How the Brain Works The Facts Visually Explained by DK (z-lib.org)

20 21 THE PHYSICAL BRAIN Brain Cells Glia The nervous system relies on a team of helper cells called glia. Astrocytes control wh ...

THE PHYSICAL BRAIN Nerve Signals FLUID INSIDE AXON Direction of nerve impulse Nerve Signals The brain and nervous system work by ...

22 THE PHYSICAL BRAIN Nerve Signals 23 Synapses Some neurons do not share a physical connection. Instead they meet at a cellular ...

THE PHYSICAL BRAIN Brain Chemicals Brain Chemicals While communication in the brain relies on electric pulses flashing along wir ...

24 THE PHYSICAL BRAIN Brain Chemicals 25 Normal dopamine levels Dopamine is a neurotransmitter associated with feeling pleasure. ...

THE PHYSICAL BRAIN Networks in the Brain Networks in the Brain The patterns of nerve-cell connections in the human brain are bel ...

26 THE PHYSICAL BRAIN Networks in the Brain 27 Small-world networks Brain cells are not connected in a regular pattern, nor are ...

Brain Anatomy The brain is a complex mass of soft tissue composed almost entirely of neurons, glial cells (see p.21), and blood ...

28 29 Hemispheres The cerebrum forms in two halves, or hemispheres, which are divided laterally by a gap called the longitudinal ...

THE PHYSICAL BRAIN The Cortex A functional map The cortex is a multilayered coating of neurons, with their cell bodies at the to ...

30 THE PHYSICAL BRAIN The Cortex 31 Parietal cortex combines information from senses to orientate body Somatosensory cortex proc ...

THE PHYSICAL BRAIN Nuclei of the Brain Nuclei of the Brain In brain anatomy, a nucleus is a cluster of nerve cells that have a d ...

32 THE PHYSICAL BRAIN Nuclei of the Brain 33 Action selection The basal ganglia have an important role in filtering out the nois ...

The hypothalamus This small region under the forward region of the thalamus is the main interface between the brain and the horm ...

34 35 The thalamus The word “thalamus” is derived from the Greek word for “inner chamber,” and this thumb-sized mass of gray mat ...

THE PHYSICAL BRAIN The Limbic System and Cerebellum The Brain Stem and Cerebellum The lower regions of the brain are the brain s ...

36 THE PHYSICAL BRAIN The Brain Stem and Cerebellum 37 The cerebellum Although the cerebellum appears to play a part in maintain ...

THE PHYSICAL BRAIN The Limbic System The Limbic System Sitting below the cortex and above the brain stem, the limbic system is a ...

38 THE PHYSICAL BRAIN The Limbic System 39 Klüver-Bucy syndrome This condition is caused by damage to the limbic system and resu ...

THE PHYSICAL BRAIN Imaging the Brain Imaging the Brain Modern medicine and neuroscience can see through the skull to observe str ...