. Author manuscript; available in PMC: 2017 May 28.

Published in final edited form as: IEEE Trans Biomed Eng. 2009 Jan;56(1):172–178. doi: 10.1109/TBME.2008.2005973

TABLE I.

LGN Electrode Tip Count for 3d Isotropic Placement Matrix

Monkey^†					Human^‡
λ (μm)	Total Points	Magno	Parvo	Within 10°	Within 10°

1000	59± 7	12± 3	46± 6	25± 5	193± 42
800	112± 9	24± 5	88± 9	48± 7	378± 82
600	260±13	55± 7	205±12	112± 9	895± 194
400	880±27	185±13	695±25	376±17	3,020± 654
200	6,965±77	1,461 ±38	5,504±64	2,974±44	24,161±5232

^†

The mean and standard deviations of the numbers of electrode tips landing in LGN were counted for varying average densities based on Cartesian electrode tip spacing (λ). The total count of electrode tips falling in one hemisphere’s LGN is given, along with the breakdown for those in magnocellular and parvocellular layers, and the total number that fell within the portion of LGN representing the central 10 degrees of visual space.

^‡

For human data, the mean and standard deviation of LGN volume representing the inner 10 degrees of visual space have been normalized by λ³ using volumetric data from 14 LGNs (volumes of 138, 139, 153, 162, 170, 177, 182, 200, 200, 208, 209, 241, 247, 280 mm³ for the central 10 degrees, data extracted from Schneider, et al., 2004 [19], bottom right panel of Fig. 5; compare with 25 mm³ for monkey, see main text).