membranous labyrinth: the sensory structures of the inner ear including the labyrinthine receptors and the cochlea; contained within the bony labyrinth
structure: a particular complex anatomical part of a living thing
babinski: extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons