cranial nerves. human brain on dark background

abducens accessory anatomical anatomy auditory background biology brain brainstem central cerebellum cerebral cortex cranial cross dark diagram disease eye facial ganglion glossopharyngeal head health human hypoglossal illustration infographic medical medicine muscle nerve nerves nervous neurology oculomotor olfactory optic optical organ poster psychology realistic science section sense sensory smell spinal system trigeminal trochlear vagus vector vestibulocochlear vision