Table of Contents for Section 2: Follow the footsteps: turning, walking, and balancing

Chapters		Web-pages
		Table of Content for all available sections
Chapter 1		All the world's a stage: geometry of the environment for human action
		1. The stage: the main setting for our investigation
		2. The actor's location relative to the stage: the geometry of standing
Chapter 2		Follow the footsteps: a simple action of turning left on the stage
		1. The mechanics of turning: rotating the foot relative to the hip
		2. The mechanics of turning: applying muscle power to rotate the foot relative to the hip
		3. The informatics of turning: neurons signalling the muscle to contract (or relax) in order to to rotate the foot relative to the hip
		4. The geometry of turning: locomotion relative to the stage
Chapter 3		Walking in a straight line
		1. The mechanics of walking: the hip-joint, the knee, and the ankle
		2. The geometry of walking: travelling forward on one leg
		3. The geometry of walking: bringing the other leg forward to the front
		4. The timing of walking: coordinating the movements of the two legs
		5. The mechanics of walking: applying muscle power to walk
		6. The mechanics of walking: hip movements during the walk
Chapter 4		Balancing while standing, turning, and walking
		1. Perception required for balancing: proprioception
		2. The mechanics of balancing: counteracting gravity and momentum
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		8. Locomotion as a sequence of geometric figures parallel to the plane representing the floor of the stage
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