Lower Extremity (Muscles) Flashcards
1
Q
What Muscles make up Iliopsoas M? (Chief Flexor of Thigh)
A
Iliacus and Psoas Major/Minor
2
Q
What is the Origin/Insertion of Iliacus?
A
O: Superior Iliac Fossa, Ala of Sacrum, and Ant. Sacroiliac L.
I: Lesser Trochanter
3
Q
What is the Innervation of Iliacus?
A
Femoral N. (L2-L3)
4
Q
What is the Blood Supply of Iliacus?
A
Medial Femoral Circumflex A. and Iliolumbar A.
5
Q
What is the Action of Iliacus?
A
Flexes Thigh / Stabilizes Hip Joint
6
Q
What is the Origin/Insertion of Psoas Major?
A
T12-15 Vert. / Lesser Trochanter of Femur
7
Q
What is the Innervation of Psoas Major?
A
Ant. Rami of L1 - L3
8
Q
What is the Blood Supply of Psoas Major?
A
Iliolumbar A.
9
Q
What is the Action of Psoas Major?
A
Flexes Thigh / Laterally flex VC / Flex Trunk
10
Q
What is the Origin/Insertion of Sartorius?
A
ASIS / Pes Anserinus
11
Q
What is the Innervation of Sartorius?
A
Femoral N. (L2-L3)
12
Q
What is the Blood Supply of Sartorius?
A
Femoral A.
13
Q
What is the Action of Sartorius?
A
Flex/ Abduct/ laterally rotate thigh (Flex Leg at Knee)
14
Q
What 4 Muscles make up the Quadriceps Femoris M.?
What do they do?
What do they form at the end?
A
Rectus Femoris m. / Vastus Lateralis m. / Vastus Medialis m. / Vastus Intermedius m.
Primary Leg EXTENDERS!
all 4 muscles give off a tendon that forms the Quadriceps Tendon
15
Q
What is the Origin/Insertion of Rectus Femoris?
A
ASIS / Tibial Tuberosity
16
Q
What is the Innervation of Rectus Femoris?
A
Femoral N. (L2-L3)
17
Q
What is the Blood Supply of Rectus Femoris?
A
Lateral Femoral Circumflex A.
18
Q
What is the Action of Rectus Femoris?
A
Extend Leg / Flexes Thigh
19
Q
What is the Origin/Insertion of Vastus Lateralis?
A
Shaft of Femur / Tibial Tuberosity
20
Q
What is the Innervation of Vastus Lateralis?
A
Femoral N. (L2-L3)
21
Q
What is the Blood Supply of Vastus Lateralis?
A
Femoral A.
22
Q
What is the Action of Vastus Lateralis?
A
Extend Leg (at knee)
23
Q
What is the Origin/Insertion of Vastus Medialis?
A
Shaft of Femur / Tibial Tuberosity
24
Q
What is the Innervation of Vastus Medialis?
A
Femoral N. (L2-L3)
25
What is the Blood Supply of Vastus Medialis?
Femoral A.
26
What is the Action of Vastus Medialis?
Extend Leg (at knee)
27
What is the Origin/Insertion of Vastus Intermedius?
Shaft of Femur / Tibial Tuberosity
28
What is the Innervation of Vastus Intermedius?
Femoral N. (L2-L3)
29
What is the Blood Supply of Vastus Intermedius?
Femoral A.
30
What is the Action of Vastus Intermedius?
Extend Leg (at Knee)
31
What is the Origin/Insertion of Pectineus?
Pecten Line of Pubis / Pectineal Line (inf. to Lesser Trochanter)
32
What is the Innervation of Pectineus?
Femoral N (L2-L3) ( and occasionally Obturator N) (L2-L4)
33
What is the Blood Supply of Pectineus?
Obturator A.
34
What is the Action of Pectineus?
Adduct and Flex Thigh
35
What is the Origin/Insertion of Adductor Longus m.?
Body of Pubis (inf. to Pubic Crest) / Middle 1/3 of Linea Aspera
36
What is the Innervation of Adductor Longus m.?
Obturator N (L2-L4)
37
What is the Blood Supply of Adductor Longus m.?
Deep Femoral A.
38
What is the Action of Adductor Longus m.?
Adduct and Flex Thigh
39
What is the Origin/Insertion of Adductor Brevis m.?
Pubis Body & Inferior Ramus / Proximal Linea Aspera
40
What is the Innervation of Adductor Brevis m.?
Obturator N. (L2 - L4)
41
What is the Blood Supply of Adductor Brevis m.?
Deep Femoral A.
42
What is the Action of Adductor Brevis m.?
Adduct / Flex Thigh
43
What is the Origin/Insertion of Adductor Magnus M.?
Adductor Part = Ischial Tuberosity / Gluteal Tuberosity - Linea Aspera - Medial Supracondylar Line
Hamstring Part = Ischiopubic Ramus / Medial Epicondyle
44
What is the Innervation of Adductor Magnus m.?
Adductor Part = Obturator N. (L2 - L4)
| Hamstring Part = Tibial Part of Sciatic N. (L4)
45
What is the Blood Supply of Adductor Magnus m.?.?
both - Deep Femoral A.
46
What is the Action of Adductor Magnus m.?
Adductor Part = Adduct and Flex Thigh
| Hamstring Part = Adduct and Extend Thigh
47
What is the Origin/Insertion of Gracilis m.?
Inferior Ramus of Pubis / Superior Part of Medial Tibial Surface
48
What is the Innervation of Gracilis m.?
Obturator N. (L2-L4)
49
What is the Blood Supply of Gracilis m?
Medial Circumflex Femoral A.
50
What is the Action of Gracilis m.?
Adduct Thigh / Flexes & Medially Rotate Leg
51
What is the Origin/Insertion of Obturator Externus m.?
External Margins of Obturator Foramen / Trochanteric Fossa
52
What is the Innervation of Obturator Externus m.?
Obturator N. (L2-L4)
53
What is the Blood Supply of Obturator Externus m.?
Obturator A.
54
What is the Action of Obturator Externus m.?
Laterally Rotate Thigh (Stabilizes Femoral Head)
55
What is the Origin/Insertion of Gluteus Maximus m.?
Ilium Posterior to posterior Gluteal Line, Dorsal sacrum and Coccyx, Sacrotuberous L.
Gluteal Tuberosity , Lateral Tibial Condyle (via Iliotibial Tract)
56
What is the Innervation of Gluteus Maximus m.?
Inferior Gluteal N. (L5, S1, S2)
57
What is the Blood Supply of Gluteus Maximus m.?
Inferior Gluteal A.
58
What is the Action of Gluteus Maximus m.?
Extends Thigh, assists in Lateral Rot.
59
What is the Origin/Insertion of Gluteus Medius m.?
Ilium Between Anterior and Posterior Gluteal Lines /
| Lateral aspect Greater Trochanter of Femur
60
What is the Innervation of Gluteus Medius m.?
Superior Gluteal N. (L4 - S1)
61
What is the Blood Supply of Gluteus Medius m.?
Superior Gluteal A.
62
What is the Action of Gluteus Medius m.?
Abduct and Medially Rotate Thigh
63
What is the Origin/Insertion of Gluteus Minimus m.?
Ilium Between Anterior and Posterior Gluteal Lines
| Anterior aspect Greater Trochanter of Femur
64
What is the Innervation of Gluteus Minimus m.?
Superior Gluteal N (L4-S1)
65
What is the Blood Supply of Gluteus Minimus m.?
Superior Gluteal A.
66
What is the Action of Gluteus Minimus m.?
Abduct and Medially Rotate Thigh
67
What is the Origin/Insertion of Tensor Fascia Lata m.?
ASIS, Anterior aspect Iliac Crest
Iliotibial Tract and Lateral Tibial condyle via Iliotibial Tract
68
What is the Innervation of Tensor Fascia Lata m.?
Superior Gluteal N. (L4-S10
69
What is the Blood Supply of Tensor Fascia Lata m.?
Lateral circumflex femoral a. & superior gluteal a.
70
What is the Action of Tensor Fascia Lata m.?
Abduct, Medially Rotate, and Flex Thigh (Maintains Extended Leg)
71
What is the Origin/Insertion of Piriformis m.?
Anterior Surface of the Sacrum (S2-4), Sacrotuberous L.
Superior Aspect Greater Trochanter of Femur
72
What is the Innervation of Piriformis m.?
Nerve to Piriformis m. (S1-S2)
73
What is the Blood Supply of Piriformis m.?
Gluteal A. and Lateral Sacral A.
74
What is the Action of Piriformis m.?
Laterally Rotate and Extended Thigh
| Abduct FLEXED Thigh, Stabilize Femoral Head in Acetabulum.
75
What is the Origin/Insertion of Superior Gemellus m.?
Ischial Spine / Medial Aspect Greater Trochanter of Femur
76
What is the Innervation of Superior Gemellus m.?
Nerve to the Obturator Internus m. (L5-S2)
77
What is the Blood Supply of Superior Gemellus m.?
Inferior Gluteal A.
78
What is the Action of Superior Gemellus m.?
Laterally Rotate Extended Thigh
| Abduct Flexed Thigh and Stabilize Femoral Head in Acetabulum
79
What is the Origin/Insertion of Inferior Gemellus m.?
Ischial Tuberosity / Medial Aspect Greater Trochanter of Femur
80
What is the Innervation of Inferior Gemellus m.?
Nerve to Quadratus Femoris m. (L4 - S1)
81
What is the Blood Supply of Inferior Gemellus m.?
Inferior Gluteal A.
82
What is the Action of Inferior Gemellus m.?
Laterally Rotate Extended Thigh
| Abduct Flexed Thigh and Stabilize Femoral Head in Acetabulum
83
What is the Origin/Insertion of Quadratus Femoris m.?
Lateral Aspect Ischial Tuberosity / Quadrate Tubercle on Intertrochanteric Crest
84
What is the Innervation of Quadratus Femoris m.?
Obturator N. (L2-L4)
85
What is the Blood Supply of Quadratus Femoris m.?
Inferior Gluteal A.
86
What is the Action of Quadratus Femoris m.?
Laterally Rotate Thigh / Stabilize Femoral Head in Acetabulum
87
What is the Origin/Insertion of Obturator Internus m.?
Pelvic Surfaces of Ilium and Ischium and Obturator Membrane
| Greater Trochanter of Femur
88
What is the Innervation of Obturator Internus m?
Nerve to Obturator Internus m. (L5-S2)
89
What is the Blood Supply of Obturator Internus m?
Superior Gluteal A.
90
What is the Action of Obturator Internus m.?
Laterally Rotate Extended Thigh
| Abduct Flexed Thigh, and Stabilize femoral head in Acetabulum
91
What is the Origin/Insertion of Biceps Femoris m.?
Long: Ischial Tuberosity / Lateral Aspect Fibular Head
Short: Linea Aspera and Lateral Supracondylar Line / Lateral Aspect Fibular Head
92
What is the Innervation of Biceps Femoris m.?
Long: Tibial Division of Sciatic N.
Short: Common Fibular Division of Sciatic N.
93
What is the Blood Supply of Biceps Femoris m.?
Perforating arteries of profunda femoris and superior muscular branch of popliteal artery
94
What is the Action of Biceps Femoris m.?
BOTH: Flex and Laterally Rotate Leg (When Flexed)
Long: Extends Thigh
95
What is the Origin/Insertion of Semitendinosus m.?
Ischial Tuberosity / Pes Anserinus
96
What is the Innervation of Semitendinosus m.?
Tibial Division of Sciatic N.
97
What is the Blood Supply of Semitendinosus m.?
Perforating arteries of Deep Femoris
98
What is the Action of Semitendinosus m.?
Extend Thigh, Flex and Medially Rotate Leg when Flexed
99
What is the Origin/Insertion of Semimembranosus m.?
Ischial Tuberosity / Posterior Aspect medial tibial condyle
100
What is the Innervation of Semimembranosus m.?
Tibial Division of Sciatic N.
101
What is the Blood Supply of Semimembranosus m.?
Perforating arteries of Deep Femoris
102
What is the Action of Semimembranosus m.?
Extend Thigh, Flex and Medially Rotate Leg when Flexed
