Unleash Your Inner Genius: 2026 Neuroscience Challenge on Brain, Neurons, and Nervous System Fun!

The outer layer of the cerebrum is called the cerebral cortex. It’s a sheet of gray matter that covers the brain’s surface and houses the neuronal cell bodies involved in processing sensory information, directing motor planning, and supporting higher cognitive functions like thinking and language. The cortex is folded into gyri and sulci to create more surface area for these complex tasks. Beneath it lies white matter, which connects cortical areas, while deeper gray structures—such as the basal ganglia, thalamus, and hypothalamus—are located further inside and serve different roles: the basal ganglia help regulate movement, the thalamus relays sensory information, and the hypothalamus controls autonomic and endocrine functions. Since the question asks for the outer layer, the cerebral cortex is the best answer.