Hip, buttock and thigh (B) Flashcards
What small muscle is found underneath vastus intermedius?
Articularis genu
What bursa is found just above the knee joint?
Suprapatellar bursa
What movement are the muscles in the medial compartment of the thigh responsible for?
Adduction of the hip
Which muscles make up the medial compartment of the thigh?
Obturator externus Gracilis Adductor brevis Adductor longus Adductor magnus
Where do most of the muscles of the medial compartment attach proximally?
Pubic bone
Describe the structure of adductor magnus.
It has a broad attachment to the shaft of the femur (medial lip of the linea aspera) and then a smaller attachment to the adductor tubercle (just superior to the medial epicondyle)
The gap in between is called the hiatus of adductor magnus
What movements are the muscles of the posterior compartment of the thigh responsible for?
Hip extension
Knee flexion
Which muscles make up the posterior compartment of the thigh?
Semitendinosus
Semimembranosus
Biceps femoris
Where do the muscles of the posterior compartment attach proximally?
Ischial tuberosity
Describe the attachments of biceps femoris.
The long head of biceps femoris comes from the ischial tuberosity and the short head comes off the shaft of the femur (lateral lip of linea aspera)
They cross over laterally to attach to the head of the fibula
What are the borders of the femoral triangle?
Superior – Inguinal Ligament
Lateral – Sartorius
Medial – Adductor Longus
What are the contents of the femoral triangle (medial to lateral)?
Deep inguinal lymph nodes
Femoral Vein
Femoral Artery
Femoral Nerve
What is the name given to the opening in the fascia lata over the femoral triangle and what is its purpose?
Saphenous Opening – it allows the draining of the long saphenous vein into the femoral vein
The margin of the saphenous opening is called the Falciform Margin
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What structures form the Adductor Canal?
Anterior – Vastus Medialis
Posterior – Adductor Longus and Adductor Magnus
Medial – Sartorius
What are some other names for the Adductor Canal?
Hunter’s Canal
Subsartorial Canal
What are the contents of the Adductor canal?
Femoral artery
Femoral vein
Saphenous nerve (major branch of the femoral nerve)
Where does the sciatic nerve lie within the gluteal region?
Inferior medial quadrant (NOTE: there are variations in terms of the emergence of the sciatic nerve relative to piriformis)
What two nerves does the sciatic nerve divide into?
Tibial Nerve
Common Peroneal Nerve
Where would you perform an intramuscular injection into the gluteal region?
Superior lateral quadrant (to avoid the sciatic nerve which is in the inferior medial quadrant)
What does the sciatic nerve supply?
Muscles of the posterior compartment of the thigh (hamstrings)
All the muscles below the knee (supplies by the two branches of the sciatic)
What test is used to assess the function of the hip abductors?
Trendelenberg test
When a patient lifts one foot off the floor, their hip abductors (gluteus medius and gluteus minimus) should contract to keep the pelvis level despite the extra weight of the raised foot on the opposite side
Describe the structure of the acetabulum.
The acetabulum has a depression in the middle (acetabular fossa) and a lunate surface (surrounding the fossa)
There is an acetabular notch, which is filled in by the transverse acetabular ligament
What is the small depression on the head of the femur called?
Fovea capitis (fovea=pit, capitis= head) ie a depression on the head of the femur This is the attachment of the ligamentum teres
What are the ligaments of the hip joint?
Iliofemoral ligament (Y shaped)
Ischiofemoral ligament
Pubofemoral ligament
Transverse acetabular ligament
Describe how the arrangement of these ligaments changes when the hip is flexed and extended.
When the hip is flexed, these ligaments are relaxed
When the hip is extended (e.g. when standing) the ligaments wind, which pulls the head of the femur into the acetabulum and helps stabilise the joint when in the standing position
Describe the blood supply to the head of the femur.
The main blood supply is via the medial circumflex femoral artery and the lateral circumflex femoral artery (both from profunda femoris)
There is a small blood supply from the artery of the head of the femur (branch of obturator artery - this is more important in children)
What type of hip fracture is most likely to need a hip replacement and why?
Intracapsular – this is more likely to disrupt the blood supply and cause avascular necrosis of the head of the femur
When does the external iliac artery become the femoral artery?
As it passes under the inguinal ligament
What main branch does the femoral artery give off that gives rise to the medial and lateral circumflex femoral arteries?
Profunda femoris
At what point do the superficial femoral artery and the femoral vein become the popliteal artery and vein?
As they pass through the hiatus of adductor magnus
Which arteries, that supply the buttock and thigh, are branches of the internal iliac?
Superior gluteal and Inferior gluteal arteries
Obturator artery
What is the main superficial vein of the thigh?
Long saphenous vein
What other veins drain into the saphenous vein before it enters the sapheno-femoral junction?
Superficial circumflex iliac
Superficial epigastric
Superficial external pudendal
Lateral cutaneous nerve of the thigh
What are the deep veins of the hip, buttock and thigh region?
Popliteal vein Femoral vein External iliac vein Sapheno-femoral junction Venae comitantes of the profunda femoris artery
What are the main groups of lymph nodes in the thigh?
Deep inguinal lymph nodes
Superficial inguinal lymph nodes
External iliac lymph nodes
Which nerve supplies the anterior compartment and which division of the lumbosacral plexus gives rise to this?
Femoral nerve – posterior division of the lumbosacral plexus (L234)
Which nerve supplies the medial compartment and which division of the lumbosacral plexus gives rise to this?
Obturator nerve – anterior division of lumbosacral plexus (L234)
State which roots are responsible for: Hip flexion Hip extension Knee extension Knee flexion
Hip flexion: L23
Hip extension: L45
Knee extension: L34
Knee flexion: L5S1
Which nerve supplies the posterior compartment of the thigh and which nerve roots give rise to this nerve?
Sciatic nerve (L45S123)
Which nerves supply the gluteal muscles and which nerve roots give rise to these nerves?
Superior gluteal nerve (L45S1)
Inferior gluteal nerve (L5S12)
Which nerve roots are responsible for the sensory supply to the:
Front of the thigh
Back of the thigh
Buttock
Front of the thigh: T12, L123
Back of the thigh: S123
Buttock: S234
Which nerve roots give rise to the following sensory peripheral nerves:
Subcostal nerve: T12
Ilio-hypogastric nerve: L1
Ilio-inguinal nerve: L1
Genito-femoral nerve: L12
Lateral cutaneous nerve of the thigh: L23
Sensory branches of the femoral nerve: L234
Sensory branches of the obturator nerve: L234
Posterior cutaneous nerve of the thigh: S123
Saphenous nerve: L234
Buttock nerves from the sacral plexus: L1-S3
