Table 1 List of all animals, procedures and outcomes

Sex

Male

Male

Male

Male

Male

First surgery performed (headpost, chamber, ref. wire)

Yes

Yes

Yes

Yes

Yes

Body weight at first surgery

385 g

438 g

455 g

530 g

428 g

Second surgery performed (electrodes, viral vector)

Yes

Yes

Yes

No

No

Body weight at second surgery

371 g

460 g

445 g

n.a.

n.a.

Neural recordings in V1

Yes

Yes

Yes

n.a.

n.a.

Neural recordings in V6

Yes

Poor

Yes

n.a.

n.a.

Optogenetic stimulation in V6

Yes

Poor

Yes

n.a.

n.a.

Duration (months) after first surgery*

40

26

26

26

26

Duration (months) after second surgery*

35

19

19

n.a.

n.a.

Data shown in figures

Fig. 1, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8

–

Fig. 3, Fig. 7

–

–