Marina has inflammation of the membranes in her brain and spinal column, pains in her limbs, and a stiff neck. she has: cerebrospinal meningitis botulism scarlet fever typhoid fever

It is possible that she has a cerebrospinal meningitis.

Cerebrospinal meningitis affects the brain, spinal cord and the other peripheral parts of the nervous system. 
Also the sensory neurons may arise in some deficiency. Sensory neurons are the neurons responsible for receiving the information from the environment or the stimuli. This sensory neurons pass the message thru interneurons and then to Central Nervous System (brain and spinal cord) which then sends the signal to the motor neuron. 

True, using a pedometer can promote a physically active lifestyle.