Lower Limb 1 Flashcards
Which superficial vein of the lower limb ascends anterior to the medial malleolus of the tibia
The great saphenous
Which superficial vein of the lower limb ascends posterior to the medial malleolus
The small saphenous
Where does the great saphenous vein empty blood into
The femoral vein
Which vessel does the small saphenous vein empty into
The popliteal vein
Where do the lymphatic vessels accompanying the great saphenous vein end
Superficial inguinal lymph nodes
Where do the lymphatic vessels accompanying the small saphenous vein end
Popliteal lymph nodes
What is the dermatome for the medial knee
L3
What is the dermatome of the little toe
S1
What is the name of the structure that deepens the acetabelar cavity
Acetabelar labrum
Name the main ligaments of the hip joint
- The ileofemoral ligament
- The pubofemoral ligament
- The ischiofemoral ligament
Which ligament prevents Hyperextension of the hip joint
The iliofemoral ligament
Which ligament prevents hyperabduction of the hip joint
The pubofemoral ligament
Which hip ligament is Y-shaped
Ileofemoral
Chief flexor of the thigh
Iliopsoas muscle - psoas major and iliacus
What is the main extensor of the hip joint
Gluteus maximus (strong when standing from a sitting position and also climbing stairs, but is relatively inactive during normal walking)
Name the 3 bones of the hip
Ilium, ischium and pubis
Name the ligaments that connect the sacrum to the pelvis
Sacrospinal ligament and sacrotuberal ligament
Describe the path of the pudendal nerve to the perineum
Between the pelvic cavity and perineum by passing first through the greater sciatic foramen to enter the gluteal region and then immediately pass through the lesser foramen to enter the perineum
Action of the piriformis
- abduction of the femur when flexed
- lateral rotation of the femur when extended
Action of the obturator internus
- abduction of the femur when flexed
- lateral rotation of the femur when extended
Action of the gemelli
- abduction of the femur when flexed
- lateral rotation of the femur when extended
What is the trendelenburg sign
When asked to stand on one leg unsupported the opposite pelvic brim drops. Indicates possible damage to the superior gluteal nerve supplying gluteus minimus and medius
Action of gluteus minimus and medius
- Abduct femur at hip joint
- secure pelvis over stance leg to prevent opposite side dropping when walking
- medially rotates thigh
What is the action of the quadratus femoris
Laterally rotates femur at hip joint
Which nerve supplies the gluteus minimus and medius
The superior gluteal nerve
Name the most superficial and largest muscle of the gluteal region
The gluteus maximus
Where do the abductors of the thigh attach
The deep gluteal muscles attach to the greater trochanter of the femur
Name the abductors of the thigh
- piriformis
- obturator internus
- gemelli - superior and inferior
- gluteus medius and minimus
Lateral (external) rotators of the femur
Gluteus minimus, gluteus medius, piriformis, obturator internus, gemelli superior and inferior and the quadratus femoris
Action of the gluteus maximus
Extends the flexed thigh at the hip joint and stabilises the knee and hip joint through insertion into iliotibial tract
Where does the tensor fasciae latae originate
The outer margin of the iliac crest from the anterior superior iliac spine to approximately the tuberculum of iliac crest
What is the action of the tensor fasciae latae
Stabilizes the knee in extension and stabilises the hip joint by holding head of femur in the acetabulum
Innervation of the tensor fasciae latae
The superior gluteal nerve
Innervation of the gluteus maximus
Inferior gluteal nerve
Name the 4 heads of the quadratus femoris
- rectus femoris
- vastus lateralis
- vastus medialis
- vastus intermedius
Which nerve innervates the quadriceps femoris
The femoral nerve
What is the action of the rectus femoris on the hip joint
Flexion –> the kicking muscle
What do the 4 tendons of the quadriceps femoris unite to form
The quadriceps tendon proximal to the patella which continues as the patellar ligament distal to the patella to its attachment on the tibia
Where does the patellar ligament attach to the tibia
The tibial tuberosity
What is the action of the quadriceps femoris
Parts of the muscle group are hip flexors but majority are knee extensors
What is the most superficial muscle of the anterior thigh
The sartorius muscle
Wash are the actions of the sartorius on the hip joint
- Flexion
- abduction
- lateral rotation
- flexion of the leg at the knee joint
Which nerve innervates the medial thigh muscles
The obturator nerve
Through which bony foramen does the nerve that innervates the medial thigh muscles enter the thigh
The obturator foramen
Which structures pass through the adductor hiatus
Femoral artery and vein
Which artery is the femoral artery a continuation of
The external iliac
Where can you locate the femoral artery
Midway between the ASIS and pubic symphysis
Name the large branch of the femoral artery which passes posteriorly towards the hamstrings
The profunda femoris
The femoral vein is a continuation of which vein
The popliteal vein
Name the muscles supplied by the femoral nerve
- The sartorius
- The pectineus
- The iliacus
- The quadriceps femoris
Which structure forms the base of the femoral triangle
The inguinal ligament
Medial boundary of the femoral triangle
The adductor longus
Lateral boundary of the femoral triangle
The sartorius muscle
Identity the structures that can be located in the femoral triangle
Femoral nerve, femoral artery, femoral vein and femoral canal (contains lymph nodes)
What structures are enclosed in the femoral sheath
The femoral artery, femoral vein and lymph nodes
Are femoral hernias more common in males of females
Females
Name the 2 superficial veins of the lower limb
Great saphenous and small saphenous
What structures exit via the greater sciatic foramen
- Piriformis
- gluteal nerves superior and inferior
- sciatic foramen
- pudendal nerve
Root value of the sacral plexus?
L4-S4
Proximal origin of the hamstring muscles
Ischial tuberosity
Most lateral hamstring muscle
Biceps femoris
Distal attachment of the biceps femoris
head of fibula and lateral condyle of fibula
What does the silastic nerve split into around the popliteal fossa
Tibial nerve (medial) Common fibular nerve (lateral)
What is the inguinal ligament a continuation of
The external oblique muscle
Main flexor of the hip joint
Iliopsoas
Which nerve supplies the medial compartment of the thing
L2, L3, L4 - obturator nerve
Innervation of the pectineus
Obturator and femoral nerve
What is the main artery to the femoral head
Medial circumflex artery
What structures exit via the greater sciatic foramen
- Piriformis
- gluteal nerves superior and inferior
- sciatic foramen
- pudendal nerve
Root value of the sacral plexus?
?
Proximal origin of the hamstring muscles
Ischial tuberosity
Most lateral hamstring muscle
Biceps femoris
Distal attachment of the biceps femoris
…
What does the silastic nerve split into around the popliteal fossa
Tibial nerve (medial) Common fibular nerve (lateral)
What is the inguinal ligament a continuation of
The external oblique muscle
Main flexor of the hip joint
Iliopsoas
Which nerve supplies the medial compartment of the thing
L2, L3, L4 - obturator nerve
Innervation of the pectineus
Obturator and femoral nerve
What is the main artery to the femoral head
Medial circumflex artery
What structures exit via the greater sciatic foramen
- Piriformis
- gluteal nerves superior and inferior
- sciatic foramen
- pudendal nerve
Root value of the lumbar plexus?
Anterior rami of L1-L4
Proximal origin of the hamstring muscles
Ischial tuberosity
Most lateral hamstring muscle
Biceps femoris
Distal attachment of the biceps femoris
…
What does the silastic nerve split into around the popliteal fossa
Tibial nerve (medial) Common fibular nerve (lateral)
What is the inguinal ligament a continuation of
The external oblique muscle
Main flexor of the hip joint
Iliopsoas
Which nerve supplies the medial compartment of the thing
L2, L3, L4 - obturator nerve
Innervation of the pectineus
Obturator and femoral nerve
What is the main artery to the femoral head
Medial circumflex artery
Root value of the sacral plexus
Ventral rami of L4, L5 S1, S2, S3 and S4
What are the 2 main branches of the lumbar plexus
Obturator and femoral nerve
Which compartments of the thigh are innervated by
1) obturator
2) femoral
1) medial
2) anterior
Root value of the obturator nerve
L2-L4
Root value of the femoral nerve
L2-L4
Path of the femoral nerve
Emerges from lateral border of psoas major and innervates the iliacus and passes deep to the inguinal ligament to the anterior thigh supplying the flexors of knee and extensors of the hip
Path of the obturator nerve
Emerges from the medial border of the psoas major and passes through the pelvis (obturator foramen) to the medial thigh, supplying adductor muscles
Superficial muscles of gluteal region
Gluteus maximus, medius and minimis
Deep muscles of the gluteal region
Piriformis, obturator internus, superior and inferior gemelli, quadratus femoris
Muscles attaching to the iliotibial tract
Gluteus maximus and tensor fasciae latae
The roots of the sacral plexus are anterior to which posterior muscle
Piriformis
2 main branches of the sacral plexus
The sciatic and pudendal nerves
What is the lumbosacral trunk formed by
Union of L4 and L5 - passes over the wing of sacrum to participate in the formation of the sacral plexus along with ventral rami of S1-S4
Root value of the superior gluteal nerve
L4-S1
Root value of the inferior gluteal nerve
L5-S2
Where does the sciatic nerve bifurcate
The apex of the popliteal fossa
What are the 2 main divisions of the sciatic nerve
Tibial nerve and common fibular
Does the sciatic nerve supply any muscles in the gluteal region
?
Which is the most lateral hamstring muscle
Biceps femoris
What is the common action of all the hamstrings
- flexion of the knee joint
- extension of thigh at hip
Which hamstring muscle laterally rotates the hip and knee
Biceps femoris
Which hamstring muscles medially rotate the hip and knee
The semimemranosous and semitendinosus
What is the distal attachment of the medial hamstring muscles
Semimembranosus to medial epicondyle of tibia and semitendinosus to medial surface of tibia
What is the proximal attachment/origin of the semitendinosus
Which other muscle also attaches here
Ischial tuberosity of the pelvis
Biceps femoris (long head of)
What is the distal attachment of the biceps femoris
The lateral
Name the origin of the biceps femoris (long and short head)
Long head is ischial tuberosity of the pelvis
Short head is posterior femur (linea aspera)
Innervation of the biceps femoris
Sciatic nerve
- tibial division supplies long head
- common fibular supplies short head
What actions are possible at the knee joint
Flexion and extension
And small active and passive rotation movements can occur
What kind of joint is the knee joint
Compound synovial hinge
Which bones articulate at the knee joint
- femur and tibia
- patella and femur
Which is the most important muscle which helps stabilise the knee joint
Quadriceps femoris
Name the ligament which extends from the lateral epicondyle of the femur to the lateral surface of the head of the fibula
Lateral (fibular) collateral ligament
Name the ligament which extends from the median epicondyle of the femur to the medial surface of the tibia
Medial (tibial) collateral ligament
Which tendon separates the lateral collateral ligament of the knee from the lateral meniscus
The popliteus muscle tendon
What is the medial collateral ligament of the knee attached to medially
The medial meniscus
Role of the anterior cruciate ligament
Prevents femur sliding posteriorly and prevents hyperextension of the knee joint
Role of the posterior cruciate ligament
Prevents femur from sliding anteriorly on the tibia
What are the menisci
C shaped plates of fibrocartilage on the articular surface of tibia
What are the function of the menisci
Deepen surface and shock absorption
What is the unhappy triad caused by a lateral impact to the knee
- puts load on he medial collateral ligament which is attached to the medial meniscus and both tear
- this puts load upon the ACL which then tears
Muscles which flex the knee
- hamstrings - semimembranosus, semitendinosus, biceps femoris
- sartorius
- gracilis
- popliteus
Muscles which extend the knee
Quadriceps femoris - vastus medialis, vastus intermedialis, vastus laeteralis, rectus femoris
Lateral rotation of the knee
Biceps femoris
Can only occur when knee is flexed; when knee is not flexed medial/lateral rotation occurs at the hip joint
Medial rotation of the knee
Semimembranosis, semitendinosus, gracilis, sartorius and popliteus
Can only occur when knee is flexed; when knee is not flexed medial/lateral rotation occurs at the hip joint
Which muscle tendon does the patella attach to
Quadriceps femoris
Which type of cartilage are the menisci comprised of
Fibrocartilage
Describe the attachments of the anterior cruciate
Anterior tibia to posterior femur
Describe the attachments of the posterior cruciate
Attaches to the posterior intercondylar region of the tibia, and ascends anteriorly to attach to the femur in the intercondylar fossa
Housemaids knee affects which structure
Prepatellar bursitis - caused by the friction between the skin and the patella. The bursa may distend and form a swelling in front of the knee
Which bursa communicates with the articular cavity of the knee joint
Suprapatellar bursa
Suprapatellar bursa communicating with the articular cavity of knee joint significance
??
Root values of the femoral nerve
L2,L3,L4
Action of the psoas major on the vertebral collumn
Flexion
Segmental value of obturator nerve
L2, L3, L4
Iliopsoas distal attachment
Lesser trochanter of femur
Function of iliofemoral ligament
Prevents hyperextension of hip joint