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gross exam 3 > muscles > Flashcards

muscles Flashcards

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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
Psoas minor innervation
lumbar plexus | L2-L4
26
psoas minor action
weak trunk flexor
27
iliacus
O: iliac fossa I: (as iliopsoas muscle) (lesser trochanter of humerus) Femoral n. L2-L4
28
quadratus lumborum origin
Iliac crest | iliolumbar ligament
29
quadratus lumborum innsertion
12th rib | L1-L4 TP
30
quadratus lumborum innervation
T12, L1-L4 spinal n.
31
quadratus lumborum action
unilateral- ipsilateral lateral flexion | bilateral- bearing down, expiration, stabilizes 12th rib
32
anterior abdominal wall muscles
rectus abdominus
33
external intercostals
``` inferior border of rib to superior border of inferior rib fibers run anterioinferiorly *intercostal nerves 1-11 *inspiration *stabilize chest wall ```
34
internal intercostal
``` inferior border of rib to superior border of inferior rib fibers run anterior and superior *intercostal nerves 1-11 *expiration *stabilize chest wall ```
35
transversus thoracis origin
sternum and xiphoid process
36
transversus thoracis insertion
costal cartilage of ribs 2-6
37
transversus thoracis innervation
intercostal nerves 2-6
38
transversus thoracis action
weakly lowers ribs | expiration
39
pelvic diaphragm
levator ani coccygeus pelvic fascia
40
levator ani origin
body of pubis tendinous arch ischial spine
41
levator ani insertion
``` coccyx perineal body anococcygeal ligament prostate/vagina rectum anal canal ```
42
levator ani innervation
sacral plexus S4 inferior anal nerve coccygeal plexus
43
levator ani action
support pelvic viscera
44
coccygeus origin
sacrum
45
coccygeus insertion
ischial spine
46
coccygeus innervation
sacral plexus S4-S5
47
coccygeus action
support pelvic viscera | flex coccyx
48
piriformis origin
sacrum
49
piriformis insertion
greater trochanter of femur
50
piriformis innervation
sacral plexus S1-S2
51
piriformis action
external rotation and abduction of hip
52
obturator internus origin
tendinous arch | bony surroundings
53
obturator internus insertion
greater trochanter of femur
54
obturator internus innervation
sacral plexus L5, S1
55
obturator internus action
external rotation, abduction of hip joint
56
superficial transverse perineal O/I
ischial ramus - perineal body
57
superficial transverse perineal | innervation /action
pudendal n. S2, S3, S4 - closes urethra - holds pelvic organs in place
58
external anal sphincter O/I
encircles anus from perineal body to anococcygeal ligament
59
external anal sphincter action/ innervation
close anus | pudendal n S2-S4
60
ischocavernosus O:I
O: ishial ramus I:crus of clitoris/penis
61
ischiocavernousus action/ innervation
pudendal n S2-S4 | maintains erection
62
bulbospongiosus
perineal body to clitoris/penis - pudendal n. S2-S4 - compress vestibular gland/ assist in erection
63
masseter O/I
o:zygomatic arch I:mandibular angle
64
masseter innervated / action
``` mandibular n (CN V3) -elevates and protrudes mandible ```
65
Temporalis O/I
temporal fossa to coronoid process of mandible
66
temporalis innervation/action
``` mandibular n ( CN V3) -elevate, retract, lateral move mandible ```
67
lateral pterygoid superior head O/I
greater wing of sphenoid to TMJ articular disk
68
lateral pterygoid inferior head O/I
lateral pterygoid plate to condylar process of mandible
69
lateral pterygoid innervation/action
mandibular n. (CN V3) | -protrudes mandible
70
medial pterygoid O/I
maxilla and lateral pterygoid plate to pterygoid tuberosity of mandibular angle
71
medial pterygoid innervation/action
``` mandibular n (CN V3) -elevates mandible ```
72
digastric anterior belly
mandible to hyoid bone - elevates hyoid bone - mylohyoid n (CN V3)
73
digastric posterior belly
mastoid notch of temp bone to hyoid bone elevates hyoid bone facial n CN XI
74
stylohyoid
styloid process temp bone to hyoid bone facial n CN XI elevates hyoid bone
75
mylohyoid
mylohyoid line of mandible to hyoid bone mylohyoid n CN V3 -mastication
76
geniohyoid
inferior mental spine of mandible to hyoid bone - anterior ramus hypoglossal n (CN XII) - draws hyoid forward, opens mandible
77
omohyoid
superior border of scap to hyoid bone - ansa cervicalis C1-C3 - depress hyoid and larynx
78
sternohyoid
manubrium and SC joint to hyoid bone - ansa cervicalis C1-C3 - depress hyoid and larynx
79
sternothyroid
manubrium to thyroid cartilage - ansa cervicalis C2,C3 - depress hyoid and larynx
80
thyrohoid
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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