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gross exam 3 > muscles > Flashcards

muscles Flashcards

1
Q

rectus abdominus origin

A

lateral head: crest of pubis, pubic tubercle

Medial head: anterior region of pubic symphysis

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2
Q

rectus abdominus insertion

A

costal cartilage ribs 5-7

xiphoid process of sternum

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3
Q

rectus abdominus innervation

A

intercostal n T5-T12

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4
Q

rectus abdominus action

A

flexes trunk
compresses abdomen
stabilizes pelvis

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5
Q

anterolateral abdominal wall muscles

A

external and internal obliques

transversus abdominus

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6
Q

external oblique origin

A

ribs 5-12

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7
Q

external oblique insertion

A

linea alba
pubic tubercle
anterior iliac crest

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8
Q

external oblique innervation

A

intercostal n. T7-T12

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9
Q

external oblique action

A

unilateral- lateral trunk flexion
contralateral trunk rotation
bilateral- flex trunk, compress abdomen, stabilizes pelvis

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10
Q

internal obliques origin

A

deep thoracolumbar fascia, iliac crest, anterior superior iliac spine,
iliopsoas fascia

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11
Q

internal obliques insertion

A

10-12 ribs (lower border)

linea alba

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12
Q

internal obliques innervation

A

intercostal n. T7-T12
iliohypogastric n.
ilioinguinal n.

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13
Q

internal obliques action

A

unilateral- lateral trunk flexion, contralateral rotation

bilateral-trunk flexion, compress abdomen, stabilizes pelvis

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14
Q

transversus abdominus origin

A

costal cartilage ribs 7-12 (inner surfaces)
deep thoracolumbar fascia, iliac crest,
anterior iliac spine, iliopsoas fascia

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15
Q

transversus abdominus insertion

A

linea alba

pubic crest

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16
Q

transversus abdominus innervation

A

intercostal n. T7-T12
iliohypogastric n.
ilioinguinal n.

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17
Q

rectus abdominus action

A

unilateral- ipsilateral rotation

bilateral- compress abdomen

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18
Q

posterior abdominal wall muscles

A

psoas major and minor
illiacus
quadratus lumborum

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19
Q

psoas major origin

A

superficial- T12-L4 vertebral bodies, IV disks (lateral)

deep layer- L1-L5 costal processes

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20
Q

psoas major insertion

A

lesser trochanter of femur

joint insertion as iliopsoas muscle

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21
Q

psoas major innervation

A

lumbar plexus

L2-L4

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22
Q

psoas major action

A

flexion and external rotation of hip joint
lateral flex trunk
bilaterally flex trunk (sit up from supine)

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23
Q

psoas minor origin

A

T12-L1 vertebrae and IV disks (lateral)

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24
Q

psoas minor insertion

A

pectin pubis
iliopubic ramus
iliac fascia

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25
Q

Psoas minor innervation

A

lumbar plexus

L2-L4

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26
Q

psoas minor action

A

weak trunk flexor

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27
Q

iliacus

A

O: iliac fossa
I: (as iliopsoas muscle) (lesser trochanter of humerus)
Femoral n. L2-L4

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28
Q

quadratus lumborum origin

A

Iliac crest

iliolumbar ligament

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29
Q

quadratus lumborum innsertion

A

12th rib

L1-L4 TP

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30
Q

quadratus lumborum innervation

A

T12, L1-L4 spinal n.

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31
Q

quadratus lumborum action

A

unilateral- ipsilateral lateral flexion

bilateral- bearing down, expiration, stabilizes 12th rib

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32
Q

anterior abdominal wall muscles

A

rectus abdominus

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33
Q

external intercostals

A 
inferior border of rib to superior border of inferior rib 
fibers run anterioinferiorly 
*intercostal nerves 1-11
*inspiration
*stabilize chest wall
34
Q

internal intercostal

A 
inferior border of rib to superior border of inferior rib 
fibers run anterior and superior 
*intercostal nerves 1-11
*expiration
*stabilize chest wall
35
Q

transversus thoracis origin

A

sternum and xiphoid process

36
Q

transversus thoracis insertion

A

costal cartilage of ribs 2-6

37
Q

transversus thoracis innervation

A

intercostal nerves 2-6

38
Q

transversus thoracis action

A

weakly lowers ribs

expiration

39
Q

pelvic diaphragm

A

levator ani
coccygeus
pelvic fascia

40
Q

levator ani origin

A

body of pubis
tendinous arch
ischial spine

41
Q

levator ani insertion

A 
coccyx 
perineal body
anococcygeal ligament
prostate/vagina 
rectum
anal canal
42
Q

levator ani innervation

A

sacral plexus S4
inferior anal nerve
coccygeal plexus

43
Q

levator ani action

A

support pelvic viscera

44
Q

coccygeus origin

A

sacrum

45
Q

coccygeus insertion

A

ischial spine

46
Q

coccygeus innervation

A

sacral plexus S4-S5

47
Q

coccygeus action

A

support pelvic viscera

flex coccyx

48
Q

piriformis origin

A

sacrum

49
Q

piriformis insertion

A

greater trochanter of femur

50
Q

piriformis innervation

A

sacral plexus S1-S2

51
Q

piriformis action

A

external rotation and abduction of hip

52
Q

obturator internus origin

A

tendinous arch

bony surroundings

53
Q

obturator internus insertion

A

greater trochanter of femur

54
Q

obturator internus innervation

A

sacral plexus L5, S1

55
Q

obturator internus action

A

external rotation, abduction of hip joint

56
Q

superficial transverse perineal O/I

A

ischial ramus - perineal body

57
Q

superficial transverse perineal

innervation /action

A

pudendal n.
S2, S3, S4

  • closes urethra
  • holds pelvic organs in place
58
Q

external anal sphincter O/I

A

encircles anus from perineal body to anococcygeal ligament

59
Q

external anal sphincter action/ innervation

A

close anus

pudendal n S2-S4

60
Q

ischocavernosus O:I

A

O: ishial ramus
I:crus of clitoris/penis

61
Q

ischiocavernousus action/ innervation

A

pudendal n S2-S4

maintains erection

62
Q

bulbospongiosus

A

perineal body to clitoris/penis

  • pudendal n. S2-S4
  • compress vestibular gland/ assist in erection
63
Q

masseter O/I

A

o:zygomatic arch
I:mandibular angle

64
Q

masseter innervated / action

A 
mandibular n (CN V3)
-elevates and protrudes mandible
65
Q

Temporalis O/I

A

temporal fossa to coronoid process of mandible

66
Q

temporalis innervation/action

A 
mandibular n ( CN V3)
-elevate, retract, lateral move mandible
67
Q

lateral pterygoid superior head O/I

A

greater wing of sphenoid to TMJ articular disk

68
Q

lateral pterygoid inferior head O/I

A

lateral pterygoid plate to condylar process of mandible

69
Q

lateral pterygoid innervation/action

A

mandibular n. (CN V3)

-protrudes mandible

70
Q

medial pterygoid O/I

A

maxilla and lateral pterygoid plate to pterygoid tuberosity of mandibular angle

71
Q

medial pterygoid innervation/action

A 
mandibular n (CN V3)
-elevates mandible
72
Q

digastric anterior belly

A

mandible to hyoid bone

  • elevates hyoid bone
  • mylohyoid n (CN V3)
73
Q

digastric posterior belly

A

mastoid notch of temp bone to hyoid bone
elevates hyoid bone
facial n CN XI

74
Q

stylohyoid

A

styloid process temp bone to hyoid bone
facial n CN XI
elevates hyoid bone

75
Q

mylohyoid

A

mylohyoid line of mandible to hyoid bone
mylohyoid n CN V3
-mastication

76
Q

geniohyoid

A

inferior mental spine of mandible to hyoid bone

  • anterior ramus hypoglossal n (CN XII)
  • draws hyoid forward, opens mandible
77
Q

omohyoid

A

superior border of scap to hyoid bone

  • ansa cervicalis C1-C3
  • depress hyoid and larynx
78
Q

sternohyoid

A

manubrium and SC joint to hyoid bone

  • ansa cervicalis C1-C3
  • depress hyoid and larynx
79
Q

sternothyroid

A

manubrium to thyroid cartilage

  • ansa cervicalis C2,C3
  • depress hyoid and larynx
80
Q

thyrohoid

A

thyroid cartilage to hyoid bone
C1 hypoglossal n ( CN XII)
-depresses and fixes hyoid
-raises larynx

gross exam 3 (1 decks)

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