Laboratory Suggestions
Demonstration.—Sensory motor reactions.
Demonstration.—Nervous system. Models and frog dissections.
Demonstration.—Neurones under compound microscope (optional).
Demonstration.—Reflex acts are unconscious acts: show how conscious acts may become habitual.
Home exercise in habit forming.
The senses.—Home exercises.—(1) To determine areas most sensitive to touch. (2) To determine or map out hot and cold spots on an area on the wrist. (3) To determine functions of different areas on tongue.
Demonstration.—Show how eye defects are tested.
Laboratory summary.—The effects of alcohol on the nervous system.
The Body a Self-directed Machine.—Throughout the preceding chapters the body has been likened to an engine, which, while burning its fuel, food, has done work. If we were to carry our comparison further, however, the simile ceases. For the engineer runs the engine, while the bodily machine is self-directive.