Anatomy of the lower limb Flashcards
Upper limb?
Axilla Arm/ brachium Elbow/ cubital fossa Forearm/ anti- brachium Wrist Hand
Lower limb?
Inguinal region/groin Thigh/ fermoral region Knee/Popliteal fossa Leg Ankle Foot
Where does lower limb extend from?
Pelvis
Functions of lower limb?
support body weight locomotion maintain balance
Gluteal region - superficial muscle group?
Gluteus maximus, gluteus medius, gluteus minimus, tensor fascia latae
Functions of gluteal region superficial muscle group?
Extensors, abductors and medial rotators of thigh
Innervation of gluteal region superficial muscle group?
Innervated by gluteal nerves - Gluteus maximus = inferior gluteal - All others = superior gluteal Trendelenburg’s gait
Trendelenburg’s gait?
Abnormal walking resulting from a defective hip abductor mechanism Gluteus medius and gluteus minimus muscles Weakness of these muscles causes drooping of pelvis to contralateral side
Gluteal region - deep muscle group?
Piriformis, obturator internus, gemelli and quadratus femoris
Functions of gluteal region deep muscle group?
Lateral rotators of thigh and hip stabilisers
Innervation of gluteal region deep muscle group?
Nerves from sacral plexus


Where do nerves enter/ exit pelvis and perineum?
Via greater and lesser sciatic foramen
What forms greater and lesser sciatic foramen?
Formed by the sacrotuberous and sacrospinous ligaments
When sacrotuberous and sacrospinous ligaments are not in place, what are the greater and lesser sciatic foramen called?
Gluteal region is divided into what for injections?
Quadrants
UI, UO, LI, LO


A number of nerves enter/ exit the pelvis via…?
Examples…?
Gluteal region
Sciatic nerve?
Largest in body
Supplies posterior thigh, all leg and foot muscles & most of the skin via tibial and common fibular braches
Pudendal nerve?
Posterior cutaneous nerve of thigh?
S1- S3
Supplies skin over posterior thigh, popliteal fossa, lateral perineum and upper medial thigh


Sciatic nerve?
Where does sciatic nerve usually exit?
Inferior to piriformis
Does sciatic nerve supply anything in gluteal region?
No
Where does sciatic nerve separate and into what?
Separates in distal thigh to tibial nerve and common fibular
Boundaries of femoral triangle?
Superior - inguinal ligament
Medially - adductor longus
Contents of femoral triangle?
Femoral Nerve
Femoral Artery
Femoral Vein
Lymphatics
(lateral to medial)
NAVYL




Compartment syndrome?
Fascia creates enclosed space
Increased pressure caused by swelling of tissue or increase in fluid
Affects functions of the muscles or nerves in the compartment
Can be acute or chronic
Fasciotomy to relieve pressure in emergency
3 compartments of the thigh?
3 compartments of the leg?
Anterior, posterior, lateral
Anterior compartment of thigh?
Flexors of thigh
Extensors of leg
All femoral nerve
Innervation of anterior compartment of thigh?
All femoral nerve (L2, L3, L4)
Except from psoas major - L1, L2, L3
Medial compartment of thigh?
Adductors of thigh
(Adductor longus, adductor brevis, adductor magnus, gracilis, obturator externus)
Innervation of medial compartment of thigh?
All obturator nerve (L2, L3, L4)
Except from hamstring part of adductor magnus (tibial nerve)
Posterior compartment of thigh?
Extensors of thigh and flexors of leg
(Semitendinosus, semimembranous & biceps femoris)
Innervation of posteiror compartment of thigh?
All tibial division of sciatic nerve (L5, S1, S2)
Except short head biceps femoris (common fibular division of sciatic nerve)
Anterior compartment of leg?
Innervation of anterior compartment of leg?
Deep fibular nerve (L4, L5)
Lateral compartment of leg?
Evert foot & weakly plantarflex ankle
(Fibularis longus, fibularis brevis)
Innervation of lateral compartment of leg?
All superficial fibular nerve (L5, S1, S2)
Superficial group of posterior compartment of leg?
Plantarflexors of ankle
(Gastrocnemius, soleus, plantaris)
Innervation of superficial group of posterior compartment of leg?
All tibial nerve (S1, S2)
Deep group of posterior compartment of leg?
Flexors of toes & plantarflexors of ankle
(Popliteus, flexor hallucis longus, flexor digitorum longus, tibialis posterior)
Innervation of deep group of posterior compartment of leg?
All tibial nerve
What type of joint is hip joint?
Ball and socket joint
Features of hip joint?
Synovial
Multiaxial:
- Flexion- extension
- Abduction- adduction
- Medial- lateral rotation
- Circumduction
Neck of femur fractures?
At hip joint


In hip joint what is ball and what is socket?
Ball = head of femur
Socket = acetabulum
What forms hip joint ligaments?
Thick part of fibrous layer of joint capsule forms ligaments
Hip joint ligaments?
iliofemoral (ileum to femur)
pubofemoral (Pubic bone to femur)
ischiofemoral (Ischium to femur)
Function of hip joint ligaments?
Strengthen joint capsule
Ligament to head of femur from acetabulum?
Ligament surrounds artery and does not support synovial joint
Ligamentum teres
Main blood supply to hip joint in adults?
Medial and lateral circumflex femoral arteries
(Usually from deep femoral artery)
Up to age 4, which artery is important in supplying blood to hip joint area?
Artery to head of fermur


Knee joint?
Hinge joint and synovial joint
Hinge joint part of knee joint?
3 articulations:
- 2x femerotibial
- 1x femeropatellar
Main movement of knee joint?
Flexion- extension
Synovial joint at knee joint?
External fibrous layer (not as strong as hip joint)
Internal membranous layer (extensions as bursae)


Extracapsular knee joint ligaments?
Patellar ligament
Lateral (fibular) cillateral ligament
Medial (tibial) collateral ligament
Intra- articular ligaments of knee joint?
Anterior cruciate (ACL)
Posterior cruciate (PCL)
Menisci of knee joint ligaments?
- fibrocartilage
- medial and lateral
How is knee joint integrity checked?
Anterior/ posterior drawer signs
Is knee joint strong or weak?
Weak
Where is popliteal fossa?
Posterior to knee
Boundaries of popliteal fossa?
- superolaterally – biceps femoris
- superomedially – semimembranosus
- inferiorly – gastrocnemius
- roof – popliteal fascia
Contents of popliteal fossa?
lots of fat
terminal small saphenous vein
popliteal vessels
tibial and common fibular nerves
Calcaneal/ achilles tendon?
Thickest and strongest of body
Tendons of gastocnemius and soleus together
Attaches to calcaneal tuberosity of the calcaneus
‘Ankle jerk reflex’ = normal result is plantarflexion, tests S1, S2 nerve roots


Superficial lymphatics?
follow saphenous veins
drain to superficial inguinal lymph nodes
then external iliac lymph nodes
Deep lymphatics?
Follow deep veins
(Popliteal lymph nodes)
Deep inguinal lymph nodes
External iliac lymph nodes
Lumbar lymphatics?
From external to common iliac