PSY 164: Sensation and Perception

Class 3

     Neurons and their behavior

  1. What defines a cell?

    1. Basic Structure

    2. The cell membrane

 

  1. The Neuron

    1. Neuron structure tutorial at http://psych.hanover.edu/Krantz/neurotut.html

    2. Basic Structure

  1. Axonal Cytoskeleton  

  1. Types of Neurons

    1. By Number of Processes or Things coming off of the soma

      1. Unipolar

      2. Bipolar

      3. Multipolar

    2. By Function:

      1. Sensory (A)

      2. Motor (B)

      3. Interneuron (C)

  2. Supporting Structures

    1. Glial Cells
      Astrocytes

    2. Myelin Cells

      1. Oligodendrocytes

      2. Schwann Cells

 

V.    The Neural Impulse

A. The Resting Potential

1. -70 mV

2. The Sodium/Potassium Pump

B. The Action Potential

1. The Voltage Cycle

2. Refractory Periods

C. Saltatory Conduction