Impulse Processing page 383

The way impulses are processed reflects the organization of neurons in the brain and spinal cord.

1. Neuronal pools a. Neurons are organized into pools within the central nervous system.

b. Each pool receives, processes, and conducts away impulses.

c. Each neuron in a pool may receive excitatory and inhibitory stimuli.

d. A neuron is facilitated when it receives subthreshold stimuli and becomes more excitable.

2. Convergence a. Impulses from two or more incoming axons may converge on a single neuron.

b. Convergence enables a neuron to sum impulses from different sources.

3. Divergence a. Impulses leaving a pool may diverge by passing onto several output axons.

b. Divergence amplifies impulses.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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