www.psychology.unn.ac.uk

Myelin Sheath

•White lipid-rich substance

•Myelin electrically insulates nerve fibre and increase the speed of nerve impulses

•Gaps in the myelin sheath are called nodes of Ranvier

Central Nervous System

• Consists of the Brain and Spinal Cord

www.smc.edu

The Brain

Cerebral cortex: cognition, senses, movement Cerebellum: coordination of muscle contraction Thalamus: relay center

Hypothalamus: homeostasis Limbic System: instincts, emotions

Brain Stem: medulla controls breathing, blood pressure, heart rate

Parts of the Brain

•Cerebrum

•Thalamus

•Hypothalamus

•Cerebellum

•Midbrain

•Pons

•Medulla Oblongata

www.smc.edu