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DPT: Anatomy > Muscles Of The Trunk > Flashcards

Muscles Of The Trunk Flashcards

1
Q

Iliocostalis Lumborum

A

O: broad tendon from posterior iliac crest, sacrum, SI processes of sacral and inf. lumbar vertebrae

I: Inf. border of angle of ribs 12-6

A: laterally flexes head and vertebral column to same side;
Bilateral activation- extensions of head and trunk

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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2
Q

Iliocostalis Thoracis

A

O: common broad tendon origin; from post. iliac crest, sacrum, SI ligaments, spinous process of sacral/lumbar vertebrae

I: all of the ribs

A: laterally flex head and vert. column to same side
Bilateral activation- extensors of head and trunk

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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3
Q

Iliocostalis Cervicis

A

O: common broad tendon from post. Iliac crest, sacrum, SI ligaments, spinous processes of sacral and Inf. Lumbar vertebrae

I: superior 6 ribs and post. Tubercles of C4-C6

A: laterally flex head and VC to same side
Bilateral activation- extensors of head and trunk

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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4
Q

Longissimus Thoracis

A

O: common origin (broad tendon from PI crest, sacrum, SI ligaments, spinous processes)

I: tips of transverse processes T1-T12 and tubercles of Inf. Border of ribs 9,10

A: lat. flex head and vert. Column to same side
Bilateral activation- extensors of head and trunk

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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5
Q

Longissimus Cervicis

A

O: common origin (broad tendon from PI crest, sacrum, SI ligaments, spinous processes of sacral and Inf lumbar vertebrae); also, have origins on the transverse processes at lower levels

I: sup. Thoracis transverse processes to cervical transverse processes

A: lat. flex head and vert. Column to same side
bilateral activation- ext. of head and trunk

N: dorsal rami of cervical, thoracic, and lumbar nerves

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6
Q

Longissimus Capitis

A

O: common origin (broad tendon from PI crest, sacrum, SI ligaments, spinous processes of sacral and Inf. Lumbar vertebrae; also have origins on the transverse processes at lower levels

I: arises with L. Cervicis and attaches to mastoid process

A: Lat. flex head and VC to same side
Bilateral activation- ext of head and trunk;
Also rotates head to same side

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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7
Q

Spinalis Thoracis

A

O: common origin; from spinous processes of sacral and Inf. Lumbar vertebrae

I: Tips of spinous processes of thoracic vert

A: extensors of VC and head

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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8
Q

Spinalis Cervicis

A

O: common origin; from spinous processes

I: Ligamentum Nuchae to axis

A: extensors of VC; also head

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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9
Q

Semispinalis Thoracis

A

O: transverse processes superomedially T6-10

I: spinous processes T1-T4, C6-7

A: extensors of VC
Unilateral- rotates trunk to opposite side

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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10
Q

Semispinalis Cervicis

A

O: Transverse processes superomedially T1-T6

I: spinous processes C2-C5

A: extensors of VC
Unilateral- rotates trunk/head to opposite side

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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11
Q

Semispinalis Capitis

A

O: transverse processes T1-T6 (C7 articular process)

I: inferior to superior Nuchal line

A: extensor of head
Unilateral- rotates head to opposite side

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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12
Q

Multifidus

A

O: laminae (mammillary process) of S4-C2, including zygapophysial capsule; may be absent in thoracic region

I: superomedially 2-4 vertebrae to SP

A: unilateral- lateral flexion of VC and opposite rotation

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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13
Q

Rotatores Brevis

A

O: transverse processes of entire VC

I: superomedially to SP of next spinous process

A: rotates superior vertebrae to opposite side;
Bilaterally stabilizes superior vertebrae

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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14
Q

Rotatores Longus

A

O: TP of entire VC

I: superomedially to SP of 2nd spinous process

A: rotates superior vert. To opposite side
Bilaterally- stabilizes superior vert.

N: dorsal rami of cervical, thoracic, and lumbar spinal nerves

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15
Q

Splenius Cervicis

A

O: SP of T3-T6

I: TP of C2-5

A: bilateral- extension of cervical region
Unilateral- Lat. flexion and rotation to same side

N: dorsal rami of spinal nerves C4-C8

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16
Q

Splenius Capitis

A

O: SP of C7-T4 and Ligamentum Nuchae

I: lateral part of superior Nuchal line and mastoid process

A: bilateral- extension of cervical region
Unilateral- lateral flexion and rotation to same side

N: dorsal rami of spinal nerves C3-C5

17
Q

Levanter Costarum

A

O: tip of thoracic TP

I: inferolaterally to angle of inferior adjacent rib

A: elevates ribs during inspiration; may help in lateral flexion

N: ventral rami of thoracic spinal nerves

18
Q

Quadratus Lumborum

A

O: iliolumbar ligament and internal lip of iliac crest

I: tips of lumbar TP, inferior border of rib 12

A: extension and lateral flexion of VC; fixes rib 12 during inspiration

N: branches of ventral rami of T12, L1-3(4)

19
Q

Psoas Major

A

O:TP of lumbar vertebrae, sides of body (T12, L1-5, and IV discs)

I: Lesser trochanter of femur

A: Increases lumbar lordosis, assists in lat. flexion, flexes hip/pelvis on trunk

N: lumbar plexus, ranches of primary ventral rami

20
Q

Rectus Abdominis

A

O: pubic crest and symphysis

I: costal cartilages 5-7 and xyphoid process

A: flexion of trunk

N: ventral rami of spinal nerves T5-12

21
Q

External Abdominal Oblique

A

O: ext. surface of ribs 5-8 (ant fibers) and ribs 9-12 (lat fibers)

I: outer lip of iliac crest, linea alba via aponeurosis

A: bilat- flexes trunk; lat fibers act on lumbarregion to tilt pelvis posteriorly
unilat- rotates to opp. side; compresses abdomen

N: ventral rami of spinal nerves; T5-12

22
Q

Internal Abdominal Oblique

A

O: lat. 2/3 of inguinal ligament; iliac crest; thoracolumbar fascia

I: crest of pubis, pectineal line, linea alba

A: upper ant. fibers flex trunk; unilat-work ext. oblique of opp. side to rotate trunk

N: ventral rami of spinal nerves T7-12; iliohypogastric and iliolinguinal nn

23
Q

Transverse Abdominis

A

O: lower 6 ribs, thoracolumbar fascia (attached to TP of lumbar vert), iliac crest, ing. ligament

I: linea alba, pubic crest

A: stabilize trunk via fixation of linea alba; compresses abdomen

N: ventral rami of spinal nerves T7012; iliohypogastric and iliolinguinal n

24
Q

Obliquus Capitis Superior

A

O: TP of C1

I: occipital bone deep to S. capitis and cervicis and superficial to R. capitis post. major and minor

A: rotation at AA joint; extension of AO; a bit of lateral flexion

N: dorsal rami of C1

25
Q

Obiquus Capitis Inferior

A

O: SP of C2; lateral to R capitis post. major

I: TP of C1

A: Ipsilateral rotation at AA joint

N: dorsal rami of C1

26
Q

Rectus Capitis Posterior Major

A

O:SP of C2

I: occipital bone lateral to midline at inf. nuchal line

A: extension at AO joint and ipsilateral rotation at AA

N: dorsal rami of C1

27
Q

Rectus Capitis Posterior Minor

A

O: post. tubercle C1

I: occipital bone, medial to R. capitis post. major

A: extension at AO joint

N: dorsal rami of C1

DPT: Anatomy (20 decks)

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