Lower Limb Flashcards
A 45YO motor cyclist sustains a tibial fracture and is noted to have anesthesia of the web space between his first and second toes. Which of the nerves listed below is most likely to be compromise?
Superficial peroneal nerve Deep peroneal nerve Sural nerve Long saphenous nerve Tibial nerve
Deep peroneal nerve
lies in the anterior compartment and can be compromise during compartment syndrome
Action
- gives 1st webspace
- Dorsiflexion of ankle joint
- Eversion of foot
- Extension of all toes
- injured = foot drop
A 72 years old man develops a foot drop after a revision total hip replacement. Which nerve is likely to have been affected ?
Sciatic Femoral Obturator Superior Gluteal Inferior Gluteal
Sciatic
A 20YO lady present with pain on the medial aspect of her thigh. Investigation shoes a large ovarian cyst. Compression of which of the nerves listed below is the most likely underlying cause ?
Sciatic Genitofemoral Obturator IIioinguinal Femoral cutaneous
Obturator
A 34YO man is injured by farm machinery and sustains a laceration at the superolateral aspect of the popliteal fosssa. The medial aspect of biceps femoris is lacerated. Which of the following underlying structures is at greatest risk of injury?
Gracilis Sural nerve Nerve to semimembranosus Popliteal artery Common peroneal nerve
Common peroneal nerve
The common peroneal nerve lies under the medial aspect of biceps femoris and is therefore at greatest risk of injury. The tibial nerve may also be damaged in such an injury
During a block dissection of the groin, the sartorius muscles is identified. What is the nerve supply to this muscle?
Obturator nerve Posterior division of the femoral nerve Anterior division of the femoral nerve Sciatic nerve Genitofemoral nerve
Anterior division of the femoral nerve
Most of the branches of the superficial femoral nerve are cutaneous. However, it does also supply sartorius.
A 56YO man undergoes a low anterior resection with legs in the Lloyd-Davies position. Post operatively he complains of footdrop. Which nerve has been injured?
Femoral nerve Tibial nerve Sciatic nerve Common peroneal nerve Sural nerve
Common peroneal nerve
Positioning legs in Lloyd-Davies stirrups can carry the risk of peroneal nerve neuropraxia if not done carefully
Which of the following forms the medial wall of the femoral canal?
Pectineal ligament Adductor longus Sartorius Lacunar ligament Inguinal ligament
Lacunar ligament
Femoral canal Lateral= Femoral vein Medial = Lacunar ligament Anteriorly = Inguinal ligament Posteriorly = Pectineal ligament
A 67YO man is undergoing a transurethral resection of a bladder tumor using diathemy. Suddenly during the procedure the patient’s thigh begins to twitch. Stimulation of which of the following nerves is the most likely cause?
Femoral Pudendal Sciatic Obturator Gluteal
Obturator
Obturator nerve is most closely related to the bladder
A 34YO man is short in the postero-inferior aspect of his thigh. Which of the following lies at the most lateral aspect of the popliteal fossa?
Popliteal artery Popliteal vein Common peroneal nerve Tibial nerve Small saphenous vein
Common peroneal nerve
Content of popliteal fossa from (medial - lateral) Popliteal artery Popliteal vein Tibial nerve Common peroneal nerve
Which is the origin of the superior gluteal artery ?
Internal iliac artery External iliac artery Femoral artery Common iliac artery Circumflex femoral artery
Internal iliac artery
gives rise to inferior gluteal artery (anterior trunk) and posterior gluteal artery (posterior trunk )
