Table 1.
Comparing discharge of SC neurons before and after backward adaptation
| Cell ID | Adaptation gain | Preadaptation movements to T1 |
Postadaptation movements to T1 |
Preadaptation movements matched to postadaptation amplitude and direction |
||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Spikes/s |
No. of spikes |
Duration |
n | Spikes/s |
No. of spikes |
Duration |
n | Spikes/s |
No. of spikes |
Duration |
n | |||||||||||
| Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | |||||
| Q1 | 0.66 | 86.0 | (19.6) | 8.8 | (2) | 42.4 | (2.3) | 15 | 85.7* | (22.2) | 8.6* | (2.2) | 40.9 | (4.5) | 80 | 260.6 | (38.2) | 24.3 | (3.4) | 33.2 | (1.7) | 19 |
| Q2 | 0.68 | 53.2 | (37.4) | 6.0 | (4.2) | 52.5 | (0.7) | 2 | 69.8* | (28.6) | 7.6* | (3.2) | 49.1 | (4.1) | 25 | 142.1 | (13.3) | 14.0 | (1.4) | 38.5 | (0.7) | 2 |
| Q3 | 0.77 | 130.3 | (20.4) | 16.3 | (2.4) | 65.4 | (4.6) | 39 | 118.7* | (18.7) | 14.6* | (2.3) | 62.9 | (3.6) | 40 | 172.9 | (18.9) | 20.0 | (2) | 55.8 | (3.9) | 6 |
| Q4 | 0.72 | 115.3 | (50.9) | 13.3 | (5.9) | 55.2 | (2.2) | 9 | 104.2* | (59.1) | 11.3* | (6.3) | 48.7 | (4) | 72 | 225.2 | (40.1) | 23.0 | (6.7) | 42.0 | (2.4) | 22 |
| Q5 | 0.78 | 154.1 | (23.1) | 17.0 | (2.4) | 50.4 | (1.4) | 7 | 137.6* | (22) | 15.1* | (2.3) | 49.5 | (3.3) | 37 | 192.7 | (28.9) | 19.7 | (3) | 42.1 | (2.3) | 22 |
| Q6 | 0.69 | 42.4 | (14.5) | 4.6 | (1.6) | 48.1 | (4.1) | 10 | 57.9* | (27.4) | 6.1* | (2.8) | 45.2 | (4.3) | 51 | 243.6 | (35.8) | 23.5 | (3) | 36.8 | (3.6) | 16 |
| Q7 | 0.82 | 201.5 | (31.3) | 20.7 | (3.1) | 42.7 | (2) | 24 | 183.7* | (25.4) | 18.9* | (2.5) | 42.8 | (2.9) | 30 | 294.4 | (32.6) | 28.5 | (2.6) | 37.0 | (2.8) | 6 |
| Q8 | 0.70 | 133.5 | (27.6) | 13.1 | (2.6) | 38.4 | (2.6) | 27 | 90* | (25.6) | 9.1* | (2.5) | 40.8 | (4.1) | 74 | 222.3 | (29.8) | 20.8 | (2.6) | 33.7 | (2.4) | 20 |
| Q9 | 0.73 | 165.2 | (49.5) | 16.4 | (4.7) | 39.8 | (2.2) | 24 | 133.2* | (44.6) | 13.5* | (4.3) | 42.2 | (4.6) | 36 | 320.5 | (60.2) | 29.4 | (5.3) | 32.0 | (1.7) | 9 |
| Q10 | 0.63 | 95.3 | (21.1) | 9.9 | (2) | 43.8 | (2.8) | 20 | 67.8* | (20.3) | 7* | (2.1) | 43.6 | (5.3) | 79 | 219.1 | (30.9) | 20.3 | (2.9) | 32.6 | (1.1) | 24 |
| Q11 | 0.76 | 74.8 | (39.8) | 8.5 | (4.5) | 53.4 | (2.7) | 32 | 50.7* | (35.9) | 5.6* | (3.9) | 51.0 | (3.4) | 50 | 153.8 | (62.8) | 15.5 | (6.2) | 41.2 | (2.9) | 19 |
| Q12 | 0.70 | 247.4 | (31) | 24.5 | (8.6) | 48.9 | (4.6) | 10 | 229.1* | (29.7) | 25* | (3.5) | 49.2 | (4.9) | 30 | 133.7 | (24.8) | 13.1 | (2.3) | 38.2 | (2) | 9 |
| Q13 | 0.63 | 249.6 | (20.1) | 29.4 | (2.2) | 57.7 | (3.4) | 11 | 265.6* | (21.1) | 30* | (2.3) | 53.4 | (7.8) | 45 | 157.6 | (45.4) | 15.4 | (4.5) | 37.6 | (0.9) | 5 |
| Q14 | 0.72 | 309.7 | (41.6) | 33.9 | (4.3) | 49.6 | (2.3) | 19 | 277.9* | (38.6) | 30.5* | (4.1) | 49.8 | (4.5) | 58 | 192.8 | (18) | 19.3 | (2) | 39.8 | (1.7) | 8 |
| Q15 | 0.70 | 225.1 | (12.4) | 27.7 | (2.1) | 62.9 | (4.8) | 16 | 272.6* | (21.2) | 31.5* | (2.6) | 55.5 | (6) | 39 | 185.0 | (20.9) | 19.8 | (2.5) | 46.9 | (3.8) | 20 |
| Q16 | 0.75 | 142.2 | (20.1) | 17.3 | (2.7) | 61.9 | (5.3) | 32 | 141.2* | (25) | 16.4* | (3) | 56.2 | (4.1) | 36 | 97.4 | (15.6) | 10.5 | (1.9) | 47.3 | (4.2) | 29 |
| Q17 | 0.71 | 137.9 | (28.1) | 16.4 | (3.3) | 59.3 | (3.3) | 19 | 149.9* | (21.7) | 16.8* | (2.4) | 52.2 | (4.6) | 76 | 42.7 | (14.7) | 4.3 | (1.5) | 41.6 | (4) | 26 |
| Q18 | 0.76 | 128.5 | (20.4) | 14.7 | (2.6) | 53.9 | (4) | 34 | 150.4* | (25.6) | 16.5* | (2.8) | 49.8 | (4.1) | 152 | 27.1 | (17.3) | 2.7 | (1.8) | 39.9 | (2.5) | 49 |
| Q19 | 0.69 | 256.6 | (29.3) | 25.5 | (2.9) | 39.4 | (2.6) | 16 | 270.5* | (30.7) | 27.5* | (3.2) | 41.8 | (4.7) | 25 | 141.9 | (29.1) | 13.4 | (2.8) | 34.1 | (2.5) | 22 |
| Q20 | 0.64 | 175.7 | (14.3) | 21.0 | (1.8) | 59.5 | (1.8) | 8 | 160.6* | (20.1) | 18* | (2.2) | 52.2 | (3.2) | 36 | 48.6 | (8.4) | 5.0 | (0.8) | 43.0 | (4.8) | 4 |
| Q21 | 0.81 | 225.3 | (26.6) | 25.4 | (3) | 52.7 | (2.7) | 36 | 222.3* | (23.2) | 24.7* | (2.3) | 51.4 | (4.5) | 18 | 94.8 | (37.7) | 9.6 | (4) | 40.2 | (2.9) | 24 |
| U1 | 0.63 | 56.1 | (44.2) | 6.0 | (4.7) | 47.5 | (1.7) | 4 | 78.9* | (32.3) | 8.1* | (3.3) | 43.5 | (3.4) | 107 | 216.4 | (38.2) | 21.2 | (3.6) | 38.3 | (2.4) | 54 |
| U2 | 0.68 | 123.9 | (11.2) | 14.7 | (1.4) | 58.3 | (1.6) | 6 | 126.6* | (26.9) | 14.2* | (2.9) | 52.3 | (5.4) | 70 | 351.6 | (29.5) | 37.8 | (3.1) | 47.7 | (1.5) | 13 |
| U3 | 0.53 | 130.2 | (64.5) | 13.7 | (6.3) | 46.6 | (4.3) | 16 | 159.1* | (34.2) | 16* | (3.4) | 41.3 | (8.7) | 23 | 296.7 | (50.7) | 27.4 | (5) | 32.2 | (2.9) | 5 |
| U4 | 0.72 | 115.4 | (48.6) | 13.3 | (5.3) | 56.2 | (5.5) | 20 | 124.1* | (22.1) | 14.2* | (2.4) | 54.4 | (4.6) | 29 | 298.7 | (23.7) | 29.0 | (2.2) | 37.2 | (5.6) | 5 |
| U5 | 0.57 | 5.1 | (7.2) | 0.5 | (0.7) | 39.5 | (2.1) | 2 | 7.9* | (15.1) | 0.7* | (1.4) | 35.8 | (3.1) | 46 | 308.8 | (41.1) | 27.8 | (3.3) | 30.0 | (1.4) | 4 |
| U6 | 0.63 | 177.7 | (54.4) | 19.5 | (6) | 49.8 | (0.5) | 4 | 126.3* | (24.3) | 13.4* | (2.6) | 46.2 | (2.6) | 69 | 294.6 | (23.1) | 29.1 | (2.5) | 38.9 | (3.4) | 8 |
| U7 | 0.64 | 108.9 | (28.8) | 11.8 | (2.8) | 48.5 | (3.7) | 4 | 137.5* | (29.9) | 14.7* | (3.1) | 47.3 | (2.7) | 77 | 280.2 | (32.2) | 28.0 | (2.8) | 40.0 | (1.4) | 2 |
| U8 | 0.82 | 197.1 | (17.4) | 24.9 | (2.1) | 66.2 | (2.2) | 21 | 151.2* | (39.7) | 18.7* | (4.9) | 63.7 | (2) | 29 | 210.3 | (27.3) | 25.2 | (3.3) | 59.8 | (2.2) | 25 |
| U9 | 0.70 | 22.6 | (8.1) | 2.6 | (0.9) | 57.2 | (1.7) | 11 | 47.7* | (21.9) | 5.3* | (2.4) | 50.6 | (1.9) | 98 | 125.7 | (49) | 13.1 | (4.8) | 45.1 | (6.1) | 13 |
| U10 | 0.75 | 15.2 | (15.4) | 1.8 | (1.8) | 59.2 | (2.1) | 10 | 58.4* | (28.6) | 6.7* | (3.3) | 55.0 | (3.4) | 52 | 193.2 | (45.7) | 21.8 | (4.1) | 53.8 | (8.3) | 4 |
| U11 | 0.74 | 344.3 | (47.5) | 39.1 | (5.8) | 53.8 | (8.3) | 17 | 372.9* | (37.9) | 42.1* | (4.4) | 53.0 | (5.2) | 64 | 261.8 | (60.9) | 25.5 | (6.1) | 37.1 | (2.1) | 13 |
| U12 | 0.53 | 503.1 | (32.2) | 60.3 | (4.3) | 59.9 | (3.4) | 12 | 459.6* | (56.3) | 51.8* | (6.7) | 52.6 | (6.9) | 71 | 216.9 | (96.6) | 22.5 | (10.7) | 42.4 | (5.6) | 27 |
| U13 | 0.54 | 405.3 | (44.3) | 47.5 | (5.1) | 57.3 | (2.8) | 15 | 392.1* | (84.7) | 43.6* | (9.4) | 50.6 | (5.9) | 47 | 180.2 | (73.6) | 18.5 | (7.9) | 41.8 | (3.1) | 37 |
| U14 | 0.63 | 280.9 | (34.2) | 38.1 | (4.9) | 75.5 | (2.2) | 12 | 275.1* | (29.4) | 36.5* | (3.6) | 73.0 | (7.3) | 65 | 122.8 | (51.3) | 15.1 | (6.6) | 62.4 | (2.4) | 8 |
| U15 | 0.82 | 343.3 | (29.5) | 41.6 | (4.2) | 61.1 | (2) | 8 | 377.4* | (37.6) | 44.6* | (4.5) | 58.2 | (1.9) | 31 | 297.3 | (48.5) | 33.6 | (4.6) | 53.6 | (5.9) | 8 |
| U16 | 0.72 | 163.2 | (25.6) | 21.5 | (3.3) | 71.8 | (1.3) | 4 | 172.2* | (28.5) | 21.3* | (3.4) | 64.0 | (2.1) | 77 | 88.6 | (26.6) | 9.2 | (2.6) | 44.5 | (9.7) | 11 |
Beginning from the left, the table presents the cell identification number, and the gain of the backward adaptation (postadaptation amplitude/preadaptation amplitude). For preadaptation movements to the T1 location, postadaptation movements when T1 was illuminated, and preadaptation movements that were matched for amplitude and direction with the postadaptation movement vectors, mean discharge rates (and standard deviation), mean number of spikes (SD) in measurement window (60 ms before saccade onset to saccade end), mean duration of saccades (SD), and number of trials contributing to the means are shown. Discharge rates during postadaptation were compared to matched vector preadaptation movements (Student's t test). Number of spikes in the burst during postadaptation saccades was compared with matched vector preadaptation movements (Student's t test). Asterisks indicate that in every case discharge rates and number of spikes were statistically significantly different (p < 0.05). Italicized entries indicate electrode position e1 from Fig. 3; standard typeface indicates electrode position e2.