MSK 5 - Lower Limbs 1 Flashcards
How many bones is the hip bone composed of?
3 seperate bones on each side
What 3 bones form hip bone?
- 3 bones on each side
- Ilium
- Ischium
- Pubis
What is a?
Anterior superior iliac spine (ASIS)
What is b?
Iliac crest
What is c?
Iliac fossa
What is d?
Pubic tubercle
What is e?
Pubic crest
What is f?
Obturator foramen
What is g?
Acetabular cavity
What is h?
Ischial spine
What is i?
Ischial tuberosity
What bone is 1?
Ilium
What bone is 2?
Ischium
What bone is 3?
Pubis
What is the longest bone in the body?
The Femur is the longest bone in the body and runs from the hip joint to the knee joint, it is exclusively found in the thigh
What is a?
Neck of femur
What is b?
Lesser troachanter of femur
What is c?
Lateral condyle of femur
What is d?
Greater trochanter of femur
What is e?
Medial condyle of femur
What is f?
Head of femur
What is g?
Intertrochanteric line
What does the femur articular with proximally?
The femoral head articulates with the acetabulum of the hip to form the hip joint
The two hemi-pelvises articulate in the midline at the pubic symphysis
What does the femur head articulate with?
Acetabulum of hip
What are the superficial veins of the lower limb?
The two superficial veins are the great sephenous vein and lesser sephenous vein
What are the great and lesser sephanous veins tributaries of?
Dorsal venous arch of foot
What does the great sephanous vein drain into?
Femoral vein at medial aspect of thigh
Does great sephanous vein drain into femoral vein at lateral or medial aspect of thigh?
Medial
What is A?
Great sephanous vein
What is B?
Lesser sephanous vein
What is C?
Dorsal venous arch
Which superficial vein ascends anterior to the medial malleolus of the tibia?
Great saphenous vein
Which superficial vein ascends posterior to the lateral malleolus?
Lesser saphenous vein
Which superficial vein empties into the femoral vein?
Great saphenous vein
Which superficial vein empties into the popliteal vein?
Lesser saphenous vein
What are varicose veins?
Valves are present in the saphenous vein to prevent pooling of blood in the legs
If these valves become incompetent, the thin vessels dilate, and become torturous forming varicose veins
What is it called when varicoe veins become inflammed?
Thrombophlebitis
What do the deep veins of lower leg ascend with?
Their respective major arteries
How does blood ascend in the deep veins?
Muscle contractions
What is deep vein thrombosis?
If a thrombus occurs in the deep veins of the lower leg this is called a deep vein thrombosis.
What are possible complications of DVT?
If a thrombus becomes dislodged and migrates away its source it is called an embolus.
If this lodges in the lungs then it is a pulmonary embolus, a potentially life-threatening clinical condition.
What are the 3 groups of lymphatics where lymph from lower limbs drains?
- Superficial inguinal
- Deep inguinal
- Popliteal
Lymphatics accompanying the following drain where:
- great sephanous vein
- lesser sephanous vein
- Greater sephanous vein
- Superficial inguinal nodes
- Small sephanous vein
- Popliteal lymph nodes
Where must an infection be to cause enlargement of inguinal lymph nodes?
Any structure inferior to level of umbilicus, including lower limbs
How does sensory supply of lower limbs differ from upper limbs?
However, the major difference is that the sensory supply comes from the lumbar and sacral plexus (not just the brachial plexus).
What dermatome supplies the anterior of knee?
L3
What dermatome supplies the big toe?
L5
What dermatome supplies the little toe?
S1
What dermatome supplies:
- A
- B
- C
- D
A - L1
B - S3
C - S4
D - L2
What dermatome supplies:
- E
- F
- G
- H
E - L3
F - L4
G - L5
H - S1
What dermatome supplies:
- I
- J
- K
- L
I - S2
J - L2
K - S3
L - S4
What dermatome supplies:
- M
- N
- O
- P
M - coccyx
N - S5
O - L3
P - S2
What dermatome supplies:
- Q
- R
- S
- T
Q - L5
R - L4
S - S1
T - L5
In general, what plexus supplies sensory innervation to:
- anterior leg
- posterior leg
Anterior leg - lumbar plexus
Posterior leg - sacral plexus
What dermatome supplies the:
- testicles
- penis
Testicles - S4
Penis - S3
What kind of joint is the hip joint?
Ball and socket
Why is the hip joint more stable than the shoulder joint?
The ball of the hip is entirely surrounded by the socket of the pelvis, whereas the shoulder is more similar to a golf ball resting on a tree
What is the ring of cartilage called that surrounds the acetabulum of hip
Acetabular labrum
What part of the acetabular cavity does the acetabular labrum cover?
The rim, increases the depth of the acetabulum
What are the 3 main ligaments of the hip joint?
- Ilio-femoral ligament
- Pubofemoral ligament
- Ischiofemoral ligament
What do the following ligaments prevent:
- ilio-femoral
- pubofemoral
- Ilio-femoral
- Prevents hyperextension of hip joint
- Pubofemoral
- Prevents hyper abduction of hip joint
What is 1?
Ilio-femoral ligament
What is B?
Pubofemoral ligament
What is C?
Ischiofemoral ligament
What movements can be done at the hip?
- Flexion
- Extension
- Abduction
- Adduction
- Internal rotation
- External rotation
- Circumduction (combination of above)
What are the muscles of hip flexion?
- Iliacus
- Psoas major
- Pectineus
What is 1?
Iliacus
What is 2?
Psoas major
What is 3?
Pectineus
Iliacus:
- origin
- insertion
- innervation
- Origin
- Inner pelvis and posterior abdominal wall
- Insertion
- Greater trochanter of femur
- Innervation
- Lumbar plexus
Psoas major:
- origin
- insertion
- Origin
- Inner pelvis and posterior abdominal wall
- Insertion
- Greater trochanter of femur
At the insertion on the greater trochanter of femur what happens?
Iliacus and psoas major share a common tendon, becoming called iliopsoas muscle
Pectineus:
- origin
- insertion
- Origin
- Pubis bone
- Insertion
- Femur
What supplies:
- iliacus
- psoas major
- pectineus
Hip flexors all supplies by lumbar plexus
What are the 3 functional groups of the hip extensors?
- Gluteus maximus
- Hamstrings (composed of 3 muscles)
- Posterior part of adductor magnus
What is the main extensor of the hip joint?
Gluteus maximus