Table 1.

Description of ALS subjects participating in this study, including their function ratings (ALS-FRS) and current communication methods.

Subject	Description	ALS-FRS	Communication Method
A	Subject in on ventilator with only gaze control.	2	Eye tracker
B	Subject is able to walk and speak with difficulty.	24	Talking
C	Subject is able to speak with difficulty, has control of arms, but cannot walk.	18	Talking
D	Subject is able to walk with walker, can speak, but has trouble supporting head while sitting.	28	Talking
E	Subject is able to speak and move head with minimal difficulty, uses a BiPAP mask, has some control of one hand, but cannot move legs.	11	Talking, head mouse
F	Subject is paralyzed from the neck down and has no ability to speak.	8	Head mounted laser