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S1 Anatomy > Glute and Thigh Muscles > Flashcards

Glute and Thigh Muscles Flashcards

1
Q

tensor fascia latae

-origin

A

anterior part of iliac crest
iliac tubercle
ASIS
deep surface of fascia lata

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2
Q

tensor fascia latae

-insertion

A

iliobitial tract of fascia lata

-attaches to lateral condyle of tibia

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3
Q

tensor fascia latae

-actions

A 
thigh
-flexion
-medial rotation (internal)
-abduction
tenses fascia lata
may assist in knee extension
steadies trunk on thigh
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4
Q

tensor fascia latae

-innervation

A

superior gluteal nerve

-dorsal divisional of L4, L5, S1

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5
Q

gluteus maximus

-origin

A 
external surface
-ala of ilium - posterior to posterior gluteal line
-iliac crest
dorsal surface of sacrum
coccyx
sacrotuberous ligament
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6
Q

gluteus maximus

-insertion

A 
iliotibial tract (which inserts in lateral condyle of tibia)
gluteal tuberosity of femur
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7
Q

gluteus maximus

-actions

A 
thigh
-extension (more in forced movements such as climbing and running)
lateral rotation
steadies thigh flexion (during sitting)
extends pelvis when thigh fixed
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8
Q

gluteus maximus

-innervation

A

inferior gluteal nerve

-dorsal divisions of L5, S1, S2

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9
Q

gluteus medius

-origin

A

external surface of ilium

-between anterior and posterior gluteal lines

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10
Q

gluteus medius

-insertion

A

lateral surface of greater trochanter of femur

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11
Q

gluteus medius

-actions

A

abduction of thigh
medial rotation of thigh (anterior fibers)
lateral rotation of thigh (posterior fibers)
steadies pelvis (tilts) to same side during locomotion, allowing opposite side foot to clear ground
-fixing of femur and abduction tilts the pelvis

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12
Q

gluteus medius

-innervation

A

superior gluteal nerve

-dorsal divisions of L4, L5, S1

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13
Q

gluteus minimus

-origin

A

external surface of ilium

-between anterior and inferior gluteal lines

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14
Q

gluteus minimus

-insertion

A

anterior surface of greater trochanter of femur

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15
Q

gluteus minimus

-actions

A

abduction of thigh
medial rotation of thigh
steadies pelvis (same as G. medius)

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16
Q

gluteus minimus

-innervation

A

superior gluteal nerve

-dorsal divisions of L4, L5, S1

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17
Q

piriformis

-origin

A

anterior surface of sacrum (within the pelvis)
superior margin of greater sciatic notch
sacrotuberous ligament

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18
Q

piriformis

-insertion

A

superior border of the greater trochanter

-leaves pelvis minor through greater sciatic foramen

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19
Q

piriformis

-actions

A

rotates thigh (extended) laterally
abducts (flexed) thigh
assist in holding the head of the femur in the acetabulum

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20
Q

piriformis

-innervation

A

dorsal division branches of ventral rami of S1 and S2

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21
Q

obturator internus

-origin

A

pelvic surfaces of ilium and ischium

internal surface of obturator membrane

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22
Q

obturator internus

-insertion

A

medial surface of greater trochanter of femur

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23
Q

obturator internus

-actions

A

laterally rotates extended thigh
abducts flexed thigh
assists in holding head of femur in acetabulum

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24
Q

obturator internus

-innnervation

A

nerve to obturator internus (ventral divisions of L5, S1

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25
obturator externus | -origin
rami of pubis and ischium | external surface of obturator membrane
26
obturator externus | -insertion
trochanteric fossa of femur
27
obturator externus | -actions
laterally rotates extended thigh | steadies head of femur in acetabulum
28
obturator externus | -innervation
obturator nerve (L3, L4)
29
gemellus superior, inferior | -origin
superior -ischial spine inferior -ischial tuberosity
30
gemellus superior, inferior | -insertion
medial surface of greater trochanter | -common tendon with obturator internus
31
gemellus superior, inferior | -actions
same as obturator internus -laterally rotates extended thigh abducts flexed thigh assists in holding head of femur in acetabulum
32
gemellus superior, inferior | -innervation
superior -nerve to obturator internus (ventral divisions of L5, S1) inferior -nerve to quadratus femoris (ventral divisions of L5, S1)
33
quadratus femoris | -origin
lateral border of ischial tuberosity | -inferior to gemellus inferior
34
quadratus femoris | -insertion
on and inferior to quadrate tubercle on intertrochanteric crest
35
quadratus femoris | -actions
laterally rotates thigh | steadies femoral head in acetabulum
36
quadratus femoris | -innervation
nerve to quadratus femoris (ventral divisions of L5, S1)
37
iliopsoas (psoas major, iliacus) | -origin
p. major -transverse process of lumbar vertebrae, sides of bodies of T12-L5 (including discs) iliacus -superior 2/3 of iliac fossa -ala of sacrum -anterior sacroiliac ligament
38
iliopsoas (psoas major, iliacus) | -insertion
p. major -strong tendon into lesser trochanter iliacus -tendon of psoas -lesser trochanter -shaft of femur inferior to lesser trochanter
39
iliopsoas (psoas major, iliacus) | -actions
with vertebral column fixed (acting superiorly) -both flex thigh with thigh fixed (acting inferiorly) -lateral flexion of vertebral column acting inferiorly with other side and iliacus -flexes trunk balances trunk when sitting
40
iliopsoas (psoas major, iliacus) | -innervation
p. major -lumbar plexus (ventral rami L1-3(4) iliacus -femoral nerve L2-L4
41
sartorius | -origin
ASIS | superior part of notch inferior
42
sartorius | -insertion
superior part of medial surface of tibia
43
sartorius | -actions
``` thigh -flexion -abduction -lateral rotation knee -flexion ```
44
sartorius | -innervation
femoral nerve L2-L4
45
``` Quadriceps femoris (rectus femoris; vastus lateralis, intermedius & medialis) -origin ```
``` R. femoris -AIIS -groove superior to acetabulum V. lateralis -greater trochanter -lateral lip of linea aspera V. intermedius -anterior and lateral surfaces of body of femur V. medialis -intertrochanteric line -medial lip of linea aspera -spiral lines ```
46
``` Quadriceps femoris (rectus femoris; vastus lateralis, intermedius & medialis) -insertion ```
base of patella | via patellar ligament to tibial tuberosity
47
``` Quadriceps femoris (rectus femoris; vastus lateralis, intermedius & medialis) -actions ```
extends leg at knee R. femoris -steadies hip joint -helps iliopsoas flex thigh
48
``` Quadriceps femoris (rectus femoris; vastus lateralis, intermedius & medialis) -innervation ```
femoral nerve L2-4
49
pectineus | -origin
pectineal line of the pubis
50
pectineus | -inseriton
pectineal line of femur
51
pectineus | -actions
thigh adduction at hip | thigh flexion at hip
52
pectineus | -innervation
femoral nerve L2-4 | may also receive obturator nerve L2-4
53
adductor longus | -origin
body of pubis inferior to pubic crest
54
adductor longus | -insertion
middle 1/3 of linea aspera
55
adductor longus | -actions
adducts thigh
56
adductor longus | -innervation
obturator nerve L2-4
57
adductor brevis | -origin
body and inferior ramus of pubic bone
58
adductor brevis | -insertion
pectineal line of femur | proximal part of linea aspera
59
adductor brevis | -actions
thigh adduction | thigh flexion
60
adductor brevis | -innervation
obturator nerve L2-4
61
adductor magnus | -origin
``` adductor part -inferior ramus of pubic bone -ramus of ischium hamstring part -ischial tuberosity ```
62
adductor magnus | -insertion
``` adductor part -gluteal tuberosity -linea aspera -medial supracondylar line hamstring part -adductor tubercle of femur ```
63
adductor magnus | -actions
``` adductor part -adducts thigh -flexes thigh hamstring part -extends thigh -adducts thigh ```
64
adductor magnus | -innervation
adductor part -obturator nerve L2-L4 hamstring part -tibial portion of sciatic nerve L4 (L5-S1)
65
gracilis | -origin
body and inferior ramus of pubic bone
66
gracilis | -insertion
superior part of medial surface of tibia
67
gracilis | -actions
thigh adduction flexes leg medial rotation of leg
68
gracilis | -innervation
obturator nerve L2-4
69
semitendinosus | -origin
ischial tuberosity
70
semitendinosus | -insertion
medial surface of superior part of tibia
71
semitendinosus | -action
``` thigh extension leg flexion leg medial rotation when thigh and leg fixes -can extend trunk ```
72
semitendinosus | -innervation
tibial division of sciatic nerve L5-S2
73
Semimembranosus | -origin
common origin on ischial tuberosity with semitendinosus and long head of biceps femoris
74
Semimembranosus | -insertion
posterior part of medial condyle of tibia | oblique popliteal ligament
75
Semimembranosus | -actions
same as semitendinosus - thigh extension - leg flexion - leg medial rotation - can extend truck when thigh and leg fixed
76
Semimembranosus | -innervation
tibial division of sciatic nerve L5-S2
77
``` biceps femoris (long head, short head) -origin ```
long head -ischial tuberosity short head -lateral lip of linea aspera and lateral supracondylar line
78
``` biceps femoris (long head, short head) -insertion ```
lateral side of head of fibula | tendon is split by lateral collateral ligament
79
``` biceps femoris (long head, short head) -action ```
leg flexion leg lateral rotation extends thigh at beginning of walking
80
``` biceps femoris (long head, short head) -innervation ```
long head -tibial division of sciatic nerve L5-S2 short head -common peroneal division of sciatic nerve L5-S2
81
superior gluteal nerve - nerve roots - muscles innervated
``` roots -L4, L5, S1 dorsal divisions muslces -TFL -gluteus medius -gluteus minimus ```
82
inferior gluteal nerve - nerve roots - muscles innervated
roots -L5, S1, S2 dorsal divisions muscles -gluteus maximus
83
femoral nerve - nerve roots - muscles innervated
``` roots -L2-4 dorsal divisions muscles -iliacus -sartorius -quadriceps femoris -pectineus ```
84
obturator nerve - nerve roots - muscles innervated
``` roots -L2-4 ventral divisions muscles -pectineus (possibly) -all three adductor muscles (except hamstring part of magnus) -gracilis ```
85
tibial division of sciatic nerve - nerve roots - muscles innervated
``` roots -L5-S2 ventral divisions muscles -semi T -semi M -biceps femoris long head ```
86
common peroneal division of sciatic nerve - nerve roots - muscles innervated
roots -L5-S2 dorsal divisions muscles -biceps femoris short head
87
which muscles have their own innervation? | what are the innervations?
``` piriformis -S1, S2 dorsal divisions obt. int. and gem. sup. -L5, S1 ventral divisions (nerve to obt. int.) quad. fem. and gem. inf. -L5, S1 ventral divisions (nerve to quad. fem.) obturator externus -L3, L4 (obturator nerve) psoas major -L1-3(4) ventral rami ```

S1 Anatomy (31 decks)

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