Dissection 1- Anterior and Medial Thigh Flashcards
Deep to which structure is the femoral triangle?
Fascia
Where in the thigh is the femoral triangle found?
Anterosuperior third
What is the femoral triangle inferior to?
Inguinal Ligament
What is the superior border of the femoral triangle?
Inguinal Ligament
What is the medial border of the femoral triangle?
Adductor Longus
What is the lateral border of the femoral triangle?
Sartorius
What forms the floor of the femoral triangle laterally?
Iliopsoas
What forms the floor of the femoral triangle medially?
Pectineus
What 4 features make up the roof of the femoral triangle?
Fascia Lata Cribiform Fascia Subcutaneous Tissue Skin
From lateral to medial, what are the contents of the femoral triangle?
Femoral nerve Femoral artery Femoral vein Femoral canal
What does the femoral canal contain?
Deep inguinal lymph nodes and adipose tissue
Where is the site of femoral hernia formation?
Femoral canal
What branches off the femoral vein within the femoral triangle?
Great saphenous vein
What makes up the contents of a femoral hernia?
Peritoneum +/- abdominal contents
What actually causes a femoral hernia?
Increased intra-abdominal pressure
Superficial lymphatic vessels of the lower limb follow what other anatomical structure(s)?
Great and small saphenous veins
Deep lymphatic vessels of the lower limb follow what other anatomical structure(s)?
Deep veins
Give the names of the 5 main deep veins in the lower limb?
Anterior/Posterior tibial vein Fibular vein Popliteal vein Profunda femoris vein Femoral vein
Lymph which follows the great saphenous vein will pass through which group(s) of lymph nodes to end up where?
Superficial inguinal nodes –> External iliac nodes
Can lymph pass from superficial to deep?
Yes
Lymph which follows the small saphenous vein will pass through which group(s) of lymph nodes to end up where?
Popliteal nodes –> Deep inguinal nodes –> External iliac nodes
Lymph which follows the deep veins will pass through which group(s) of lymph nodes to end up where?
Popliteal nodes –> Deep inguinal nodes –> External iliac nodes
Where will all lymph from the lower limb eventually end up?
External iliac nodes
What are the muscles of the anterior compartment of the thigh?
Pectineus Iliopsoas Sartorius Quadriceps femoris
What muscles make up the quadriceps femoris?
Rectus femoris Vastus lateralis Vastus intermedius Vastus medialis
Which muscle of the anterior compartment of the thigh is a flat, quadrangular muscle?
Pectineus
The iliopsoas is the chief of what movement?
Flexor of the hip
What two muscles make up the iliopsoas?
Iliacus and Psoas Major
Which muscle of the anterior thigh compartment is a long, ribbon like muscle?
Sartorius
Which muscle is the most superficial of the anterior compartment of the thigh?
Sartorius
What is the main movement of the quadriceps femoris?
Extension of the knee
What are the 2 main roles of the muscles of the anterior compartment of the thigh?
Flexion of hip Extension of knee
Which compartment of the thigh do the femoral artery/vein/nerve pass through?
Anterior
What structure could a fracture of the mid-shaft of the femur damage?
Profunda femoris artery
What is the proximal attachment of the iliacus?
Iliac fossa
What is the proximal attachment of the psoas major?
Lumbar transverse processes and intervertebral discs
What is the distal attachment of the iliopsoas?
Lesser trochanter of femur
What is the action of the iliopsoas?
Hip flexion
What is the nerve supply to the iliopsoas?
Anterior rami of lumbar spinal nerves (L1, 2, 3)
What is the proximal attachment of the sartorius?
ASIS
What is the distal attachment of the sartorius?
Medial surface of proximal tibia
What are the two actions of the sartorius?
Hip and knee flexion
What is the nerve supply to the sartorius?
Femoral nerve
What is the proximal attachment of the rectus femoris?
ASIS
What is the proximal attachment of the quadriceps (with the exception of rectus femoris)?
Shaft of femur
What are the distal attachments of the quadriceps femoris?
Patella (via quadriceps tendon) and tibial tuberosity (via patellar tendon)
What minor movement does the rectus femoris allow?
Weak flexion of the hip
What is the nerve supply to the quadriceps femoris?
Femoral nerve
What is the medial compartment of the thigh also known as?
Adductor group
What primarily innervates the medial compartment of the thigh?
Obturator nerve
What muscles are part of the medial compartment of the thigh?
Adductor longus Adductor brevis Adductor magnus Gracilis Obturator externis
What is the most anterior muscle in the medial compartment of the thigh?
Adductor longus
Where is the adductor brevis found?
Deep to the pectineus and adductor longus
Which is the longest adductor muscle of the medial thigh compartment?
Adductor magnus
What are the 2 parts of the adductor magnus?
Hamstring and adductor
What is a long, strap like muscle, lying along the medial side of the thigh and knee?
Gracilis
What is a deeply placed, fan shaped muscle in the superomedial thigh?
Obturator externis
What nerve innervates the majority of the medial compartment of the thigh?
Obturator nerve (L2-L4)
What is the exception, not being innervated by the obturator nerve in the medial compartment of the thigh? What innervates it instead?
Hamstring part of the adductor magnus, innervated by the tibial nerve
What structure do the obturator nerve/artery/vein enter the medial compartment of the thigh via?
Obturator foramen in the hip joint
What two branches does the obturator nerve split into?
Anterior and posterior branches
Where does the obturator nerve divide?
Upper border of adductor brevis
What is the proximal attachment of the adductor longus?
Body of pubis
What is the distal attachment of the adductor longus?
Linea aspera of femur
What is the action of the adductor longus?
Hip adduction
Where is the proximal attachment of the adductor brevis?
Body and inferior rami of pubis
Where is the distal attachment of the adductor brevis?
Pectineal line and linea aspera of femur
What are the major and minor roles of the adductor brevis?
Major = adducts hip Minor = flexes hip
What is the proximal attachment of the adductor part of the adductor magnus?
Inferior rami of pubis
What is the distal attachment of the adductor part of the adductor magnus?
Gluteal tuberosity and linea aspera of femur
What is the distal attachment of the hamstring part of the adductor magnus?
Adductor tubercle of femur
What is the proximal attachment of the hamstring part of the adductor magnus?
Ischial tuberosity
What is the main action of the adductor magnus? What are the extra actions of both parts?
Hip adduction Hamstring = extension of hip Adductor = flexion of hip
What is the proximal attachment of the gracilis?
Body and inferior rami of pubis
What is the distal attachment of the gracilis?
Medial surface of tibia
What are the main and minor actions of the gracilis?
Hip adduction and knee flexion
What is the proximal attachment of the obturator externis?
Obturator foramen/membrane
What is the distal attachment of the obturator externis?
Trochanter fossa of femur
What is the action of the obturator externis?
Lateral rotation of hip
What structures are enveloped by the femoral sheath?
Femoral artery and vein
Where is the femoral nerve formed?
Lumbar plexus
What nerve branches from the femoral nerve? Which two muscles does it pass between?
Saphenous nerve, between sartorius and gracilis
What does the saphenous nerve supply sensation to?
Fascia and skin of the anteromedial aspects of knee and leg Medial aspect of foot
Where does the femoral canal lie in relation to the femoral sheath?
Medial
Where do the medial and lateral circumflex arteries supply blood to?
Head of the femur
What are the branches of the circumflex arteries known as?
Retinacular branches
Where do the retinactular branches pass in relation to the femoral neck to reach the head?
Superior
Where do the medial and lateral circumflex arteries emerge from?
Profunda femoris artery
Where does the inguinal ligament run between?
ASIS and pubic tubercle
The inguinal canal contains what in males and what in females?
Males = spermatic cord Females = round ligament
What 3 things enter the lower limb by passing deep to the inguinal ligament in the retroingiunal space?
Femoral vessels, nerve and iliopsoas muscle
What two structures can the inguinal ligament be palpated between?
External oblique aponeurosis and fascia lata
What 3 nerves supply sensation to the thigh?
Anterior cutaneous nerve of the thigh Lateral cutaneous nerve of the thigh Cutaneous branch of the obturator nerve
The anterior cutaneous nerve of the thigh is a branch of what?
Femoral nerve (L2-L4)
The lateral cutaneous nerve of the thigh is a branch of what?
Lumbosacral plexus (L2-L3)
What is the proximal attachment of the pectineus?
Pectineal line of pubic bone
What is the distal attachment of the pectineus?
Linea aspera and pectineal line of femur
What innervates the pectineal muscle?
Femoral and obturator nerves
What are the roles of the pectineus?
Flexes, internally rotates and adducts thigh
Stabilises hip
What are the nerve root values of the femoral nerve?
L2-4