Brain

1
Brain

• About 100 billion multipolar neurons
• 3 major portions
• Cerebrum
• Largest part
• Contains nerve centers associated with sensory
  and motor functions
• Provides higher mental functions, including
  memory and reasoning
• Cerebellum - includes centers that coordinate
  voluntary movements
• Brain stem
• Connects parts of the nervous system (???)
• Regulates some visceral (???) activities

2
Hemisphere Dominance

• Right-Left Brain Test
• The dominant hemisphere controls the ability to
  use and understand language.
• Which hemisphere do you think is dominant in most
  of the population?
• Brocas area (???) in the dominant hemisphere
  controls the muscles used in speaking.

3
Hemisphere Functions
Dominant Hemisphere Non-dominant Hemisphere
Language-related activities reading, writing, speaking Nonverbal functions 1. Motor tasks requiring orientation of body in space
Complex intellectual functions requiring verbal, analytical, and computational skills 2. Recognition and understanding of musical patterns 3. Nonverbal visual experiences
4
Corpus Callosum (???) and Hemisphere Dominance

• What is it? Nerve fibers connecting the 2
  cerebral hemispheres
• Functions
• Allows the dominant hemisphere to control the
  motor cortex of the non-dominant hemisphere.
• Transfers info received by the non-dominant
  hemisphere to the dominant hemisphere for use in
  decision-making.