Anatomy: Lower Limb (Dissection) Flashcards
what makes up the superior border of the femoral triangle?
inguinal ligament
what makes up the lateral border of the femoral triangle?
sartorius
what makes up the medial border of the femoral triangle?
adductor longus
what muscles make up the floor of the femoral triangle?
iliopsoas laterally
pectineus medially
what are the contents of the femoral triangle?
femoral nerve, artery vein
femoral canal
what is contained in the femoral canal?
the deep inguinal lymph nodes
what is the femoral sheath?
a short tube of transversalis and iliopsoas fascia from the abdominal wall
what is found in the femoral sheath?
the femoral artery and vein
where is the femoral nerve located relative to the femoral sheath?
laterally to the sheath
what is the femoral nerve made from?
L2, L3 and L4
where is the femoral nerve formed?
in the lumbar plexus
name a branch of the femoral nerve?
the saphenous nerve
where does the saphenous nerve leave the adductor canal?
distally
between sartorius and gracilis
what does the saphenous nerve supply?
the fascia and skin of the anteromedial knee and leg
the medial aspect of the foot
what is found in the femoral canal?
deep inguinal lymph nodes and adipose tissue
what forms the medial part of the femoral sheath?
the femoral canal
what artery do the circumflex femoral arteries arise from?
the profunda femoris artery
what is the inguinal ligament?
the inferior border of the external oblique aponeurosis
where does the inguinal ligament run?
between the ASIS and the pubic tubercle
what do the muscles of the anterior thigh act to do?
flex the hip
extend the knee
name the muscles of the anterior thigh
pectineus
iliopsoas
sartorius
quadriceps femoris
what muscles are included in the quadriceps femoris?
rectus femoris
vastus lateralis
vastus intermedius
vastus medius
what are the attachments of the iliopsoas?
proximal = iliac fossa and lumbar transverse processes
distal = lesser trochanter of femur
what are the attachments of the sartorius/
proximal = ASIS
distal = medial surface of proximal tibia
what muscle of the quadriceps femoris has a different proximal attachment and where is it?
rectus femoris
ASIS
what are the attachments of the quadriceps femoris?
proximal = shaft of femur
distal = patella then tibial tuberosity
what supplies most of the muscles of the anterior thigh?
femoral nerve
what are the muscles of the medial thigh?
gracilis
adductor brevis
adductor longus
adductor magnus
what are the parts of the adductor magnus?
adductor part
hamstring part
what is the most medial muscle of the medial thigh?
gracilis
where does the gracilis insert?
the superomedial aspect of the tibia
which muscles lie anterior to adductor magnus?
adductor brevis
adductor longus
which muscle lies superior to adductor longus?
adductor brevis
where do the adductors attach proximally?
pubis
ischiopubic remis
ischial tuberosity
where do the adductors attach distally?
posterior surface of the shaft of the femur
adductor tubercle of the femur
what nerve supplies most of the muscles of the medial thigh and which is the exception?
obturator nerve
hamstring part of adductor magnus (tibial nerve)
where does the obturator nerve enter the medial thigh?
via the obturator foramen of the hip bone
where does the obturator nerve divide?
upper border of adductor brevis
into anterior and posterior branches
where is the anterior branch of the obturator nerve located?
between adductors longus and brevis
what does lymph from superficial structures in the lower limbs follow?
the saphenous veins
describe lymph drainage of lymph following the great saphenous vein
superficial inguinal lymph nodes
THEN
external iliac nodes
describe lymph drainage of lymph following the small saphenous vein
popliteal lymph nodes
THEN
deep inguinal nodes
THEN
external iliac nodes
what are the five joints found in the foot?
subtalar midtarsal tarsometatarsal MTP interphalangeal
where is the subtalar joint located?
between the talus and the calcaneus
what two joints are midtarsal joints?
calcaneocuboid
talocalcaneonavicular
what type of joint is a midtarsal joint?
synovial
what movements can occur at the midtarsal joints?
inversion
eversion
what muscles are involved in inversion at the midtarsal joint?
tibialis anterior
tibialis posterior
what nerves are involved in inversion at the midtarsal joint?
tibial
deep fibular
what muscles are involved in eversion at the midtarsal joint?
fibularis muscles
what nerves are involved in eversion at the midtarsal joint?
superficial and deep fibular nerves
where are the tarsometatarsal joints located?
between the cuneiforms/cuboid and the metatarsals
what type of joints are the MTP joint?
synovial
what movements can occur at the MTP joints?
flexion, extension, abduction, adduction and circumduction of the toes
what type of joints are the interphalangeal joints of the feet?
synovial hinge joints
what movements occur at the interphalangeal joints of the toes?
flexion and extension
what type of joints are all of the joints in the feet?
synovial
what is the role of the arches of the foot?
shock absorption
push off spring in function
increased weight bearing capacity
what two things support the arches of the foot?
plantar aponeurosis
plantar ligaments
what is the plantar aponeurosis?
thickened central area of the plantar fascia on the sole of the foot
what are the three arches of the feet?
medial longitudinal
lateral longitudinal
transverse
what forms the medial longitudinal arch?
calcaneus talus navicular three cuneiforms metatarsals 1-3
what supports the medial longitudinal arch?
flexor hallucis longus
the attachments of tibialis anterior
the attachment of fibularis longus
what forms the lateral longitudinal arch?
calcaneus
cuboid
metatarsals 4-5
what forms the transverse arch?
cuboid
cuneiforms
base of all five metatarsals
what supports the transverse arch?
fibularis longus
tibialis posterior
where do the intrinsic muscles of the foot attach?
proximal and distal attachments are both inside the foot
how many layers of intrinsic muscles of the foot are there?
three
what are the arteries of the feet?
dorsalis pedis
medial plantar artery
lateral plantar artery
what branches to form the dorsalis pedus?
anterior tibial artery
where is the pulse of dorsalis pedis felt?
lateral to extensor hallucis longus tendon
what does the dorsalis pedis branch to form?
the arcuate artery on the dorsum of the foot
what are the medial and lateral plantar arteries branches of?
the posterior tibial artery
what do the medial and lateral plantar arteries contribute to?
the deep plantar arch
what arises from the deep plantar arch/arcuate artery and what do these branch into?
metatarsal arteries
branch into digital arteries
how many digital arteries supply each toe?
four
what is the main superficial vein of the foot?
dorsal venous arch
what arises from the medial dorsal venous arch?
great saphenous vein
what arises from the lateral dorsal venous arch?
small saphenous vein
what nerves supply motor nerves to the intrinsic muscles of the feet?
tibial nerve to the sole
deep fibular nerves to the dorsum
what nerve mainly supplies sensory nerves to the dorsum of the foot?
superficial fibular
what nerve mainly supplies sensory nerves to the plantar foot?
tibial
what two bones make up the hindfoot?
talus
calcaneus
what five bones make up the midfoot?
navicular
cuboid
all cuneiforms
what 19 bones make up the forefoot?
metatarsals
phalanges
what three muscles make up the superficial gluteal muscles?
gluteus maximus
gluteus medius
gluteus minimus
what is the largest gluteal muscle?
gluteus maximus
where does gluteus maximus originate?
iliac crest
sacrum
sacrotuberous ligament
coccyx
where does gluteus maximus insert?
iliotibial tract
what is the most powerful extensor of the hip?
gluteus maximus
what makes up the inferior gluteal neurovascular bundle?
inferior gluteal artery, vein and nerve
where is the inferior gluteal neurovascular bundle located?
deep to the gluteus maximus
what makes up the superior gluteal neurovascualr bundle?
superior gluteal artery, vein and nerve
where is the superior gluteal neurovascular bundle found?
deep to gluteus medius
what makes up the sciatic nerve?
L4-S3
what branch of the sciatic nerve supplies the posterior compartment of the thigh?
tibial
what are the “hamstring muscles’?
the muscles of the posterior thigh
semimembranosus, semitendinosus, biceps femoris
where does biceps femoris attach?
lateral aspect of the head of the fibula
where to semimembranosus and semitendinosus attach?
the proximal tibia
where does the artery to the head of the femur run in?
the ligament to the head of the femur
what type of joint is the knee joint?
synovial hinge
what are the three articulations involved in the knee joint?
two femorotibial
one femoropatellar
what are the five ligaments of the knee joint?
iliotibial tract MCL LCL ACL PCL
what is another name for the MCL?
tibial collateral ligament
what is another name for the LCL?
fibular collateral ligament
what are the two menisci of the knee?
medial
lateral
what is genu varum?
bow legs
what is genu valgum?
knock knees
where are the menisci thicker?
peripherally, where they attach to the fibrous capsule
what is the medial meniscus peripherally attached to?
the medial collateral ligament
what three things are involved in an “unhappy triad” knee injury?
medial collateral ligament
medial meniscus
ACL
what are the suprapatellar bursa?
extensions of the synovial cavity
what does the suprapatellar bursa do?
reduces friction on the quadriceps tendon during knee movements
what is the popliteal fossa?
the space posterior to the knee joint
what forms the superomedial boundary of the popliteal fossa?
semitendinosus
semimembranosus
what forms the superolateral boundary of the popliteal fossa?
biceps femoris
what forms the inferior border of the popliteal fossa?
medial and lateral heads of gastrocnemius
where does the small saphenous vein drain?
the popliteal vein
what is found in the neurovascular bundle in the popliteal fossa?
tibial nerve
popliteal vein
popliteal artery
what lymph nodes are found in the popliteal fossa?
popliteal lymph nodes
where does the sciatic nerve divide?
the popliteal fossa
what are the divisions of the sciatic nerve?
tibial
common fibular
what is the branch of the tibial nerve called?
the medial sural cutaneous nerve
what is the branch of the fibular nerve?
lateral sural cutaneous nerve
how do the sural cutaneous nerves communicate with each other?
through the sural communicating branch
how can the common fibular nerve be damaged?
compression against the neck of the fibula
fracture of the neck of the fibula
what provides collateral blood supply to the structure of the knee joint?
genicular anastomoses
what are the two layers of muscles of the posterior leg?
superficial
deep
what three muscles make up the superficial layer of the posterior leg?
gastrocnemius
soleus
plantaris
what four muscles make up the deep layer of the posterior leg?
popliteus
flexor hallucis longus
flexor digitorum longus
tibialis posterior
what nerve supplies the muscles of the posterior leg?
tibial nerve
what is the popliteal fossa?
space posterior to the knee joint
what forms the superomedial boundary of the popliteal fossa?
semitendonosus
semimembranosus
what forms the superolateral boundary of the popliteal fossa?
biceps femoris
what forms the inferior boundary of the popliteal fossa?
medial and lateral heads of gastrocnemius
what vessels make up the neurovascular bundle found in the popliteal fossa?
tibial nerve
popliteal vein
popliteal artery
what is the tibial nerve a branch of?
sciatic
where does the sciatic nerve divide?
superior apex of the popliteal fossa
what are the two divisions of the sciatic nerve?
tibial
common fibular
what do the sural nerve supply?
skin and fascia on the posterolateral aspect of the leg and foot
what sural nerve comes off of the tibial nerve?
medial sural cutaneous nerve
what sural nerve comes off of the common fibular nerve?
lateral sural cutaneous nerve
how do the sural cutaneous nerves communicate with each other?
via the sural communicating branch
where can the common fibular nerve become compressed?
against the neck of the fibula
what injury can cause damage to the common fibular nerve?
fracture of the fibular neck
what can be done to make palpation of the popliteal pulse easier?
flexion of the knee to around 30 degrees and relaxing the hamstring muscles
what provides collateral blood supply to the structures of the knee joint?
genicular anastamoses
what are the two layers of muscles in the posterior leg?
superficial
deep
what muscles are found in the superficial posterior leg?
gastrocnemius
soleus
plantaris
what muscles are found in the deep posterior leg?
popliteus
flexor hallucis longus
flexor digitorum longus
tibialis posterior
what movements are caused by the posterior leg muscles?
plantarflex ankles and toes
inversion of foot
what nerve supplies the muscles of the posterior leg?
tibial nerve
what are the two parts of gastrocnemius?
medial
lateral
where does gastrocnemius attach distally?
calcaneus via the achilles tendon
where does gastrocnemius attach proximally?
each head to their respective femoral condyle
what movements does gastrocnemius cause?
week knee flexion
powerful ankle plantar flexion
where does soleus attach proximally?
neck of the fibula
soleal line of the tibia
where does soleus attach distally?
calcaneus via the achilles tendon
what is the normal response when the calcaneal tendon is struck with a tendon hammer?
involuntary contraction of gastrocnemius and soleus with slight ankle plantarflexion
what are the two branches of popliteal artery and where do these arise?
anterior and posterior tibial arteries
immediately distal to the popliteal fossa
what is the fibular artery a branch of?
the posterior tibial artery