Lower Limb Anatomy Flashcards
Describe the characteristic features of the hip joint
- Diarthrodial joint
- Weight bearing
- Ball and socket
Name the static and dynamic stabilisers of the hip
- Static: bony morphology (congruence and anteversion of ball and socket) and labrum (negative intra-articular pressure)
- Dynamic: musculature
Name the two superficial veins of the lower limb
- Great saphenous vein
- Short saphenous vein
Where does the short saphenous vein drain into?
Popliteal vein
Where does the great saphenous vein drain into?
Femoral vein
Name the important lymph node groups in the lower limb
Superficial inguinal, deep inguinal and popliteal lymph nodes
Why is the hip joint more stable than the shoulder joint?
Deeper socket - less dependent on muscles
What is the acetabular labrum and what is its function?
Fibrocartilaginous collar - lines the rim of the cavity and deepens the hip joint
List the 3 main ligaments of the hip joint
- Iliofemoral
- Pubofemoral
- Ischiofemoral
What is the function of the iliofemoral ligament?
It prevents hyperextension of the hip joint
What is the function of the pubofemoral ligament?
It prevents hyper abduction of the hip joint
Name the flexors of the hip
- Iliacus and psoas major form iliopsoas
- Pectineus
- Sartorius
- Adductus longus
Name the extensors of the hip
- Gluteus maximus
- Biceps femoris
- Semitendinosus
- Semimembranosus
Which muscle is the main extensor of the hip joint?
Gluteus maximus
Which muscle is the main flexor of the hip joint?
Iliopsoas
Name the adductor muscles of the hip
- Adductor longus
- Adductor brevis
- Adductor magnus
- Gracilis
- Obturator externus
Which nerve supplies the adductor compartment of the hip?
Obturator nerve
Name the abductors of the hip
- Gluteus maximus
- Gluteus medius
- Gluteus minimus
- Tensor fascialata
Name the medial rotators of the hip
- Gluteus medius
- Gluteus minimus
- Tensor fascia lata
- (+adductor longus, brevis and magnus and pectineus)
Name the three compartments of the thigh
- Anterior/extensors of the knee/quadriceps
- Medial/adductors of the hip
- Posterior/flexors of the knee/hamstrings
Name the four heads of quadriceps femoris
- Rectus femoris
- Vastus medialis
- Vastus lateralis
- Vastus intermedius
Which nerve innervates the anterior thigh muscles?
Femoral nerve (L2-4)
What is the action of rectus femoris on the hip joint?
Flexion
Which muscle forms the the quadriceps tendon which continues as the patellar ligament?
Quadriceps femoris
What is the action of the quadriceps?
- Mainly extensors of the knee
- Some are hip flexors
What are the actions of sartorius?
- Flexion of the hip
- Abduction of the leg
- Lateral rotation of the hip
- Flexion of the knee
Name the adductors of the leg
- Adductor magnus
- Adductor brevis
- Adductor longus
- Gracilis
- Obturator externus
Which nerve innervates the medial thigh musles?
Obturator nerve
The femoral artery is a continuation of which artery?
External iliac artery
The femoral artery enters the thigh between which two bony landmarks?
- ASIS
- Pubic tubercle
Which vein does the femoral vein drain into?
External iliac vein
Which two veins drain into the femoral triangle?
- Profunda femoris vein
- Great saphenous vein
List the muscles supplied by the femoral nerve
- Sartorius
- Pectineus
- Iliacus
- Quadriceps femoris
Which structures form the borders of the femoral triangle?
- Medial border: adductor longus
- Lateral border: sartorius
- Base: Pectineus, iliopsoas and adductor longus
What are the contents of the femoral triangle?
Femoral artery, vein and nerve
What is the femoral sheath and what does it contain
- A funnel shaped fascial tube
- Surrounds the proximal parts of the femoral vessels and medially the femoral canal which contains deep inguinal lymph nodes
Where does the adductor canal run?
From the femoral triangle to the popliteal fossa under the musculature
What are the contents of the adductor canal?
- Femoral artery
- Femoral vein
- Nerve to vastus medialus
- Saphenous nerve
Name the two major nerves of the lumbar plexus
- Femoral
- Obturator
What are the nerve roots of the lumbar plexus?
L1-4
Which structures make up the pelvic girdle?
- Sacrum
- Right and left hip bones
- Pubic symphysis
- Sacroiliac joints
Which foramen is the route for structures entering or leaving the pelvis?
Greater sciatic
Which foramen is the route for structures entering or leaving the perineum?
Lesser sciatic foramen
Which muscles make up the superficial gluteal region ?
- Gluteus maximus
- Gluteus medius
- Gluteus minimus
- Tensor fasciae latae
Which muscles make up the deep gluteal region?
- Piriformis
- Obturator internus
- Superior and inferior gemelli
- Quadratus femoris
What is the deep fascia of the thigh called?
Fascia lata
What is the name for the lateral part of the fascia lata?
Iliotibial tract
Which two muscles are attached to the iliotibial tract?
- Tensor fascia latae
- Gluteus maximus
What is the innervation of gluteus maximus?
Inferior gluteal nerve
What is the innervation of gluteus medius, gluteus minimus and tensor fasciae latae?
Superior gluteal nerve
What is the action the deep muscles in the gluteal region?
Stabilisation of the hip and lateral rotation of the hip
What are the nerve roots of the sacral plexus?
L4-S4
Name the two main branches of the sacral plexus
- Sciatic nerve
- Pudendal nerve
Which nerve roots form the lumbosacral trunk?
L4 and 5
Name the two terminal branches of the sciatic nerve
- Tibial nerve
- Common fibular nerve
Name the hamstring muscles
Semimembranosus
-Semitendinosus
What are the actions of the hamstring muscles?
Extension of the hip and flexion of the knee
Which nerve innervates the hamstring muscles?
Sciatic nerve
What type of joint is the knee joint?
Synovial hing
Which leg bone is not involved in the knee joint?
Fibula
Which muscle is most important in stabilising the knee joint?
Quadriceps femoris
Name the two collateral ligaments of the knee and where they run
- Fibular/lateral: lateral epicondyle of the femur to the head of the fibula
- Tibial/medial: medial epicondyle of the femur to the medial surface of the tibia
Name the two crucuiate ligaments
Anterior and posterior crucuiate ligament
What is the function of the anterior cruciate ligament?
It prevents the femur from sliding anteriorly and prevents hyperextension of the knee
What is the function of the posterior cruciate ligament?
It prevents the femur from sliding posteriorly
What are the functions of the menisci of the knee?
Deepen the surface and provide shock absorption
Name the muscles that flex the knee?
- Semitendinosus
- Semimembranosus
- Biceps femoris
Name the muscles that extends the knee
Quadriceps
Name the bursae that surround the knee joint
- Suprapatellar
- Subcutaneous
- Deep infrapatellar
- Subcutaeous infrapatellar
Name the three compartments of the leg
- Anterior
- Lateral
- Posterior
Name the four muscles of the anterior compartment
- Tibialis anterior
- Extensor digitorum longus
- Extensor hallicus longus
- Fibularis tertius
What are the actions of the anterior compartment muscles of the leg?
Dorsiflexion of the ankle and extension of the toes
Name the two branches of the common fibular nerve
Superficial and deep fibular
What is the innervation of the anterior compartment muscles of the leg?
Deep fibular n.
What is the blood supply to the anterior leg?
Anterior tibial artery
Name the muscles of the lateral compartment of the leg
- Fibularis longus
- Fibularis brevis
What are the actions of the lateral muscles of the leg?
- Eversion of the foot
- Weak plantarflexion
What is the innervation of the lateral compartment of the leg?
Superficial fibular n.
What type of joint is the ankle joint?
Synovial hinge
Name the articular surfaces of the ankle
Distal end of the tibia and fibula and the superior part of the talus bone
When is the malleolar grip strongest?
During dorsiflexion of the ankle joint
When is the ankle joint most unstable?
During plantarflexion of the ankle
Name the ligaments of the ankle joint
- Medial
- Lateral
- Calcaneofibular
Which muscles dorsiflex the ankle?
Anterior compartment:
- Tibialis anterior
- Fibularis tertius
- Extensor hallicus longus
- Extensor digitorum longus
Which muscles plantarflex the ankle?
Posterior Compartment:
- Gatrocnemius
- Soleus
- Plantoris
- Flexor hallicus longus
- Flexor digitorum longus
- Tibialis posterior
What type of joint is the superior tibio-fibular joint?
Plane
What type of joint is the inferior tibio-fibular joint?
Fibrous
Which structures make up the borders of the popliteal fossa?
- Upper medial border: semimembranous/ semitendinous
- Upper lateral border: biceps femoris
- Inferior border: lateral and medial heads of gastrocnemius
Name the contents of the popliteal fossa
- Fat
- Popliteal artery
- Popliteal vein
- Tibial nerve
- Common fibular nerve
- Popliteal lymph nodes and lymphatic nodes
What is the innervation of gastrocnemius?
Tibial nerve (S1-2)
What is the action of plantaris?
Proprioception
Which nerve innervates the muscles in the posterior compartment of the leg?
Tibial nerve
Which branch of the popliteal artery supplies the posterior compartment of the leg?
Posterior tibial artery
Name the deep muscles in the posterior compartment of the leg
- Popliteus
- Tibialis posterior
- Flexor digitorum longus
- Flexor hallicus longus
What is the deep fascia of the foot called?
Plantar fascia
Name the muscles in the first layer of the foot
- Abductor digiti minimi
- Abductor hallucis
- Flexor digitorum brevis
Name the muscles in the second layer of the foot
- Quadratus plantae
- Flexus hallucis longus
Name the terminal branches of the tibial nerve
Medial and lateral plantar nerves
Name the terminal branches of the posterior tibial artery
Lateral and medial plantar arteries
Name the muscles in the 3rd layer of the foot
- Flexor digit minimi brevis
- Adductor hallucis (oblique and transverse)
- Flexor hallucis brevis
- Abductor hallucis
Name the muscles in the 4th layer of the foot
- Dorsal interossei
- Plantar interossei
What is the function of the plantar interossei?
Adduction of the digits
What is the action of the dorsal interossei?
Abduction of the digits
Name the passive factors which maintain the integrity of the arches of the foot
- Shape of the bones
- Plantar aponeurosis
- Long plantar ligament
- Short plantar ligament
Name the dynamic factors which maintain the integrity of the arch of the foot
- Intrinsic muscles of the foot
- Long flexor tendons
- Tendon of tibialis anterior and fibularis longus
What is the blood supply to the femoral head?
-Medial and lateral femoral circumflex
What are the functions of meniscii of the knee?
- Load transmission
- Stability
- Proprioception
- Shock absorption
Name the invertors of the foot
- Tibialis anterior
- Tibialis posterior
Name the evertors of the foot
- Fibularis lonus
- Fibularis brevis