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ANATOMY OF THE TRUNK > WEEK 4 > Flashcards

WEEK 4 Flashcards

Musculature of the Vertebral Column

1
Q

Where do myoblasts from the epimere originate from?

A

Dorsal medial lip become epaxial muscles

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2
Q

Where do myoblasts from the hypomere originate?

A

Ventral Lateral Lip becomes hypaxial muscle

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3
Q

Are prevertebral muslces intrinsic or extrinsic?

A

Both, intrinsic and extrinsic

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4
Q

Why do hypaxial muscles not move the vertebral column

A

prevertebral

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5
Q

What muscles groups make up the deep intrinsic musculature?

A

Intertransversarii

Interspinales

Transverso-spinales

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6
Q

Where is the interspinales muscle and the ligament that runs medially?

A

Located between spinous processes

Lateral to the interspinous ligament

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7
Q

Where is the Intertransversarii located and what ligament runs anteriorly and posteriorly and what is its action?

A

Located: Between TVP

Ant/Pos to intertransverse ligament

Action: proproreceptive, too thin to provide structural support

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8
Q

Name the three groups of muscles of the Transversospinales muscles

A

Semispinales

Multifidus

Rotatores

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9
Q

Name the three subgroups of the semispinales

A

Semispinales capitis

Semispinales cervicis

semispinales thoracis

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10
Q

name the three subgroups of the rotatores

A

Rotatores lumborum

Rotatores thoracis

Rotatores cervicis

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11
Q
A
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12
Q
A
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13
Q

What is the O + I of Semispinalis capitis?

A

O: TVP of cervical and thoracic spine

I: nuchal ligament

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14
Q

What part of the vertebrae is the semispinalis muscles best identified in?

A

Cervical Spine

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15
Q

What part of the vertebrae is the multifidus most developed?

A

Lumbar spine

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16
Q

What part of the vertebae is the rotatores well developed in?

A

Thoracic spine

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17
Q

What do all the Transversospinales muscle s(semispinalis, multifidus, rotatores) have in common regarding their location?

A

They all run from TVP inferiorly to SP superiorly

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18
Q

What is the O + I of the Semispinalis cervicis?

A

O: TVP of upper throacic spine

I: SP of cervical spine

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19
Q

What is the O + I of the semispinalis thoracis?

A

O: TVP of lower thoracic spine

I: SP of upper thoracic and lower cervical spine

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20
Q

What are the actions of the semispinalis muscle group?

A

Bilateral = Extend the head

Unilateral = Rotates to controlateral spine

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21
Q

how many laminar segments do the Rotatores brevis skip?

A

1 lamina segment

22
Q

how many laminar segments do the rotatores longus extend to?

A

2 laminar segments

23
Q

What are the actions of the rotatoes?

A

proproreception

postoral control

24
Q

What is the O + I of the Multifidus?

A

O: Posterior superior illiac spine

I: Spinous Processes if cervical, lumbar and thoracic spine

25
Q

Where do the fibers of the multifidus originate?

A

Mamillary processes

26
Q

What are the actions of the multifidus?

A
  • extention of the spine. no FLEXION
  • proproreception
  • vertebral inter-segmental stabilisation
27
Q

What is the O + I of the Levator costarum?

A

O: TVP of thoracic vertebrae

I: inferior rib between tubercle and angle

28
Q

what is hte action of the levator costarum?

A

proprorection

elevate the ribs in respiration

29
Q

what is the embryology and innovation of the levator costarum?

A

Embryology: Epaxial muscle, from the dorsal medial lip

Innovated by the dorsal primary ramus

30
Q

What are the sub-occipital muscles of the deep intrinsic musculature?

A
  • rectus capitis posterior major
  • rectus capitis posterior minor
  • oblique captis superiorus
  • oblique capitis inferioris
31
Q

rectus capitis posterior major O + I and embryology?

A

O: SP of C2

I: Lateral part of inferior nuchal line

Epaxial

32
Q

Rectus capitis posterior minor O + I and embryology?

A

O: Posterior tubercle of C1

I: Medial ipart of the occipital bone below the inferior nuchal line

Epaxial

33
Q

What are the actions of the rectus capitis posterior major and minor?

A

Stabalizes the Atlanto-axial and atlanto-occipital joints

Unilateral: Ipsilateral rotation

Bilateral: Extend the head at the A-O joint

34
Q

What is the Obliquus capitis superioris O + I and action?

A

O: TVP of C1

I: Inferior nuchal ligament of occipital bone

A: Unilateral = lat flex

Bilateral = Extend the head at the A-O joints

35
Q

What is the O + I and action of the Obliquues Capitis Inferioris?

A

O: SP of C2

I: TVP of C1

A: Bilaterally = Extends head at A-O Joint

Unilaterally = Ipsilateral roation of the A-A joint

36
Q

What are the intermediate intrinsic musculature of the back (erector spinae group)?

A

Erector spinae divides into three sections:

  • iliocostalis
  • longissimus
  • spinalis
37
Q

What are the three parts of the ilicostalis muscles of the erector spinae?

A

Iliocostalis cervicis

iliocostalis thoracis

iliocostalis lumborum

38
Q

What is the O + I of the iliocostalis cervicis?

A

O: angle of upper ribs (posteriorly)

I: Posterior tubercle of cervical vertebrae

39
Q

What is the O + I of the iliocostalis thoracis

A

O: Lower 6 ribs

I: angles of the upper 6 ribs

40
Q

what is the O + I of the iliocostalis lumborum?

A

O: Common tendon of the erector spinae

I: Angles of lower 6 ribs

41
Q

What are the three muscles of the longissimus?

A

Longissimus capitis

Longissimus cervicis

Longissius thoracis

42
Q

What is the orientation and insertion of the longissimus capitis?

A

O:Mastoid ptcoess of temporal bone

I: TVP of upper thoracic vertebrae

43
Q

what is the orienation and insertion of the longissimus cervicis?

A

O: TVP of thoracic spine

I: Posterior tubercles of cervical vertebrae

44
Q

what is the orientation and insertion of the longissimus thoracis?

A

O: Common tendon of Erector spinale

I: TVP of lumbar and thoracic vertebrae + all ribs following

45
Q

What are the three spinalis muscles (from erector spinae intermediate intrinsic musculature)?

A

Spinalis capitis

Spinalis cervicis

Spinalis thoracis

46
Q

Which spinalis muscle from the intermediate intrinsic musculatre of the erector spinae does not really exist?

A

Spinalis capitis muscle

(moves in mysterious ways)

47
Q

What are the O +I of the spinalis cervicis?

A

O: Nuchal ligament

I: SP of C2

48
Q

What is the O + I of Spinalis Thoracis?

A

Blends with longissimus laterally

O: SP LOWER THORACIC AND UPPER CERVICLE

I: T1-4 spinous process

49
Q
A
50
Q
A

ANATOMY OF THE TRUNK (3 decks)

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