NR 341 NERVOUS SYSTEM NOTES. Nervous System Brain and spinal cord for central nervous system. Physiology of the brain: • Our brains need constant flow of blood to supply it with glucose and oxygen. Brains get about 15% of the cardiac output. At the most, brains can withstand up to 6 minutes without oxygen before irreversible damage takes place, but this varies from person to person. • Autoregulation-Automatic adjustment of the cerebral blood vessels to maintain a constant supply of bloo...

NR 341 NERVOUS SYSTEM NOTES.

NR 341 NERVOUS SYSTEM NOTES. NR 341 NERVOUS SYSTEM NOTES. Nervous System Brain and spinal cord for central nervous system. Physiology of the brain: • Our brains need constant flow of blood to supply it with glucose and oxygen. Brains get about 15% of the cardiac output. At the most, brains can withstand up to 6 minutes without oxygen before irreversible damage takes place, but this varies from person to person. • Autoregulation-Automatic adjustment of the cerebral blood vessels ...