Signal-independent noise in intracortical brain-computer interfaces causes movement time properties inconsistent with Fitts' law.

ABSTRACT:

Objective

Do movements made with an intracortical BCI (iBCI) have the same movement time properties as able-bodied movements? Able-bodied movement times typically obey Fitts' law: [Formula: see text] (where MT is movement time, D is target distance, R is target radius, and [Formula: see text] are parameters). Fitts' law expresses two properties of natural movement that would be ideal for iBCIs to restore: (1) that movement times are insensitive to the absolute scale of the task (since movement time depends only on the ratio [Formula: see text]) and (2) that movements have a large dynamic range of accuracy (since movement time is logarithmically proportional to [Formula: see text]).

Approach

Two participants in the BrainGate2 pilot clinical trial made cortically controlled cu

SUBMITTER: Willett FR 

PROVIDER: S-EPMC5371026 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature