lumbosacral plexus Flashcards
which roots does the iliohypogastric nerve consist of?
(T12), L1
which nerve roots does the ilioinguinal nerve consist of?
L1
which muscles are innervated by the iliohypogastric and the ilioinguinal nerve?
internal oblique
transversus abdominis
which nerve roots does the genitofemoral nerve consist of?
L1, L2
which muscles are innervated by the genitofemoral nerve?
cremasteric muscle
which nerve roots does the lateral cutaneous nerve consist of?
L2, L3
what is the sensory innervation of the lateral cutaneous nerve?
anterior and lateral thigh down to the level of the knee
which nerve roots does the obturator nerve consist of?
L2, L3, L4
which muscles does the obturator nerve innervate?
obturator externus
adductor longus, brevis and magnus
gracilis
which nerve roots does the femoral nerve consist of?
L2, L3, L4
which muscles does the femoral nerve innervate?
iliacus
pectineus
sartorius
vastus lateralis, medialis and intermedius
rectus femoris
which nerve roots does the superior gluteal nerve consist of?
L4, L5, S1
which muscles are innervated by the superior gluteal nerve?
gluteus minimus
gluteus medius
TFL
which nerve roots does the inferior gluteal nerve consist of?
L5, S1, S2
which muscles are innervated by the inferior gluteal nerve?
gluteus maximus
which nerve roots does the sciatic nerve consist of?
L4, L5, S1, S2, S3
in which branches does the sciatic nerve devide?
tibial nerve
common peroneal nerve
which muscles does the sciatic nerve innervate?
biceps femoris
semimebranosus
semitendinosus
adductor magnus
which muscles does the tibial nerve innervate?
gastrocnemius
soleus
tibialis posterior
popliteus
plantaris
flexor digitorum longus
flexor hallucis longus
which muscles does the common peroneal nerve innervate?
tibialis anterior
extensor digitorum longus and brevis
peroneus/fibularis longus and brevis
peroneus/fibularis tertius
which nerve roots does the posterior femoral cutaneous nerve consist of?
S1, S2, S3
what sensory innervation does the posterior femoral cutaneous nerve have?
skin of the posterior thigh and leg
skin of the perineum
which nerve roots does the pudendal nerve consist of?
S2, S3, S4
which muscles does the pudendal nerve innervate?
skeletal muscles in the perineum
external and internal urethral spinchter
levator ani
which reflexes and motor tests are performed for L1?
reflex: none
motor: hip flexion
which reflexes and motor tests are performed for L2?
reflex: none
motor: iliopsoas muscle
which reflexes and motor tests are performed for L3?
reflex: femoral nerve (patellar reflex)
motor: hip flexion, knee extension
which reflexes and motor tests are performed for L4?
reflex: femoral nerve (patella reflex)
motor: ankle dorsiflexion (tibialis anterior), quadriceps and hip adductors
which reflexes and motor tests are performed for L5?
reflex: internal hamstring
motor: great toe extension ankle dorsiflexion
which reflexes and motor tests are performed for S1?
reflex: tibial nerve (achilles)
motor: ankle plantar flexion (reach for the sun)
which reflex and motor tests are performed for S2-S5?
reflex: anal ‘wink’
motor: clawing of toes
