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Table of Contents

  • Parts of the Brain
    • Neurons
      • Soma
      • Axons
        • Myelin Sheath
      • Dendrites
  • Sensory Perception
    • Vision
Complete neuron cell diagram.

Parts of the Brain


Neurons transmit nerve impulses in the brain. A human brain is made up of an estimated 15 - 33 billion of these nerve cells. Each neuron is connected by synapses to several thousand other neurons.

A neuron is comprised of three parts:

  1. The soma (The cell body).
  2. The axon, which carries signals from the soma to the presynaptic ending.
  3. The dendrites, which carry signals from the postsynaptic ending to the soma.

Sensory Perception


Optic Array: the pattern of light reaching the eye (Eysenck & Keane, 2010)