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Functional Anatomy I > Back/Abdominal Muscles > Flashcards

Back/Abdominal Muscles Flashcards

1
Q

Latissimus Dorsi - PA (origin)

A

SPs of T7 - T12, thoracolumbar fascia, posterior iliac crest, SPs of L1-L5, medial sacral crest

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2
Q

Latissimus Dorsi - DA (insertion)

A

Floor of bicipital groove of humerus

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3
Q

Latissimus Dorsi - Innervation

A

Thoracdorsal (C6, 7, 8)

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4
Q

Latissimus Dorsi - Actions

A

Extension, adduction, and medial rotation of the humerus; CC - depresses the shoulder complex

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5
Q

Spinalis Thoracis - PA (origin)

A

SPs of T11 - T12 and L1 - L2

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6
Q

Spinalis Thoracis - DA (insertion)

A

SPs of T1 - T4

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7
Q

Spinalis Thoracis - Innervation

A

Dorsal rami of thoracic spinal nerves

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8
Q

Spinalis Thoracis - Actions

A

Bilateral trunk extension, weak ipsilateral side bending

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9
Q

Longissimus Thoracis - PA (origin)

A

Via the common tendon, thoracolumbar fascia, posterior surface of lumbar TPs and sacrum

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10
Q

Longissimus Thoracis - DA (insertion)

A

TPs of all thoracic vertebra, lower 8-9 ribs

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11
Q

Longissimus Thoracis - Innervation

A

Dorsal rami of lumbar and thoracic spinal nerves

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12
Q

Longissimus Thoracis - Actions

A

Bilateral trunk extension, ipsilateral side bending

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13
Q

Iliocostalis Thoracis - PA (origin)

A

Lower 6 ribs at angles

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14
Q

Iliocostalis Thoracis - DA (insertion)

A

Angles of upper 6 ribs

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15
Q

Iliocostalis Thoracis - Innervation

A

Dorsal rami of thoracic and lumber spine

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16
Q

Iliocostalis Thoracis - Actions

A

Bilateral trunk extension, ipsilateral side bending

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17
Q

Multifidus - PA (origin)

A

TPs of lumbar through lower cervical vertebrae, sacrum, PSIS, dorsal SI ligaments

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18
Q

Multifidus - DA (insertion)

A

SPs of the more superiorly located vertebra

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19
Q

Multifidus - Innervation

A

Dorsal rami of corresponding level

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20
Q

Multifidus - Actions

A

Trunk extension, ipsilateral side bending, stabilization of SI joints and lumbar joints

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21
Q

Rotatores - PA (origin)

A

TPs of thoracic spine T1 - T12

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22
Q

Rotatores - DA (insertion)

A

Lamina of the next superior vertebra

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23
Q

Rotatores - Innervation

A

Dorsal rami of corresponding level

24
Q

Rotatores - Actions

A

Trunk contralateral rotation, bilateral extension

25
Q

Diaphragm - Attachments

A

Sternal potion - posterior surface of xiphoid process; Costal portion - inner surfaces of ribs 6 - 12; Lumber portion - anterior surface of L1 - L3

26
Q

Diaphragm - Innervation

A

Motor innervation - phrenic nerve C3 - C5; sensory innervation - IC nerves T7 - T12

27
Q

Diaphragm - Actions

A

Primary muscle of respiration. descends during inhalation, ascends during exhalation

28
Q

External Intercostals - Attachments

A

Extend from the inferior edge of the superior rib to the superior surface of the rib below

29
Q

External Intercostals - Innervation

A

Intercostals

30
Q

External Intercostals - Actions

A

Respiration; most active during inspiration

31
Q

Internal Intercostals - Attachments

A

Pass between the most inferior lateral edge of costal grooves of ribs above, to superior surface of ribs below

32
Q

Internal Intercostals - Innervation

A

Intercostals

33
Q

Internal Intercostals - Actions

A

Respiration; primarily thought to be active in forced expiration

34
Q

Innermost Intercostals - Attachments

A

Attached to the internal surfaces of adjacent ribs along the medial edge of the costal grooves

35
Q

Innermost Intercostals - Innervation

A

Intercotals

36
Q

Innermost Intercostals - Actions

A

Respiration

37
Q

Rectus Abdominus - PA (origin)

A

Pubic crest, pubic symphysis and pubic ligaments

38
Q

Rectus Abdominus - DA (insertion)

A

Xiphoid process, costal cartilage of ribs 5-7

39
Q

Rectus Abdominus - Innervation

A

Ventral rami T6-T12

40
Q

Rectus Abdominus - Actions

A

Bilaterally flexes the trunk, compresses abdominal viscera, posterior pelvic tilt

41
Q

External Obliques - PA (origin)

A

Lower 8 ribs (ribs 5-12) on exterior and inferior surfaces

42
Q

External Obliques - DA (insertion)

A

Anterior 1/2 iliac crest, ASIS, abdominal aponeurosis to linea albla

43
Q

External Obliques - Innervation

A

Ventral rami T7-T12

44
Q

External Obliques - Actions

A

Bilaterally flexes the trunk, compresses abdominal viscera and posterior pelvic tilt; unilaterally side bends trunk and contralaterally rotates the trunk

45
Q

Internal Obliques - PA (origin)

A

Lateral 2/3 of lingual ligament, anterior iliac crest, thoracolumbar fascia

46
Q

Internal Obliques - DA (insertion)

A

Lower 3-4 ribs and their costal cartilage, aponeurosis to mideline linea alba and pubic crest

47
Q

Internal Obliques - Innervation

A

Ventral rami T7 - T12

48
Q

Internal Obliques - Actions

A

Bilaterally flexes trunk, compresses abdominal viscera, ipsilateral side bends and rotation of trunk; CC- posteriorly tilts pelvis

49
Q

Transversus abdominus - PA (origin)

A

Lateral 1/3 inguinal ligament, anterior iliac crest, thoracolumbar fascia between 12th rib and iliac crest, lower 6 costal cartilages

50
Q

Transversus abdominus - DA (insertion)

A

Aponeurosis to linea alba and pubic crest

51
Q

Transversus abdominus - Innervation

A

Ventral rami T7 - T12

52
Q

Transversus abdominus - Actions

A

Compression of abdominal viscera, lumbar stabilizaiton

53
Q

Quadratus Lumborum - PA (origin)

A

Posteromedial iliac crest, iliolumbar ligament

54
Q

Quadratus Lumborum - DA (insertion)

A

12th rib along medial 1/2 of lower border, TPs of T12 - L4

55
Q

Quadratus Lumborum - Innervation

A

Verntal rami T12 - L3

56
Q

Quadratus Lumborum - Actions

A

Stabilizes 12th rib and lumbar spine, ipsilateral side bends, bilateral extension, hikes hip

Functional Anatomy I (3 decks)

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