Lecture 5.1 - (S) Defining Spatial Locations

This module we turn to how spatial locations are defined, and discuss the concept of a reference frame. Initially, reference frames are quite different for visual, auditory, and somatosensory information. Visual location is defined with respect to the eyes, whereas sound locations are detected with respect to the head and ears, and tactile locations are detected based on body surface position. As you'll see, the brain transforms these signals into new reference frames to facilitate interactions between these sensory systems. We then consider space on a larger scale, and ask how we know where we are and how we navigate from one place to another. Knowledge of self-motion relies in part on the vestibular system, our sense of balance. The vestibular system works in concert with vision and motor systems to update our sense of position and keep us from getting lost. This module's material is covered in chapters 7, "Your Sunglasses Are in the Milky Way", and 8, "Going Places" of Making Space.

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