Lower limb neurovascular supply Flashcards
Which nerve sgives cutaneous supply to medial malleolus?
Saphenous nerve
Which nerve gives cutaneous supply to lateral half of hallux and medial half of 2nd toe?
Deep fibular (peroneal) nerve
Which nerve gives cutaneous supply to lateral malleolus?
Dorsal lateral cutaneous nerve
Which nerve gives cutaneous supply to majority of dorsum of foot?
Superficial fibular (peroneal) nerve
The majority of the sole of the foot is supplied by which nerve?
Branches of the tibial nerve
The dorsalis pedis artery is a continuation of which artery?
Anterior tibial artery
Where is the dorsalis pedis artery palpable?
Dorsal surface of foot
Running towards the first dorsal interosseous space
The sciatic nerve is derived from which nerve roots?
L4-S3
Which muscled does the sciatic nerve supply?
Posterior thigh and hamstring portion of adductor Magnus
**Indirectly innervates (terminal branches) all the muscles of the leg and foot.
How does the sciatic nerve enter the gluteal region?
Via the greater sciatic foramen.
Where does the sciatic nerve emerge once it has passed through the greater sciatic foramen?
Inferiorly to the piriformis muscle
How does the sciatic nerve enter the posterior thigh?
Passes deep to the long head of the biceps femoris.
Where does the sciatic nerve terminate?
The apex of the popliteal fossa (splits into tibial and Common Fibular nerves)
Where do the hypothetical lines splitting the buttock into quadrants run from and to?
Vertical - inferiorly from highest point of iliac crest
Horizontal - half way between the highest point on the iliac crest and ischial tuberosity
Where should IM injections be given in the gluteal region?
Upper lateral quadrant only (to avoid sciatic nerve in lower quadrants)
Which nerve roots supply the femoral nerve?
L2-L4
Which muscles are innervated by the femoral nerve?
Anterior thigh muscles (hip flexion + knee extension)
What are the sensory innervations of the femoral nerve?
Anteromedial thigh
Medial side of leg and foot (saphenous nerve)
The obturator nerve is derived from which nerve roots?
L2-L4
What are the motor functions of the obturator nerve?
Muscles of medial compartment of thigh
What is the function of the lateral cutaneous femoral nerve?
Purely sensory
Provides sensation to front and sides of the thigh
Which nerve roots supply the common peroneal nerve?
L4-S2
What muscles are innervated by the common peroneal nerve?
Short head of biceps femoris
Branches supply anterior and lateral leg
What is the sensory innervation of the common peroneal nerve?
Skin of lateral leg
Dorsum of foot
Which nerve roots supply the tibial nerve?
L4-S3
What muscles are innervated by the tibial nerve?
Posterior compartment of the leg
Majority of intrinsic foot muscles
What is the sensory innervation of the tibial nerve?
Skin of posterolateral leg
Lateral foot
Sole of foot
What is the main artery that supplies blood to muscles supplied by the obturator nerve?
Profunda femoris artery
