Dermatomes and Myotomes of the lower limb Flashcards
inquinal ligament
l1
lateral side of thigh
l2
lower medial side of thigh
l3
medial side of great toe
l4
medial side of digit II
l5
little toe
s1
back of thigh
s2
skin over the gluteal fold
s3
flextion of the hip
l1 and l2
extension of the knee
l3 and l4
knee flextion
l5 and s2
plantarflexion of foot
s1 and s2
adduction of digits
s2 and s3
tap on patellar ligament
l3 and l4
tendon tap on calcaneal tendon posterior to ankle
s1 and s2
femoral nerve innervates skin on the
anterior thigh medial side of leg and medial side of ankle
obturator nerve innervates skin on the
lateral side of the ankle and foot
common fibular nerve innervates
lateral side of leg and the dorsum of the foot
where is the femoral nerve located
anterior compartment of thigh
where is the superior and inferior gluteal nerves locaked
posterior pelvis region
where is the obturator nerve found
medial compartment of thigh
where is the sciatic nerve found
posterior compartment of thigh, leg, and sole of foot
superficial branch of fibular nerve found
lateral compartment of leg
deep branch of fibular nerve found
anterior compartment of leg
what region of the skin does the femoral nerve innervate
anterior thigh, medial side of leg and medial side of ankle
obturator nerve innervates what part of the skin
medial side of thigh
tibial part of sciatic nerve innervates what part of the skin
lateral side of ankle and foot
common fibular nerve innervates what part of the skin
lateral side of leg and dorsum of foot
what forms the margins of the greater sciatic foramen
greater sciatic notch
upper border of the sacrospinous and sacrotuberous ligaments
lateral border of sacrum
What goes through the obturator canal
obturator nerve, artery and vein
what goes through the greater sciatic foramen above the piriformis
superior gluteal NAV
what goes through the greater sciatic foramen below the piriformis
sciatic nerve
inferior gluteal NAV
pudendal artery
internal pudendal artery and vein
posterior femoral cutaneous nerve
nerve to obturator internus and gemllus superior muscles
nerve to quadratus femoris and gemllus inferior muscles
what goes through the gap between the inguinal ligament and the pelvic bone
psoas major, illiacus, pectineus femoral AVN lymphatics genitofemoral nerve femoral branch lateral cutaneous nerve of thigh
illioinguinal nerve spinal segment
l1
illioinguinal motor and sensory function
motor-innervates abdominal wall
sensory- anteromedial part of upper thigh and adajcent skin of perineum
genitofemoral spinal segment
l1 and l2
genitofemoral motor and sensory function
no motor function
femoral-innervates skin on anterior central part of upper thigh and genital branch innervates anterior perineum
femoral spinal segment
l2 to l4
femoral motor and sensory function
all muscles in anterior compartment of thigh and abdomen
sensory-skin over anteiror thigh, anteromedial knee and medial side of leg and foot
obturator spinal segment
l4-s3
obturator motor and sensory function
all muscles in the medial compartment of the thigh and obturator externus
sensory- skin over upper medial aspect of thigh
sciatic nerve spinal segment
l4-s3
sciatic nerve motor and sensory function
motor-all muscles posterior compartment of thigh and adductor magnus and all muscles in leg and foot
sensory- skin over lateral side of leg and foot and over the sole and dorsal surface of foot
superior gluteal spina segment
l4 to s1
superior gluteal motor function
muscles of gluteal region
inferior gluteal spinal segment
l5-s2
inferior gluteal motor function
muscles of gluteal region
lateral cutaneous nerve of thigh spinal segment and sensory function
l2, l3 and parietal peritoneum in illiac fosa, skin over anterolateral thigh
posterior cutaneous nerve of thigh spinal segment and sensory function
skin over gluteal fold and upper medial aspect of thigh and adjacent perineum, posterior aspect of thigh and upper posterior leg
nerve to quadratus femoris spinal segment
l4-s1
nerve to obturator internus spinal segment
l5-s1
perforating cutaneous nere spinal segment and sensory function
skin over medial aspect of gluteal fold
S2 and S3
femoral triangle
base of triangle is inquinal ligament
medial border- medial margin of adductor longus
lateral margin-medial margin of the sartorius
floor- pectineus and adductor longus
appex- continuous with adductor canal
structures in the femoral triangle
femoral VAN and lymphatic vessels
popliteal fossa
semitindinosus and semimembranosus and divided by biceps femoris
gastrocnemius
floor-capsule fo knee and popliteus muscle
roof-deep fascia
Contents of popliteal fossa
popliteal artery, vein, tibial and common fibular nerves
superior gluteal nerve
l4-s1
inferior gluteal and nerve to piriformis
l5-s2
obturator internus and quadratus femoris
l5-s1
femoral nerve
l2-l4
l1-l4 anterior rami nnervates
psoas and iliacus
obturator nerve
l2-l4
sciatic
l5-s2
deep fibular
l4-s1
superficial fibular
l5-s1
tibial
s1-s2
coxa vara
decreased angle between femoral shaft and neck
genu varum
bow leg
coxa valga
increased angle between femoral shaft and neck
genu valgum
knock knee
trendelenberg sign
weakness in gluteus medius and minimus demonstrated by inability to maintain a level pelvis when standing on one foot
inferior gluteal
usually weakness in exension of thigh, difficulty walking up stairs
piriformis syndrome
parlysis of hamstring muscles and all muscles below knee
foot drop
achilles calcaneal reflex is decreased and loss of sensation along lateral and posterior leg and entire foot injry in popiteal fossa would spar hamstrings (sciatic nerve injury)
tibial injury in popliteal fossa
all muscles posterior leg and all muscles in sole of foot and loss of sensation along sole of foot
tibial injury in tarsal tunnel
entrapment between medial malleolus and calcaneus characterized by pain, tingling, numbness along plantar aspect of foot
median plantar nerve entrapemnt
paresthesia on medial plantar aspect of foot
bumper fracture
fracture of fibular neck; paralysis of all muscles in anterior and lateral compartment of leg and sensory loss along anterior aspect of the leg and dorsum of the foot excluding tips
superficial fibulra
parlysis of muslces in lateral compartment of leg and sensory loss on the dorsum of the foot
femoral nerve injury
parlysis of muscles in the anterior compartment of the leg; decreased patellar reflex; sensory loss along anterior thigh and medial leg
lateral femoral cutaneous injury
sensory loss along the thigh called meralgia paresthetica
obturator nerve injury
paralysis of muscles in medial compartment of thigh and sensory loss in small patch along medial thigh just above the knee
patellar reflex
l2–l4 femoral nerve
achilles reflex
calcaneal; s1-s2 tibial nerve
anterior draw test
tibial movement anteriorly-positive to ACL injury
posterior draw test
displace tibia posterioly-positive with injuryt to PCL
inversion injuries to ankle affect
anterior talofibular and calcaneofibular ligaments
pott fracture
forceful eversion pulls deltoid ligament talus slips and fractures lateral malleolus and tears posterior tibofibular ligament
cotton fracture
fractures involving medial malleolus, fibula and posterior lip of the inferior articular surface of tibia
halluz valgus
lateral deviation of great toe