lecture 2 - lower limb bones/joints Flashcards
What are the 4 regions of the lower limb?
Gluteal, thigh, leg, foot
What are the bones of the lower limb?
Sacrum, coccyx, hip bone (ilium, ischium, pubis), femur, patella, tibia, fibula, tarsals, metatarsals, phalanges
What bones make up the pelvis?
Ilium, ischium pubis
What bones are found in the gluteal region?
Sacrum, coccyx, hip (ilium, ischium, pubis)
What bones are found in the thigh region?
Femur, patella
What part of the hip bone does the femur articulate with?
The acetabulum
What covers the obturator foramen?
Obturator membrane
What is the name for the gap in the obturator membrane?
Obturator canal
What is the joint between the pubis of the left and right hip bones?
The pubic symphysis
What type of joint is the sacroiliac joint?
Ventrally synovial, dorsally fibrous
Why is the sacroiliac joint fibrous on the dorsal aspect?
It has the strong interosseous ligament
What are the ligaments of the sacroiliac joints?
Interosseous sacroiliac, posterior sacroiliac, anterior sacroiliac
What is the deep ligament os the sacroiliac joint?
Interosseous sacroiliac ligament
What type of joint is the pubic symphysis?
Fibrocartilaginous
What are the ligaments at the pubic symphysis?
Superior pubic, inferior pubic
What is the space that sits superior to the sacrospinous ligament?
The greater sciatic foramen
What is the space thats sits inferior to the sacrospinous ligament?
Lesser sciatic foramen
What ligament joins the anterior superior iliac spine to the pubic tubercle?
The inguinal ligament
What is the ligament between the sacrum and the ischial spine?
Sacrospinous ligament
What is the ligament between the sacrum and the ischial tuberosity?
Sacrotuberous ligament
What class of joint is the hip joint?
Synovial ball & socket
What are the bony components of the hip joint?
Head of the femur, acetabulum of the pelvic bone
What is the function of the acetabular labrum?
Increases shock absorption and mobility of the hip joint
What movements are possible at the hip joint?
Flexion, extension, abduction, adduction, medial & lateral rotation, circumduction
What is the name for the prominence between the the greater and lesser trochanter on the anterior surface?
Intertrochanteric line
What is the name for the prominence between the the greater and lesser trochanter on the posterior surface?
Intertrochanteric crest
What is the function of the acetabular labrum?
Increases boney congruence (depth of the socket)
What is the name for the indentation on the head of the femur where the ligament attaches>
Fovea
What ligament crosses the acetabulum to stabilise the hip joint?
Transverse acetabular ligament
What ligament attaches the fovea to the acetabulum?
The ligament of the head of the femur
What vessel supplies the ligament of the head of the femur?
The artery of the ligament of the head of the femur
What are the arterial branches of the obturator artery that eventually supply the head of the femur?
Obturator artery -> acetabular branch of the obturator artery -> artery of the ligament of the head of the femur
What structure surrounds the ligament of the head of the femur?
Synovial sleeve
What are the 3 capsular ligaments of the hip joint?
Iliofemoral, ishiofemoral, pubofemoral
Where do the capsular ligaments of the hip attach to the hip bone?
Edges of the acetabulum
Where do the capsular ligaments of the hip attach to the femur?
anteriorly to intertrochanteric line, posteriorly to neck
What movements are stabilised by the iliofemoral ligament?
extension, external rotation, adduction at the hip
What movements are stabilised by the ishiofemoral ligament?
Extension, internal rotation, abduction at the hip
What movements are stabilised by the pubofemoral ligament?
Extension, external rotation, abduction
What are the 3 key blood supplies to the hip joint?
medial & lateral circumflex femoral arteries, artery of head of femur, medullary vessels
Where do the medial & lateral circumflex femoral arteries arise?
Deep femoral artery, which is a branch of the femoral artery
During which stage of development is the femur supplied by medullary vessels?
After the fusion of epiphysis
What are the 2 classes of hip joint fracture in terms of location?
Extracapsular, intracapsular
What are the 2 types of extracapsular fracture of the hip joint?
trochanteric, sub-trochanteric
Where do intracapsular fractures of the hip joint usually occur?
The neck of the femur
What class of joint is the knee joint?
Synovial, condylar
What part of the femur articulates at the knee joint?
Femoral condyles (medial & lateral)
What part of the tibia articulates at the knee joint?
Tibial condyles (medial & lateral)
What bone does the patella articulate with?
Femur (patello-femoral joint)
What type of bone is the patella?
Sesamoid
What feature of the knee joint increases congruency and absorbs shock?
Menisci (lateral & medial)
What movements are possible at the knee?
Flexion/extension, rotation of flexed knee
What part of the tibia sits between the femoral condyles?
The intercondylar eminence
What are the menisci?
C-shaped Fibrocartilage that sits between the femur and tibia at the knee joint to increase congruency, absorb shock, and distribute axial load
What are the 2 key types of knee joint stabilising ligaments?
Cruciate ligaments, collateral ligaments
What are the 2 cruciate ligaments?
Anterior cruciate ligament (ACL), Posterior cruciate ligament (PCL)
What are the 2 knee collateral ligaments?
Medial collateral ligament (MCL), lateral collateral ligament (LCL)
What tendon stabilises the knee joint?
Popliteal tendon
What ligament stabilises the knee and attaches the patella to the tibia?
The patella ligament
What are the attachments of the anterior cruciate ligament?
Anterior tibial intercondylar eminence to lateral condyle of femur
What are the attachments of the Posterior Cruciate Ligament (PCL)?
posterior of tibial intercondylar eminence to medial condyle of femur
What is the role of the ACL?
Prevent anterior displacement of tibia
What is the role of the PCL?
Prevent posterior displacement of the tibia
What are the attachments of the medial collateral ligament (MCL)?
medial femoral condyle and medial surface of tibia
What are the attachments of the lateral collateral ligament?
lateral femoral epicondyle and head of fibula
What is the function of the MCL?
prevent valgus force/abduction(lateral movement)
What cartilaginous structure does the MCL attach to?
medial meniscus
Which collateral ligament attaches to a meniscus?
Medial Collateral ligament - attaches to the medial meniscus
What is the function of the Lateral Collateral Ligament?
Prevent varus force/adduction
What are bursae?
Fluid-filled sacs that cushion joints
Which of the bursae of the knee communicates with the joint cavity?
Suprapatellar bursa
Which bursa sits deep to the patella?
Suprapatellar bursa
Which structure sits superficial to the patella to provide cushioning?
Prepatellar bursa
Which bursae sit inferior to the patella?
Infrapatella bursa (superficial & deep)
What bones does the tibia articulate with?
Femur, talus, fibula
What bones does the fibula articulate with?
Tibia, talus
What joints connect the tibia and fibula?
Superior & inferior tibiofibular joints
What membrane joins the tibia fibula?
Interosseous membrane
What is the function of the interosseous membrane between the tibia and fibula?
Holds tibia & fibula together, muscle attachment, force transmission, compartment seperation
Which ligaments support the posterior tibiofibular ligament?
Anterior & posterior tibiofibular ligament
How many tarsal bones are there?
7
How many metatarsals are there?
5
How many phalanges are there in the foot?
14
What are the bones in the tarsal group?
calcaneous, talus, cuboid, navicular, cuneiforms (medial, intermediate, lateral)
Is the cuboid found on the lateral or medial side of the foot?
Lateral
Is the navicular found on the medial or lateral side of the foot?
Medial
Which toe is the 1st metatarsal of?
Great toe
How many phalanges does each toe have?
3 on each, 2 on great toe (14 total)
What is the alternative name for the ankle joint?
Talocrural joint
What class is the ankle/talocrural joint?
synovial, hinge joint
What are the 3 bones involved in the ankle joint?
Talus, tibia, fibula
What part of the fibula articulates at the ankle joint?
lateral malleolus
What parts of the tibia articulate at the ankle joint?
Distal end AND medial malleolus
What part of the talus articulates at the ankle joint?
Trochlear surface
What movements are possible at the ankle joint?
Dorsiflexion (flexion), plantarflexion (extension)
What are the bones of the subtalar joint?
Talus, calcaneous
What movments are possible at the subtalar joint?
inversion (adduction) & eversion (inversion)
What class is the subtalar joint?
Synovial, modified multi-axial
What is the function of the medial/deltoid ligament of the ankle?
Prevent valgus force/abduction
What is the function of the lateral ligament of the ankle?
Prevent varus force/adduction
What are the 4 types of joint in thre foot?
Intertarsal, tarsometatarsal, metatarsophalangeal, interphalangeal
What class are intertarsal joints?
Plane synovial
What class are tarsometatarsal joints?
Plane synovial
What class are metatarsophalangeal joints?
Ellipsoid
What class are interphalangeal joints?
Hinge
What are the 3 arches of the foot?
Transverse, medial longitudinal, lateral longitudinal
What ligaments support the arches of the feet?
Plantar calcaneonavicular ligament (spring ligament), short plantar ligament, long plantar ligament, plantar aponeurosis
What is the name for a presentation of high arches of the feet?
Pes cavus
What is the name for a presentation of flat arches of the feet?
Pes planus