Blood, sensory and motor nerve supply of the lower limb Flashcards
Which vein takes blood from groin to external leg?
External iliac vein
What happens to the external iliac vein at the groin crease?
Splits into common and deep femoral artery
Are perineal and fibular the same thing?
Yes
What is claudication?
Pain/limp caused by poor blood flow to limb
Which arteries are used to test blood gases?
Femoral
Where do popliteal vessels stem from?
Popliteal fossa
Where can you feel pulse?
Tibial arteries
Where does the saphenous vein run?
Malleolus to femur
What are the three compartments of the thigh?
Quads, long saphenous vein adductors and hamstrings
Why are femoral shaft fractures dangerous?
Lose a lot of blood
Which muscles are in the anterior compartment?
Sartorius and 4 quads
What are the four heads of the quads?
Rectus femoris, vastus medialis, vastus lateralis, vastus intermedius
Which nerve supplies anterior compartment?
Femoral
Which artery supplies the anterior compartment?
Profunda
What is the common femoral artery made up of?
Superficial and deep
What are compartments in the thigh separated by?
Fascias
What is a grade 1 injury?
Mild strain
What is a grade 2 injury?
Partial muscle tear
What is a grade 3 injury?
Severe muscle tear
Which nerve innervates the posterior compartment of the thigh?
Sciatic nerve
Which artery provides blood flow to the posterior compartment of the thigh?
Profunda femoris artery
What does the medial compartment of the thigh do?
Adduction
Which nerve innervates the medial compartment of the thigh?
Obturator
Which artery provides blood flow to the medial compartment of the thigh?
Profunda femoris/obturator
What does the sciatic nerve divide into in the leg?
Tibial and common fibial nerves
What causes a foot drop?
Squashed common peroneal nerve
What does the posterior artery divide into in the foot?
Plantar arteries
What does the anterior compartment of the leg do?
Dorsiflex/extension
Which artery provides blood to the anterior compartment of the leg?
Anterior tibial
Which nerve innervates the anterior compartment of the leg?
Deep peroneal/fibular nerve
Which artery supplies the lateral compartment of the leg?
Fibular
Which nerve innervates the lateral compartment of the leg?
Superficial peroneal/fibular nerve
What does the posterior compartment of the leg do?
Plantar flex
Which nerve innervates the posterior compartment of the leg?
Tibial nerve
Which artery supplies the posterior compartment of the leg?
Posterior tibial
Why are fascias prone to increased intracompartmental pressure?
Infection with pus formation, inflammation, bleeding after fracture and severe burns/trauma
How does Volksmann’s ischaemic contracture form?
Missed compartment syndrome in forearm following debridement
What do the lumbar nerves L1 to L4 supply?
Supply lower abdominal wall, anterior and medial thigh (sensory and motor)
What is the intervertebral foramen?
Hole through which nerves emerge
What do the nerves L4 to S4 supply?
Buttock, lower limb, pelvis and perineum
Which nerve is most commonly injured with a misplaced injection?
Sciatic
Symptoms of nerve damage
Burning, pins and needles numbness, altered sensation
What is a myotome?
Group of muscles innervated by same spinal nerve
What does L2 do?
Hip flexion
What does L3 do?
Knee extension
What does L4 do?
Dorsiflexion
What does L5 do?
Great toe extension
What does S1 do?
Planter flexion/eversion/hip extension
What does S2 do?
Knee flexion
Symptoms of S1 weakness
Limp - affect calf muscles and muscle surrounding ankle
Symptoms of L5 weakness
Impacts ability to lift big toe (tripping over)
Symptoms of L4 weakness
Foot drop - affects muscles that lift foot