Lower Extremity Flashcards
Strongest muscle of the thigh/action
Iliopsoas (iliacus and major psoas)/powerful flexor of the thigh at hip joint
Compartments of the thigh
Anterior, medial, lateral
Quadriceps femoris
Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius
Component of quadriceps femoris that both flexes the thigh at hip joint and extends the knee at knee joint
Rectus femoris
Originates from the ASIS
Sartorius and tensor fascia lata
Originates from AIIS
Rectus femoris
Inserts to the lesser trochanter of femur
Iliacus and psoas
Common insertion of quadriceps femoris
Patellar tendon
Innervation of anterior compartment of the thigh
Femoral n.
Innervation of medial compartment of medial thigh
Obturator n.
Medial muscles of the thigh
Adductor longus
Adductor brevis
Adductor Magnus
Gracilis
Adductor muscles of the thigh commonly inserts at______
Linea aspera of femur
Insertion of the hamstring part of adductor magnus
Adductor tubercle of femur
Innervation of the posterior thigh muscles
Sciatic
Extensors at hip joint
Flexors at knee joint
Posterior thigh muscles
Semitendinusos
Semimembranosus
Biceps femoris (long head-tibia, short head-common peroneal)
Origin of hamstrings
Ischial tuberosity
Contents of femoral triangle
lateral to medial
Nerve, femoral sheath, artery, vein
Contents of femoral sheath
NAVEL Nerve Artery Vein Empty space Lymphatics
Location of hernial sac
Below and lateral to pubic tubercle
Adductor canal or Hunter’s canal
Anterior: sartorius
Lateral: Vastus medialis
Posterior and medial: adductor longus/magnus
Contents of hunter’s canal
Femoral artery/vein
Saphenous nerve
Nerve to Vastus medialis
Common origin of gluteal muscles
Outer surface of ilium
All gluteal muscles inserts at greater trochanter of femur except ____
Gluteus Maximus- gluteal tuberosity, iliotibial tract
Quadratus femoris - quadrate tubercle
Abduction of the thigh
Gluteus minimums and medius
Lateral rotation of the thigh
Piriformis
Waddling gait
Weakness of gluteus minimus and medius
Superior gluteal nerve
Roots of femoral and obturator nerve
L2, L3, L4
Lumbar plexus
L1-L4
Sacral plexus
L4 and L5, S1-S4
Roots of sciatic nerve
L4, L5, S1, S2, S3
Supplies gluteus minimus and medius
Superior gluteal (L4, L5, S1)
Innervates gluteus Maximus
Inferior gluteal n. (L5, S1, S2)
Pudendal nerve supplies ___
Perineum
S2, S3, S4
Difficulty in “climbing the stairs”
Inferior gluteal n.
Weakness in the ability to flex the thigh and hip
Femoral nerve lesion
Saphenous nerve lesion
Pain and paraesthesia in the skin and medial aspect of leg and foot
No motor loss
Inability to adduct the thigh at the hip joint
Obturator nerve lesion
Femoral fx: young/direct trauma
Trochanteric fracture
Major blood supply of femur
Medial femoral circumflex
Coxa vara vs. Coxa valga
Coxa vara: neck shaft angle decreased, limited abduction, fracture
Coxa valga: neck shaft angle increased, limited adduction, congenital disorder
Dislocation of head of femur
Medially rotated
Sciatic nerve compression
Innervation/action: anterior leg muscle
Deep peroneal n/ dorsiflexion and extension
Innervation/action: lateral leg muscle
Superficial peroneal n/plantar flexion and eversion
Innervation/action: posterior leg muscle
Tibial n./plantar flexion and flexion
____only posterior leg muscle that cannot plantar flex
Popliteus
Triceps surae
Gastrocnemius+Soleus
Borders of the popliteal fossa
Superolateral: biceps femoris
Superomedial: semitendinosus, semimembranosus
Inferomedial: medial head of gastrocnemius
Inferolateral: lateral head of gastrocnemius, plantaris
Contents of popliteal fossa
Medial to lateral: Popliteal a. Popliteal v. Sciatic --> common peroneal Posterior cutaneous nerve
Achilles tendon supplied by
S1
Blood flow from common iliac
Internal iliac
External iliac–>femoral–>popliteal–>ant/post tibial–>plantar arch
Biceps brachii
C5
Brachioradialis
C6
Triceps brachii
C7
Patella
L4
Drainage of great Saphenous
Femoral v
Drainage of small Saphenous
Popliteal v
Innervation of the dorsal surface of the foot
Deep peroneal, superficial peroneal
Dorsiflexion (nerve)
Deep peroneal
Plantar flexion (nerve)
Posterior- tibial n.
Peroneus vs tibialis
Evert, plantarflex vs. invert, plantarflex
Foot drop
Lesion: common peroneal esp deep peroneal
Can’t stand on tip toes
Tibial nerve lesion
Weakness on eversion, paraesthesia on dorsal aspect of foot
Superficial peroneal
Hamstring muscles
Semitendinosus
Semimembranosus
Biceps femoris
Adductor Magnus
Ligaments of knee joint
ACL, PCL, LCL, MCL
Unhappy triad of O’Donoghue
ACL, MCL, Medial meniscus
Genu valgum vs. genu varum
Tibia twisted laterally vs. tibia twisted medially
Tarsal bones
14
Lymphatic drainage
Deep inguinal group
Most powerful flexor muscle of the thigh
Iliopsoas
Lymph drainage of the UE
Lateral Axillary
Compression applied to lateral head and neck of the fibula
Common peroneal
Flexes and medially rotates the thigh
Tensor fascia lata
Achilles tendon
Dense regular connective tissue
Talipes calcaneovalgus vs. talipes equinovarus
Dorsiflexedand everted vs. plantarflexed inverted