Nerves and meridians Flashcards
What is the dermatome function of the Median nerve?
Innervates forearm flexors and thenar muscles; sensory function includes lateral palm and fingers.
What is the meridian relation function of the Tibial nerve?
Innervates posterior leg muscles; provides sensation to the sole of the foot.
What is the motor function of the Femoral nerve?
Controls knee extension via quadriceps; provides sensation to anterior thigh and medial leg.
What is the myotome function of the Fibular nerve?
Superficial branch controls foot eversion; deep branch controls dorsiflexion and toe extension.
What is the dermatome function of the Ulnar nerve?
Controls hand movements, including finger abduction and adduction; provides sensation to the medial hand.
What muscles does the radial nerve innervate?
Triceps brachii, anconeus, brachioradialis, and extensor muscles of the forearm.
What is the sensory function of the Fibular nerve?
Superficial branch controls foot eversion; deep branch controls dorsiflexion and toe extension.
What is the sensory distribution of the ulnar nerve?
Medial one and a half fingers (pinky and half of the ring finger), both on the palmar and dorsal sides.
What is the meridian relation function of the Sciatic nerve?
Innervates posterior thigh muscles and splits into tibial and fibular nerves; sensory to posterior leg and foot.
What is the motor function of the Radial nerve?
Supplies extensor muscles of the arm and forearm; sensory to the posterior arm, forearm, and hand.
What is the motor function of the Median nerve?
Innervates forearm flexors and thenar muscles; sensory function includes lateral palm and fingers.
What is the sensory role of the common fibular nerve?
Provides sensation to the lateral leg and dorsum of the foot.
What is the function of the plantar nerves?
Medial plantar nerve supplies the medial sole and first 3.5 toes; lateral plantar nerve supplies the lateral sole and last 1.5 toes.
What is the myotome function of the Radial nerve?
Supplies extensor muscles of the arm and forearm; sensory to the posterior arm, forearm, and hand.
What is the motor function of the Plantar nerve?
Medial branch controls medial foot muscles; lateral branch controls small foot muscles and lateral sole sensation.
What does the tibial nerve supply in the foot?
Intrinsic foot muscles via its branches, the medial and lateral plantar nerves.
Which nerve runs along the medial epicondyle of the humerus?
Ulnar nerve, making it vulnerable to injury at the ‘funny bone’.
What is the dermatome function of the Tibial nerve?
Innervates posterior leg muscles; provides sensation to the sole of the foot.
What is the dermatome function of the Radial nerve?
Supplies extensor muscles of the arm and forearm; sensory to the posterior arm, forearm, and hand.
What is the dermatome function of the Fibular nerve?
Superficial branch controls foot eversion; deep branch controls dorsiflexion and toe extension.
What is the motor function of the Tibial nerve?
Innervates posterior leg muscles; provides sensation to the sole of the foot.
What movement is affected by deep fibular nerve damage?
Dorsiflexion (lifting the foot) and toe extension, leading to foot drop.
Which myotomes are associated with wrist flexion?
C6, C7, primarily through the median nerve supplying the flexor carpi radialis.
What is the sensory function of the Musculocutaneous nerve?
Innervates anterior arm muscles (biceps, brachialis); provides lateral forearm sensation.
