Anatomy Flashcards
Difficulty standing from sitting position, which nerve might be affected
Inferior gluteal nerve
Major hip flexor?
Illiopsoas muscle
Major hip extensor?
Gluteus maximus
Muscles of the anterior compartment of the thigh
Sartorius and quads
Muscles of the medial compartment of the thigh
Pectineus, Gracilis, Adductors
What nerve innervates the gracilis
Obturator nerve
Obturator nerve and sciatic nerve supply what muscle
Adductor Magnus
Superior gluteal nerve supplies what muscles?
Injury presents how?
Gluteus minimus and medius, tensor fascia latae and piriformis
Trendelenburg sign. Pelvis tilts with walking because weight bearing leg cannot maintain balance.
Lumbar plexus
network of nerves T12 to L4
Supplies skin and muscles of lower limb
Sacral Plexus
L4 to S4
Skin and muscles of pelvis and lower limb
What nerve derives from T12 to L1 level
Iliohypogastric nerve
What nerve is motor to internal oblique and transverse abdominis
Iliohypogastric
Innervates the cremasteric muscle?
Genital branch of genitofemoral nerve
Motor function of the lateral cutaneous nerve of the thigh
None
Sensory: Innervates anterior and lateral thigh down to the level of the knee
What nerve is sensory to the suprapubic region
Iliohypogastric
Common source of injury to iliohypogastric nerve
Abdominal or pelvic surgery
Post transverse incisions, sutures may trap nerves
Nerve from L1 to L2?
genitofemoral nerve
Cremasteric reflex? what is it? How can it be lost?
Stroke inner thigh, scrotum rises on ipsilateral side
Injury to genitofemoral nerve
Lateral femoral cutaneous nerve can be compressed how?
Tight clothing, obesity, pregnancy
Meralgia paresthetica - other thigh nerve syndrome, burning pain, paresthesia (numbness/tingling), hypesthesia (diminished sensation)
Obturator nerve
Motor to thigh adductors
Adductor longs, brevis, Magnus, Obturator externus, gracilis
Sensory to small part of medial thigh
Can be injured during pelvic surgery.
Weak adduction
Who innervates anterior thigh muscles, hip flexors, knee extensors
Femoral nerve
Hip flexors?
The primary hip flexors are the pectineus, iliacus, and sartorius muscles
Knee extensors
Quads (vastus intermedialis is deep to rectus femoris)
Saphenous nerve?
Femoral nerve gives off saphenous nerve
Innervates skin on medial leg and foot
Saphenous vein stripping for CABG may damage saphenous nerve, causing numbness in lower leg
Injury to femoral nerve?
Weak thigh flexion and knee extension,
absent patellar reflex
Sciatic nerve
L4 to L3
Largest nerve in body
Branches: common peroneal and tibial
Common peroneal?
Branch: Superficial fibula - evert the foot
Branch: deep fibula - dorsiflexion of foot, extension of toes
Symptoms, common peroneal nerve injury
Foot drop (weak dorsiflexion ) Foot feels limp Sensory loss, dorm of foot, lateral shin
Tibial nerve
Motor to posterior leg muscles
Sensory to heel/toe
Plantar flexion, toe flexion, inversion
Pudendal nerve
s2-s4
Nerve supply to genital area
SEnsory: penis, clitoris, skin of perineum
Pudendal nerve block has been replaced by
Epidural
Hip abductors?
Hip abduction is performed by the gluteus medius, minimus, piriformis and tensor fascia latae
