Nervous System - Get to know our nervous system a bit closer, how does it works? | Neurology

Summary

Key Points

• The brain, protected by the skull, is the central organ that controls all bodily functions, from physical activity to emotions and creativity. 0:15
• It is divided into three main parts: the cerebrum, cerebellum, and brain stem. 0:29
• The cerebrum, the largest part, consists of left and right hemispheres, each containing frontal, parietal, occipital, and temporal lobes with distinct functions. 0:42
• The cerebellum manages movement, coordination, and balance, preventing falls. 0:55
• The brain stem (midbrain, pons, medulla oblongata) regulates involuntary actions such as breathing, heart rate, and blood pressure. 1:10
• The nervous system is split into the central nervous system (brain and spinal cord) and the peripheral nervous system (network of nerves throughout the body). 1:25
• The spinal cord connects the brain to the peripheral nervous system and runs from the medulla oblongata to the lumbar region. 1:37
• Sensory neurons detect stimuli (e.g., a hot cup) and send information to the brain, which then sends motor commands via efferent neurons to produce a response. 2:10
• The peripheral nervous system includes 43 pairs of nerves—12 cranial nerves from the brain and 31 spinal nerves from the spinal cord—and functions like a two‑way highway transmitting sensory (afferent) and motor (efferent) signals. 2:17
• Neurons are the basic units of the nervous system, composed of dendrites (input), a soma with nucleus, and an axon (output) that carry electrical signals. 2:53