The spinal cord connects your lower back to your brain. It is a long tube-like band of tissue extending from your brain. It carries nerve signals from your brain to your body and vice versa. These nerves helped you feel sensations and can move your body as a response to such stimulus.
Cerebrum is the largest part of your brain. It instructs and is responsible for movements and body temperature. Other parts of your cerebrum are for, speech, thinking, judgement, and reasoning, problem-solving, learning and emotions. Other functions are associated with your vision, hearing, touch, smells and other senses.
https://my.clevelandclinic.org/health/body/21946-spinal-cord#:~:text=The%20spinal%20cord%20is%20a,sensations%20and%20move%20your%20body.
https://www.hopkinsmedicine.org/health/conditions-and-diseases/anatomy-of-the-brain
https://www.med.uio.no/klinmed/english/research/news-and-events/news/2015/nerve-fibres-secrets-revealed.html#:~:text=Nerve%20fibres%20enable%20neurons%20to,how%20these%20nerve%20fibres%20form.