Flashcards in MSK Session 7 Deck (77):
What forms the pelvic girdle?
2 innominate bones
What forms the hip bone?
Why bust the pelvis be carefully examined upon fracture in one location?
If its breaks in one place it is likely to break in another
How much movement does the sacroiliac joint allow?
A small amount
Slippage of what causes shortening of the leg in injury?
What is true leg length?
ASIS to medial malleolus
What is apparent leg length?
Umbilicus to medial malleolus
What weight bears when seated?
What does the acetabulum have components of?
What happens to the triradiate cartilage that joins the three components of the acetabulum in children?
It is ossified by 20-25 y.o.
Which is the weight bearing bone of the leg?
What does the tibia articulate with?
Proximally: condyles of femur
Proximally and distally: fibula
What develops on the tibia in osteoarthritis?
What line can be seen on the posterior tibia?
Why does the femur have a thin neck?
Allow for a large range of movement
What does the femur articulate with proximally?
What is the angle of inclination?
Axis of head and shaft
What causes external rotation of the leg in femoral neck fracture?
Lesser trochanter moving superiorly
Who can the anterior and posterior femur be identified?
Anterior has intertrochanteric line
Posterior has intertrochanteric crest (more visible)
Why is it possible to walk if the fibula is broken?
It is non weight bearing
What does the fibula articulate with?
Why must the leg be amputated if the fibula is congenitally absent?
Lack of muscle attachments
What are the 7 tarsus bones?
Which is the only bone of the fort that articulate as with the leg?
How many phalanges are present in the figure at toe?
How many phalanges are there in all digits except the great toe?
What is the direction of the 2 arches of the foot?
Front to back
Side to side
What are the anterior thigh muscles innervated by?
What movements do the anterior thigh muscles carry out?
Flexion at the hip
Extension of knee
Where do all of the quadriceps muscles converge?
What are the quadriceps muscles?
Which muscles in the anterior thigh are innervated directly from spinal level?
Which muscles form the iliopsoas group?
What is the blood supply to the anterior compartment of the thigh?
Aorta --> external iliac --> femoral artery --> deep artery of thigh --> circumflex --> perforating
What does the femoral artery turn into when it passes through the hiatus?
Describe the venous drainage of the anterior compartment of the thigh.
Saphenofemoral junction --> great saphenous vein --> posterior of medial condyle of femur --> anterior to medial maleolus
--> popliteal vein --> small saphenous vein
What is the main action of pectineus?
Assist w/medial rotation
What innervates pectineus?
What is the main action of psoas major?
Stabilising hip joint
What innervates psoas major?
Anterior rami of lumbar nerves L1-3
What is the main action of psoas minor?
Stabilise hip joint
What innervates psoas minor?
Anterior rami of lumbar nerves L1 and 2
What is the main action of iliacus?
Stabilise hip joint
What innervates iliacus?
What is the main action of sartorius?
Laterally rotate thigh
Flex leg at knee
What innervates sartorius?
What is the main action of quadriceps femoris?
Extend leg at knee
Rectus femoris steadies hip and assists iliopsoas flex
What innervates quadriceps femoris?
What are the muscles of the medial compartment of the thigh collectively known as?
How many muscles are there in the medial compartment of the thigh?
What innervates all 5 muscles of the medial compartment of the thigh?
What supplies all muscles of the medial compartment of the thigh?
What are the five muscles of the medial compartment of the thigh?
What is the main action of adductor longus?
What is the main action of adductor brevis?
Flexes thigh to some extent
What is the main action of adductor magnus?
Adductor part: flexes thigh
Hamstrings part: extends thigh
What is the main action of gracialis?
Helps rotate leg medially
What is the main action of obturator externus?
Laterally rotates thigh
Steadies head of femur in acetabulum
What forms the lateral border of the femoral triangle?
Medial border of sartorius
What forms the superior border of the femoral triangle?
What forms the medial border of the femoral triangle?
Medial border of adductor longus
What forms the floor of the femoral triangle?
What forms the roof of the femoral triangle?
What is the contents of the femoral triangle moving lateral to medial?
Femoral nerve and its terminal branches
Femoral artery and several of its branches
Femoral vein and its proximal tributaries
What are the proximal tributaries of the femoral vein?
Great saphenous vein
Profundua femoris vein
What is the femoral sheath?
3-4 cm long funnel-shaped fascial compartment lining the vascular compartment of the retro-inguinal space
What does the femoral sheath house?
What does the space in the femoral canal allow for?
Venous and lymph distension during different levels of flow
What is housed within the femoral canal?
Deep inguinal lymph node
What is outside the femoral canal but within the femoral triangle?
What is a femoral hernia?
Small intestine pushed through femoral ring
What is the femoral ring?
Weak point in anterior abdominal wall
What bounds the femoral ring?
Medially: lacunar ligament
What does a femoral hernia initially compress?
What can cause strangulation of a femoral hernia?
Why are femoral hernias more common in women?
They usually have a wider pelvis