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anatomy > Back Muscles > Flashcards

Back Muscles Flashcards

0
Q

Middle Trapezius

A

P: spinous process T1-T5
D: medial margin of acromion, spine of scapula
I: accessory nerve (CN XI)
A: scapular adduction

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1
Q

Upper Trapezius

A

Proximal: external occipital protuberance, medial 1/3 of superior nuchal line, ligamentum nuchae, spinous process C7
Distal: lateral 1/3 of clavicle
Innervation: accessory nerve (CN XI)
Action: elevation of scapula, capital extension, cervical extension, rotation of head to opposite side, (with lower trap) upward rotation of the scapula

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2
Q

Lower Trapezious

A

P: spinous process T6-T12
D: spine of scapula tubercle
I: C3, C4 with contributions from accessory nerve
A: scapular adduction, scapular upper rotation, scapular depression

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3
Q

Latissimus Dorsi

A

P: Thoracolumbar fascia (sp of T6-T12, sp of lumbar and sacral), ribs 9-12, iliac crest
D: floor of inter-tubercular groove
I: thoracodorsal nerve (C6-C8)
A: extends, adducts, medially rotates humerus; with insertion fixed, will hyperextend spine and anteriorly tilt pelvis

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4
Q

Levator Scapulae

A

P: posterior tubercles of transverse precesses if C1-C4
D: medial border of scapula superior to spine of scapula
I: dorsal scapular nerve (C5), C3, C4
A: Scapular elevation, adduction, and downward rotation; Cervical rotation to same side, cervical bending to same side; assists in cervical extension (bilateral)

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5
Q

Rhomboid Minor

A

P: ligamentum nuchae, sp of C7 and T1
D: root of scapular spine
I: dorsal scapular nerve (C5)
A: scapular adduction, scapular downward rotation, scapular elevation

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6
Q

Rhomboid Major

A

P: sp of T2-T5
D: medial border of scapula from spine to inferior angle
I: dorsal scapular nerve (C5)
A: scapular adduction, downward rotation, scapular elevation

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7
Q

Splenius Capitus

A

O: ligamentum nuchae at C3-C7, sp C7-T4
I: mastoid process, occipital bone inferior to the later 1/3 of the superior nuchal line
I: dorsal rami C1, C2, C3-C6
A: capital extension (bilaterally), rotation of head to same side, lateral bending head to same side (unilaterally)

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8
Q

Splenius Cervicis

A

O: sp T3-T6
I: transverse process p C1-C3
I: dorsal rami C4-C8
A: extend neck (bilaterally), rotation and lateral bending of cervical spine to same side (unilaterally)

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9
Q

Seratus Posterior Superior

A

O: inferior of ligamentum nuchae, sp C7, T1-T3
I: ribs 2-5
I: ventral rami of T2-T5
A: proprioception, lift ribs

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10
Q

Seratus Posterior Inferior

A

O: thoracolumbar fascia (sp T11, T12, L1, L2)
I: inferior 3-4 ribs near their angels
I: ventral rami T9-T12
A: depress inferior rib

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11
Q

Illiocostalis Lumborum

A

O: common origin if erector spinae muscles is through the broad tendon (attached inferiorly to the posterior part of the iliac crest, posterior sacrum, supraspinous ligaments, sacrotuberous and sacroiliac ligaments, sp T12, L1-L5)
I: angles of the lower six or seven ribs and transverse processes of all lumbar vertebrae
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex vertebral column

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12
Q

Iliocostalis Thoricis

A

O: ribs 12-7
I: upper 6 ribs and transverse process of C7
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex vertebral column

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13
Q

Iliocostalis Cervicis

A

O: angles of ribs 3-6
I: transverse processes of C4-C6
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex vertebral column

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14
Q

Longissimus Thoracis

A

O: blends with iliocostalis in lumbar region, transverse and accessory processes of L1-L5, anterior layer of thoracolumbar fascia
I: transverse processes of all thoracic vertebrae, later to tubercles of lower 9-10 ribs
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex vertebral column

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15
Q

Longissimus Cervicis

A

O: transverse processes of T1-T5
I: posterior tubercles of transverse processes of C2-C6
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex vertebral column

16
Q

Longissimus Capitis

A

O: transverse processes of upper 4-5 thoracic vertebrae and articular processes of lower 3-4 cervical vertebrae
I: posterior margin of mastoid process
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex head or vertebral column, rotate head to same side

17
Q

Spinalis (thoracis, cervicis, capitis)

A

O: sp of thoracic
I: sp of cervical
I: dorsal rami
A: extensor of vertebral column (maintain erect posture), laterally flex head or vertebral column

18
Q

Semispinalis (thoracis, cervis, cepitis)

A

O: transverse process (C4-T12)
I: spinous process up 4-6, cervis attach C2, capitis attach to head, occiput inferior nuchal line
I: dorsal rami

19
Q

Multifidus

A

O: transverse process
I: sp up 2-4
I: dorsal rami
A: laterally flex trunk or rotate to opposite side

20
Q

Rotatores

A

O: transverse process
I: spinous process up 1-2
I: dorsi rami

21
Q

Interspinales & Intertransversari

A

Unite spinous processes or transverse processes

22
Q

Levator Costarum

A

O: transverse process
I: ribs (1 or 2 inferior)
I: dorsal rami
A: elevate ribs, lateral bending of spine

23
Q

Rectus Capitis Posterior Major (/)

A

O: spinous process C2
I: inferior to inferior nuchael line
I: dorsal rami of C1
A: postural, rotate head to same side (unilaterally), extend head (bilaterally)

24
Q

Rectus Capitis Posterior Minor

A

O: posterior tubercle on posterior arch C1
I: inferior to inferior nuchael line
I: dorsal rami of C1
A: postural, rotate head to same side (unilaterally), extend head (bilaterally)

25
Q

Obliquus Capitis Inferior [_] (inferior oblique)

A

O: spinous process C2
I: transverse process C1
I: dorsal rami of C1
A: turn head to same side, lateral bend to same side

26
Q

Obliquus Capitis Superior (superior oblique) []

A

O: transverse process C1
I: between superior and inferior nuchael line
I: dorsal rami of C1
A: postural muscle, extend and laterally flex the head to the same side

27
Q

Triangle of Ascultation

A

Latissimus dorsi, rhomboid major, trapezius

28
Q

Suboccipital Triangle

A

Rectus Capitis Posterior Major, Inferior Oblique, Superior Oblique

anatomy (5 decks)

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