Scientists have characterized five different types of human eye movement, each with a unique function and distinctive properties. These movements are accomplished by three antagonistic pairs of muscles that move the eye around a horizontal, a vertical, and a torsional axis.  The muscles are innervated by motorneurons that carry both phasic and tonic signals.  The phasic signals, which control the velocity of eye movement, are propagated directly from brain formations to the motorneurons.  The tonic signals, which control the position of the eye, reach the motorneurons indirectly because the signals go through a neural integrator which transforms the eye velocity signals into eye position signals.

In this experiment, the subject will perform tasks that will generate four of the five different types of eye movement.  Students will record the electrical activity of the oculomotor muscles while these movements are performed.  The record of the electrical activity in the oculomotor muscles is known as an electroculogram or EOG.

Each channel in LabScribe V1.6 or V1.8 has its own digital filter that can be used on- or off-line to isolate a specific range of frequencies from all the ones recorded. 

In addition to content and background for each exercise, each LabsOnCD module provides an experimental data player that allows the student to actually record real experimental data much as they would do in a physical or “wet” lab setting.  LabsOnCD modules contain detailed setup information about the labs that the student is expected to perform. Setup information includes animations, diagrams, video clips of dissections and photos of actual equipment set-ups. Each module has step-by-step instructions for the student, just as a lab manual would. The student is expected to make measurements from the recorded data and produce a lab report.

See more information and view an online demonstration.