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Anatomy Exam 2 > Muscles > Flashcards

Muscles Flashcards

1
Q

External intercostal

Location

A

within intercostal spaces from tubercles of ribs to costochondral joints

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2
Q

External intercostal

attachments

A

inferior border of the rib above and superior border of the rib below

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3
Q

External intercostal

action

A

aid in inspiration (elevate the ribs, increase thoracic volume)

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4
Q

Internal intercostal

location

A

within intercostal spaces from angles of ribs to sternum

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5
Q

Internal intercostal

attachments

A

inferior border of the rib above and superior border of rib below

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6
Q

Internal intercostal

action

A

interosseus: aid in expiration (depress ribs, decrease thoracic volume)
interchondral: aid in inspiration (elevate ribs, increase thoracic volume)

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7
Q

Internal intercostal

innervation

A

Intercostal nerves (T1-T11)

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8
Q

External intercostal

innervation

A

Intercostal nerves (T1-T11)

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9
Q

Innermost intercostal

location

A

within lateral intercostal spaces

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10
Q

Innermost intercostal

attachments

A

inferior border of rib above and superior border of rib below

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11
Q

Innermost intercostal

action

A

aid in expiration (depress ribs; decrease thoracic volume)

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12
Q

Innermost intercostal

innervation

A

intercostal nerves (T1-T11)

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13
Q

Transversus thoracis

location

A

internal surface of anterior thoracic wall

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14
Q

Transversus thoracis

attachments

A

posterior surface of sternum and posterior surface of costal cartilages

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15
Q

Transversus thoracis

action

A

depress ribs (aid in expiration)

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16
Q

Transversus thoracis

innervation

A

intercostal nerves (T1-T11)

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17
Q

Subcostal

location

A

internal surface of posterior thoracic wall

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18
Q

Subcostal

attachments

A

inferior border of the ribs near angles and superior border of 2nd or 3rd rib inferior

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19
Q

Subcostal

action

A

depress ribs (expiration)

20
Q

Subcostal

innervation

A

Intercostal nerves (T1-T11)

21
Q

Diaphragm

location

A

divides thoracic and abdominopelvic cavities

22
Q

Diaphragm

attachments

A

central tendon; posterior surface of xiphoid process; inferior ribs and their costal cartilages; anterior surface of vertebral bodies L1-L3

23
Q

Diaphragm

innervation

A

Phrenic nerves (C3-C5)

24
Q

Diaphragm

action

A

contraction during inspiration, forced contraction during defecation, urination, and childbirth

25
Q

External oblique

attachments

A

lower ribs, linea alba, pubic crest, iliac crest

26
Q

External oblique

action

A

compress abdomen; flex and rotate trunk

27
Q

External oblique

innervation

A

lower intercostal nerves (T6-T11) and subcostal nerve (T12)

28
Q

Internal oblique

attachment

A

thoracolumbar fascia, iliac crest, inguinal ligament, pubic bone, lower ribs, linea alba

29
Q

Internal oblique

action

A

compress abdomen; flex and rotate trunk

30
Q

Internal oblique

innervation

A

Lower intercostal nerves (T6-T11) subcostal nerve (T12), anterior rami of L1

31
Q

Transverse abdominis

attachment

A

lower costal cartilages, thoracolumbar fascia, iliac crest, inguinal ligament, linea alba, public bone

32
Q

Transverse abdominis

action

A

compress abdomen

33
Q

Transverse abdominis

innervation

A

Lower intercostal nerves (T6-T11) subcostal nerve (T12), anterior rami of L1

34
Q

Rectus abdominis

attachment

A

pubic symphysis, pubic bone, xiphoid process, lower costal cartilages

35
Q

Rectus abdominis

action

A

compress abdomen, flex turnk

36
Q

Rectus abdominis

innervation

A

Lower intercostal nerves (T6-T11) and subcostal nerve (T12)

37
Q

Psoas major

attachments

A

Transverse processes and bodies of lumbar vertebrae, lumbar intervertebral discs, and lesser trochanter of femur

38
Q

Psoas major

action

A

flex thigh, laterally flex vertebral column, flex vertebral column

39
Q

Psoas major

innervation

A

Anterior rami of L1-L3

40
Q

Iliacus

attachments

A

iliac fossa, ala of sacrum, lesser trochanter of femur

41
Q

Iliacus

action

A

flexes thigh

42
Q

Iliacus

innervation

A

Femoral nerve (L2-L4)

43
Q

Quadratus lumborum

attachments

A

transverse processes of lumbar vertebrae, inferior border of rib 12, iliac crest

44
Q

Quadratus lumborum

action

A

extend vertebral column, laterally flex vertebral column, stabilizes 12th rib during inspiration

45
Q

Quadratus lumborum

innervation

A

Anterior rami of T12-L4

Anatomy Exam 2 (7 decks)

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