Week 4 Lecture 2 Flashcards
1
Q
During a 400m running race, Devon strained a muscle in the back of his thigh. What are the 2 main functions
of the muscles in this group?
A
thigh extension, hip extension, knee flexion
2
Q
During a 400m running race, Devon strained a muscle in the back of his thigh.If these muscles are unable to function properly, what muscle in the gluteal region could also perform one of
these functions?
A
gluteus maximus
3
Q
b
A
lesser siactic foramen
4
Q
a
A
greater sciatic foramen
5
Q
c
A
Sacrospinous ligament
6
Q
d
A
Sacrotuberous ligament
7
Q
e
A
Obturator membrane
8
Q
a
A
greater trochanter
8
Q
f
A
Obturator canal
9
Q
b
A
lesser trochanter
10
Q
c
A
gluteal tuberosity
11
Q
d
A
Linea aspera
12
Q
e
A
Medial and Lateral supracondylar lines
13
Q
a
A
L4 level of iliac crests
14
Q
b
A
Intergluteal cleft
15
Q
c
A
Ischial tuberosity
16
Q
d
A
gluteal fold
17
Q
e
A
greater trochanter
18
Q
Gluteal Muscle: Tensor Fasia Latae Function
A
Flexes hip
* Tenses IT band
19
Q
Gluteal Muscles: Tensor Fasia latae Innervation
A
Superior Gluteal Nerve
20
Q
Gluteus Maximus Action
A
The major ‘extensor’ of
the thigh also laterally rotates
and assists with abducts thigh.
21
Q
Gluteus Maximus Innervation
A
Inferior gluteal
nerve (L5, S1, S2)
22
Q
a
A
Gluteus medius
23
Q
b
A
Gluteus minimus
24
c
Piriformis
25
d
Gemellus superior
26
e
Obturator Internus
27
f
Gemellus Inferior
28
g
Quadratus femoris
29
Glueteus Medius Action
Abducts and medially rotates thigh also steadies the pelvis during walking.
30
Gluteus Medius Innervation
Superior gluteal nerve (L4,L5, S1)
31
Gluteus Minimus Action
: Abducts and medially rotates thigh also
steadies the pelvis during walking (same as
Medius)
32
Gluteus Minimus Innervation
: Superior gluteal nerve (L4,L5, S1)
33
Obdurator externus Action
Lateral rotation and adduction
34
Obturator Externus Innervation
Obturator nerve (medial
compartment nerve)
35
Piriformis Syndrome
Inflammation of piriformis leads to
compression of neighbouring structures
* Symptoms can include pain, numbness,
tingling or down the lower limb, or in
gluteal region
* Common in activities that require
excessive use of gluteal muscles
(running, ice skating)
36
Gluteal Compartments Muscle List (8)
Tensor fasciae latae
Gluteus maximus
Gluteus medius
Gluteus minimus
Piriformis
Gemelli
Obturator internus
Quadratus femoris
37
Hamstring Muscles List
Biceps femoris
Semitendinosus
Semimembranosus
38
Hamstring Muscles characteristics
1) all originate from ischial
tuberosity
2) all cross the knee joint
and hip
3) all act to extend the thigh
and flex the knee
4) all innervated by branch
of sciatic nerve
39
a
Biceps femoris long head
40
b
Biceps Femoris short head
41
c
Semitendinosus
42
d
Semimembranosus
43
Biceps Femoris Action
extends thigh (long head only)
and flexes the knee (both heads), also
laterally rotates the leg
44
Biceps Femoris Innervation
sciatic nerve divisions:
tibial nerve to long head, common
fibular nerve to short head
45
Semimembranosus Action
Extends thigh and flexes the knee and
medially rotates the leg
46
Semimembranosus Innervation
Sciatic nerve (tibial divison)
47
Semitendinosus Action
: Extends thigh at the hip and flexes the
knee and medially rotates the leg
48
Semitendinosus Innervation
Sciatic nerve (tibial division)
49
Pez Anerinus
3 different muscles
3 different compartments
3 different innervations
Sartorious
Semitendinosus
Gracilis
50
a (Muscle, Innervation, Action)
Sartorius
Flexes thigh at hip joint
* abducts and laterally rotates the thigh - weakly
* flexes leg at knee - weakly
Innervation: Femoral nerve
51
b
femur
52
c (Muscle, Innervation, Action)
rectus femoris
Action:
* Extends knee and
* Flexes thigh at hip
Innervation: Femoral nerve
53
d (Muscle, Innervation, Action)
Vastus intermedius
Action: Extends knee
Innervation: Femoral nerve
54
e (Muscle, Innervation, Action)
vastus lateralis
Action: Extends knee
Innervation: Femoral nerve
55
f (Muscle, Innervation, Action)
Biceps femoris
Action: extends thigh (long head only)
and flexes the knee (both heads), also
laterally rotates the leg
Innvervation: sciatic nerve divisions:
tibial nerve to long head, common
fibular nerve to short head
56
g (Muscle, Innervation, Action)
adductor magnus
Action: Anterior fibers adduct and medially rotate and
flex thigh; posterior fibers is synergistic with the
hamstrings during thigh extension
Innervation: Obturator nerve and sciatic nerve (tibial n)
57
h (Muscle, Innervation, Action)
Semitentenosus
Action: Extends thigh at the hip and flexes the
knee and medially rotates the leg
Innvervation: Sciatic nerve (tibial division)
58
i (Muscle, Innervation, Action)
Semimembranosus
Action: Extends thigh and flexes the knee and
medially rotates the leg
Innervation: Sciatic nerve (tibial divison)
59
j
Gracilis
60
k (Muscle, Innervation, Action)
Adductor longus
Action: Adducts and Flexes the thigh
Innervation: Obturator nerve (L2,3,4)
61
Action and muscles
abduction|abduction*, gluteus medius|gluteus minimus|*medius*|*minimus*|tensor**
62
a (Muscle, Innervation, Action)
rectus femoris
Action:
* Extends knee and
* Flexes thigh at hip
Innervation: Femoral nerve
63
c (Muscle, Innervation, Action)
vastus lateralis
Action: Extends knee
Innervation: Femoral nerve
63
b (Muscle, Innervation, Action)
vastus intermedius
Action: Extends knee
Innervation: Femoral nerve
63
d (Muscle, Innervation, Action)
biceps femoris (short head)
Action: extends thigh (long head only)
and flexes the knee (both heads), also
laterally rotates the leg
Innvervation: sciatic nerve divisions:
tibial nerve to long head, common
fibular nerve to short head
64
d (Muscle, Innervation, Action)
Biceps femoris (short head)
Action: extends thigh (long head only)
and flexes the knee (both heads), also
laterally rotates the leg
Innvervation: sciatic nerve divisions:
tibial nerve to long head, common
fibular nerve to short head
65
e (Muscle, Innervation, Action)
biceps femoris (long head)
Action: extends thigh (long head only)
and flexes the knee (both heads), also
laterally rotates the leg
Innvervation: sciatic nerve divisions:
tibial nerve to long head, common
fibular nerve to short head
66
f
sciatic nerve
67
g (Muscle, Innervation, Action)
semitendinosus
Action: Extends thigh at the hip and flexes the
knee and medially rotates the leg
Innvervation: Sciatic nerve (tibial division)
68
h (Muscle, Innervation, Action)
semimembranosus
Action: Extends thigh and flexes the knee and
medially rotates the leg
Innervation: Sciatic nerve (tibial divison)
69
i (Muscle, Innervation, Action)
Adductor magnus
Action: Anterior fibers adduct and medially rotate and
flex thigh; posterior fibers is synergistic with the
hamstrings during thigh extension
Innervation: Obturator nerve and sciatic nerve (tibial n)
70
j
Gracillis
71
k (Muscle, Innervation, Action)
Adductor Longus
Action: Adducts and Flexes the thigh
Innervation: Obturator nerve (L2,3,4)
72
l (Muscle, Innervation, Action)
Sartorius
Actions:
* Flexes thigh at hip joint
* abducts and laterally rotates the thigh - weakly
* flexes leg at knee - weakly
Innervation: Femoral nerve
73
m (Muscle, Innervation, Action)
Vastus medialis
Action: Extends knee and helps stabilize patella
Innervation: Femoral nerve
74
n
femur
