Neural Coding for Effective Rehabilitation

Table 1

Comparison of functional brain imaging methods.

	Temporal resolution	Spatial resolution	Advantage	Limitation
fMRI [144]	0.5 s	1 mm	Noninvasive whole brain imaging	Indirect measurement
Optical microscopy [23]	~0.2 s	~0.2 m	Single cell resolution	Unsuitable for human subject
Scalp EEG [145]	~1 ms	2 cm (128 channels)	Noninvasive whole brain recording	Low spatial resolution; signals are easily contaminated by noises (e.g., EMG, motion artifacts, etc.)
ECoG [95–99, 146]	~5 ms	~10 mm	Long-term and continuous recording	Invasive recording by attaching the electrode array on the surface of the brain