Q

Iliocostalis is lateral/medial part of the erector spinae group?

A

Lateral

24
Q

Iliocostalis extends back to do what for posture?

A

Keep erect

25
Q

What are the components for iliocostalis?

A

Lumorum, thoracis, cervicis

26
Q

Iliocostalis origin?

A

Ilium and sacrum

27
Q

Iliocostalis insertion?

A

Most of the ribs

28
Q

Longissimus is upper/middle/lower portion of erctor spinae group?

A

Middle

29
Q

Longissimus components:

A

Thoracis, cervicis, capitis

30
Q

Longissimus origin?

A

Transversus processes and sacrum

31
Q

Longissimus insertion?

A

Most of ribs

32
Q

Spinalis origin

A

Spinous processes of T11-L2

33
Q

Spinalis insertion

A

Spinous processes of thoracic and lower cervical vertebrae

34
Q

Multifidus are a thick muscle mass best seen in region of the

A

Sacrum

35
Q

What are the 2 rotatores muscles and how many segments do they each span?

A

Long rotatores-spans 2 segments

Short rotatores-spans 1 segment

36
Q

What are the 2 intrinsic segmental muscles?

A

Interspinales and intertransversarii

Anat 1 (19 decks)

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