1. No category

Differential saccadic adaptation controlled by target shape and/or color
Laurent Madelain, Jérémie Jozefowiez & Sohir Rahmouni
Laboratoire SCALab, UMR CNRS 9193,Université de Lille
INTRODUCTION
BLOCKING PARADIGM
Procedure: Same as in the shape and color experiment but shape and color are decorrelated.
Visual context cue
Motor context cue
Contextual saccadic adaptation has been found using motor cues but not with visual cues.
Visual Hemifield
Alahyane & Pelisson, 2004
Orbital eccentricity or vergence
Chaturvedi & Van Gisbergen, 1997
Head position(tilt +/- 45°;
supine/upright)
Shelhamer & al, 2002
Gravity (parabolic flight)
Shelhamer & al, 2003
Target +
distractor (1)
Circle goes UP
Triangle goes
DOWN
Target +
distractor (2)
Single subject - target and distractor
Target motion (speed or
direction)
Azadi & Harwood, 2014
Target shape
Bahcall & Kowler, 2000
Target color
Deubel, 1995
Target color & shape
Azadi & Harwood, 2014
Circle goes DOWN
Triangle goes UP
Single subject - target only
Contextual effect is blocked when two possible
contexts are conflicting
Target color and shape can be used as contextual cues
Sorted by color
Sorted by shape
(1)
(2)
Madelain and colleagues (2010) showed that saccadic adaptation is unhampered by target selection. In this
study, we ask whether target selection would facilitate context dependent saccadic adaptation. Adding a
visual distractor could elicit distinct saccade gain states.
P3
METHODS
-20% Y
P1
°
te
+20%
P2
Fi
rs
ts
X
-20%
90
p
+20%
P0
Four amplitudes were
used for the first step:
7.3; 9.5; 11.7 and 13.9
45°
Fixation
850 ms (+/-150)
n=6
Target step
until saccade
(350 ms max)
Trial
duration
1500 ms
Tim
e
All subjects experienced the same trial structure.
Target luminance was fixed for all targets (5cd/m≤).
CONCLUSION
Post saccadic
position Target +
Distractor
500 ms
Shape
Color
Without distractor
With distractor
Target and
distractor
(1)
TRIAL
TYPE A
TRIAL
TYPE B
TRIAL
TYPE A
N= 18
n=18
Shape and color
TRIAL
TYPE A
OR
Target and
distractor
(2)
OR
Target only
(1)
OR
Target only
(2)
OR
Shape and color can be used to evoke differential gain states.
Target selection makes visual context cues relevant.
When two cues are conflicting, contextual effects are blocked.
REFERENCES
Baseline
Adaptation mini-blocks
Random
Recovery
n=18
0
100
200
300
400
500
Trial number
600
700
800
n=14
Alahyane, N., & Pelisson, D. (2004). Eye Position Specificity of Saccadic Adaptation. Investigative Ophthalmology & Visual Science, 45(1), 123130.
Azadi, R., & Harwood, M. R. (2014). Visual cues that are effective for contextual saccade adaptation. Journal of Neurophysiology, 111, 2307-2319.
Bahcall, D.O., & Kowler, E. (2000).The control of saccadic adaptation: implications for the scanning of natural visual scenes. Vision Research, 40: 27792796.
Chaturvedi, V., & Van Gisbergen, J. A. (1997). Specificity of saccadic adaptation in three-dimensional space. Vision Research, 37(10), 13671382.
Deubel, H. (1995). Is saccadic adaptation context-specific? In J. M Findlay, R. Walker, & R. W. Kentridge (Eds.), Eye movement research: Mechanisms, processes and
applications (pp. 177- 187). Amsterdam: Elsevier Science.
Madelain L., Harwood M.R., Herman J.P, Wallman J. (2010). Saccade adaptation isunhampered by distractors. J Vision 10: 29.
Shelhamer, M., & Clendaniel, R. (2002). Sensory, motor, and combined contexts for context-specific adaptation of saccade gain in humans. Neuroscience Letters, 332(3), 200204.
Shelhamer, M., Clendaniel,R.A., Roberts, D.C. (2003). Context-specific adaptation of saccade gain in parabolic flight. J. Vestib. Res., 12, pp. 211–221
PhD grant from local government (Région Nord Pas de calais) and grant ANR-13-APPR-008 (Agence Nationale pour la Recherche)