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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
Diaphragm - Attachments
Sternal potion - posterior surface of xiphoid process; Costal portion - inner surfaces of ribs 6 - 12; Lumber portion - anterior surface of L1 - L3
26
Diaphragm - Innervation
Motor innervation - phrenic nerve C3 - C5; sensory innervation - IC nerves T7 - T12
27
Diaphragm - Actions
Primary muscle of respiration. descends during inhalation, ascends during exhalation
28
External Intercostals - Attachments
Extend from the inferior edge of the superior rib to the superior surface of the rib below
29
External Intercostals - Innervation
Intercostals
30
External Intercostals - Actions
Respiration; most active during inspiration
31
Internal Intercostals - Attachments
Pass between the most inferior lateral edge of costal grooves of ribs above, to superior surface of ribs below
32
Internal Intercostals - Innervation
Intercostals
33
Internal Intercostals - Actions
Respiration; primarily thought to be active in forced expiration
34
Innermost Intercostals - Attachments
Attached to the internal surfaces of adjacent ribs along the medial edge of the costal grooves
35
Innermost Intercostals - Innervation
Intercotals
36
Innermost Intercostals - Actions
Respiration
37
Rectus Abdominus - PA (origin)
Pubic crest, pubic symphysis and pubic ligaments
38
Rectus Abdominus - DA (insertion)
Xiphoid process, costal cartilage of ribs 5-7
39
Rectus Abdominus - Innervation
Ventral rami T6-T12
40
Rectus Abdominus - Actions
Bilaterally flexes the trunk, compresses abdominal viscera, posterior pelvic tilt
41
External Obliques - PA (origin)
Lower 8 ribs (ribs 5-12) on exterior and inferior surfaces
42
External Obliques - DA (insertion)
Anterior 1/2 iliac crest, ASIS, abdominal aponeurosis to linea albla
43
External Obliques - Innervation
Ventral rami T7-T12
44
External Obliques - Actions
Bilaterally flexes the trunk, compresses abdominal viscera and posterior pelvic tilt; unilaterally side bends trunk and contralaterally rotates the trunk
45
Internal Obliques - PA (origin)
Lateral 2/3 of lingual ligament, anterior iliac crest, thoracolumbar fascia
46
Internal Obliques - DA (insertion)
Lower 3-4 ribs and their costal cartilage, aponeurosis to mideline linea alba and pubic crest
47
Internal Obliques - Innervation
Ventral rami T7 - T12
48
Internal Obliques - Actions
Bilaterally flexes trunk, compresses abdominal viscera, ipsilateral side bends and rotation of trunk; CC- posteriorly tilts pelvis
49
Transversus abdominus - PA (origin)
Lateral 1/3 inguinal ligament, anterior iliac crest, thoracolumbar fascia between 12th rib and iliac crest, lower 6 costal cartilages
50
Transversus abdominus - DA (insertion)
Aponeurosis to linea alba and pubic crest
51
Transversus abdominus - Innervation
Ventral rami T7 - T12
52
Transversus abdominus - Actions
Compression of abdominal viscera, lumbar stabilizaiton
53
Quadratus Lumborum - PA (origin)
Posteromedial iliac crest, iliolumbar ligament
54
Quadratus Lumborum - DA (insertion)
12th rib along medial 1/2 of lower border, TPs of T12 - L4
55
Quadratus Lumborum - Innervation
Verntal rami T12 - L3
56
Quadratus Lumborum - Actions
Stabilizes 12th rib and lumbar spine, ipsilateral side bends, bilateral extension, hikes hip

Functional Anatomy I (3 decks)

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