Table 2.

Incidence of the different neuronal types in AES as a function of postnatal age

Age (weeks postnatal)	Unresp	Som	Aud	Vis	AS	VS	VA	VAS	Total
4	0.53 (37)	0.30 (21)							0.83 (58)
8	0.31 (24)	0.47 (36)	0.16 (12)		0.04 (3)				0.98 (75)
12	0.16 (14)	0.27 (24)	0.31 (28)	0.18 (16)	0.02 (2)	0.10 (9)	0.07 (6)	0.02 (2)	1.14 (101)
16	0.18 (12)	0.26 (17)	0.31 (20)	0.21 (13)		0.12 (7)	0.17 (11)	0.04 (3)	1.29 (83)
20	0.13 (6)	0.26 (12)	0.32 (15)	0.31 (14)		0.22 (10)	0.12 (6)	0.09 (4)	1.47 (67)
Adult	0.07 (12)	0.33 (57)	0.32 (55)	0.25 (43)	0.03 (5)	0.16 (29)	0.16 (28)	0.05 (10)	1.37 (239)

Numbers show the incidence of neurons per millimeter of electrode traverse. Numbers in parentheses show the n for each category. Unresp, Sensory unresponsive; Som, Somatosensory; Aud, auditory; Vis, visual; AS, auditory–somatosensory; VS, visual–somatosensory; VA, visual–auditory; VAS, visual–auditory–somatosensory.