The Lumina LP-400 is a reliable patient response system designed specifically for use in an fMRI. Lumina was developed to satisfy the requirements of both the clinical and research fields. The system consists of the following main components:

- A controller (shown on the right) provides TTL and serial port output that is compatible with E-Prime, Presentation, SuperLab, Cambridge Research Systems, and other packages. The controller provides a scanner trigger input as well.

- One of the response pads, or button response unit (BRU) pictured below. All models are built from 100% fiber optics and plastic, and come with 16 feet of fiber optic cables.

- Two 65 foot shielded cables

The most frequently asked question is how a Lumina system is installed. The following diagram gives an overview:

A Response Pads: These are built of 100% plastic and fiber optics. They are totally inert and safe.

B OTEC Unit: Converts electricity to light and is connected to the pads via protected fiber optic cables.

C Shielded Cable: Connects the OTEC unit to the penetration panel. Uses wires and connectors of the highest quality.

D RF Filter: Optionally installed if the penetration panel does not have a built-in filter.

E Shielded Cable: Connects the penetration panel to the controller.

F Controller: Detects key presses, times them, performs TTL I/O, and connects to the host computer. See Controller Features for all the features built into this versatile device.

G Serial Cable: Connects the controller to the host computer.

There are two other optional connections not shown on the diagram:

• Scanner Trigger Input: The Lumina controller can detect the scanner triggers and pass them through to the serial port.

• Accessory Connector: Provides a highly configurable TTL input/output link.

Please have a look at the website of Cedrus for all available models