Brain Notes

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Brain Notes
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Tools for Viewing Brain Structure and Activity

• EEG
• Electroencephalogram
• measures electrical currents across the brain
• Measure brain activity

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Infant scientist Noah, age 9 mo.
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Tools for Viewing Brain Structure and Activity

• CT scan
• Also called a CAT scan
• Computerized axial tomography
• X-ray of brain tissue
• Shows brain structure

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Tools for Viewing Brain Structure and Activity

• PET scan
• Positron Emissions Tomography
• Patients drinks radioactive glucose and image
  shows areas of brain activity.

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Tools for Viewing Brain Structure and Activity

• MRI
• Magnetic Resonance Imaging
• Exposes brain to magnetic field
• Shows brain structure

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Tools for Viewing Brain Structure and Activity

• fMRI
• functional MRI
• Uses magnetic field
• Not harmful
• Shows brain structure and activity

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Organization of the Nervous System
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Autonomic Nervous System
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Autonomic Nervous System

• Sympathetic Nervous System speeds up the body.
• Parasympathetic Nervous System slows the body.

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Types of Neurons

• Sensory Neurons
• Carry the message from the sense organs to the
  CNS
• Motor Neurons
• Carry the message from the CNS to the muscles or
  glands

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Cerebellum

• Controls balance and coordination
• In the rear of the head, behind the brainstem

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Cerebral Cortex

• Controls information processing wrinkled to
  increase surface area

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Frontal Lobes

• Located in the forehead region
• Includes the motor cortex (part of brain that
  controls voluntary movement)
• judgment, planning, processing new memories

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Parietal Lobes

• Located on the top and rear of head
• Contains the sensory cortex (part of brain that
  registers and processes senses)

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Occipital Lobes

• Located in the back of the head
• Contains the visual cortex

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Temporal Lobes

• Located on the sides of head, above ears
• Receives and processes auditory information

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Corpus Callosum

• bundle of nerves connecting the left and right
  hemispheres