Getting on my nerves
What nerve(s) innervated the adductor magnus?
Obturator n. and tibial portion of sciatic n.
What muscle can be innervated by the femoral and obturator nerves?
Pectineus
What are the borders of the femoral triangle?
Superiorly = inguinal ligament
Medially = adductor longus
Laterally = sartorius
A patient presents with difficultly climbing stairs and a ‘waddling’ gait. O/E there is weakness in knee extension and a loss of sensation over the anterior thigh. What peripheral nerve injury is most likely?
Femoral nerve
What are the terminal branches of the sciatic nerve?
Tibial and common fibular/peroneal nerves
What muscle(s) attach to the iliotibial band/tract?
Gluteus maximus and tensor fascia latae (TFL)
What are the key contents of the femoral triangle from lateral and medial?
NAVL = Femoral nerve, femoral artery, femoral vein, lymphatics/femoral canal
A patient presents with difficultly climbing stairs and a ‘waddling’ gait. O/E there is weakness in knee extension and a loss of sensation over the anterior thigh. What peripheral nerve injury is most likely?
Trendelenburg sign - Gluteus medius and minimis
What nerve provides sensory innervation to the skin of the lateral thigh?
Lateral femoral cutaneous nerve
The hamstring muscles (except short head of biceps femoris) all produce what movements at the hip and knee?
Hip extension and knee flexion
What muscle forms the adductor hiatus and why is this region significant?
Adductor magnus - Allows femoral artery and vein to pass into popliteal fossa
What is the special test from the hip examination that is testing hip flexor tightness?
The Thomas test
What are the nerve roots of the femoral nerve?
L2-4
Where do the psoas major and iliacus muscles attach to the femur?
The lesser trochanter of the femur
Which inguinal ring is more medial and what muscle forms it?
Superficial inguinal ring - Aponeurosis of external oblique
A patient is admitted to ED with a pelvic fracture involving the pubic rami. Which nerve is most likely at an increased risk of injury and what functional deficits would you expect if this nerve is injured?
Obturator nerve - Weakness in hip adduction and sensory loss over medial thigh