Table 3:

Clinical condition: dementia and movement disorders (degenerative diseases of the motor system)

	MRI, Brain		MRI, Spine		CT, Head		PET, Brain	SPECT, Brain
	Without Contrast	Without and With Contrast	Without Contrast	Without and With Contrast	Without Contrast	Without and With Contrast
Motor neuron diseasea	8	7	8b	7b	5	4	3c	3c

Note:—MRI indicates MR imaging. Appropriateness criteria scale from 1 to 9; 1, least appropriate; 9, most appropriate.

^aMR spectroscopy, head = rating of 3; functional MRI, head = rating of 2.

^bMay need multilevel imaging.

^cFor problem solving.