Eye hand coordination in time and space [Elektronische Ressource] / vorgelegt von Uta Sailer

Uta Sailer

Informations

• Publié par: ludwig-maximilians-universitat_munchen
• Publié le: 01 janvier 2003
• Nombre de lectures: 23
• Langue: Deutsch
• Poids de l'ouvrage: 1 Mo

Extrait

Eye-Hand Coordination in
Time and Space






















Uta Sailer
Aus der Neurologischen Klinik und Poliklinik der Ludwig-Maximilians-Universität München
Vorstand: Prof. Dr. med. Dr. h. c. Thomas Brandt FRCP









Thema der Dissertation:


Eye-Hand Coordination in Time and Space





Dissertation
zum Erwerb des Doktorgrades der Humanbiologie
an der Medizinischen Fakultät der
Ludwig-Maximilians-Universität zu München




vorgelegt von
Uta Sailer

aus
München

Jahr
2003
Mit Genehmigung der Medizinischen Fakultät
der Universität München













1. Berichterstatter: Prof. Dr. A. Straube
2. Berichterstatter Prof. Dr. F.P. Kolb
Mitberichterstatter: Prof. Dr. R. Breul
Prof. Dr. I. Rentschler
Mitbetreuung durch den Dr.-Ing. Thomas Eggert
promovierten Mitarbeiter:
Dekan: Prof. Dr. med. Dr. h. c. K. Peter
Tag der mündlichen Prüfung: 08.04.2003
Contents
1 General Introduction____________________________________________________ 1
1.1 Temporal coupling______________________________________________1
1.2 Spatial coupling_________________________________________________4
1.3 Brain areas involved in eye-hand coordination_________________________ 9
1.4 Short outline of chapters 2 to 6 ____________________________________ 10
1.5 References 13
2 Spatial and temporal aspects of eye-hand coordination across different tasks _____ 19
2.1 Abstract______________________________________________________19
2.2 Introduction___________________________________________________19
2.3 Method22
2.4 Results_______________________________________________________28
2.5 Discussion____________________________________________________37
2.6 Appendix_____________________________________________________42
2.7 Acknowledgements_____________________________________________44
2.8 References 45
3 Global effect of a nearby distracter on targeting eye and hand movements________ 48
3.1 Abstract______________________________________________________48
3.2 Introduction___________________________________________________48
3.3 Experiment 1__________________________________________________52
3.4 Ex261
3.5 Experiment 365
3.6 Ex470
3.7 General discussion______________________________________________78
3.8 Conclusion____________________________________________________82
3.9 Acknowledgements_____________________________________________83
3.10 References 84
4 Static hand position affects the landing position of eye movements ______________ 88
4.1 Abstract______________________________________________________88
4.2 Introduction___________________________________________________88
4.3 Method90
4.4 Results_______________________________________________________93
4.5 Discussion____________________________________________________96 Contents
4.6 References ____________________________________________________ 97
5 Predictive pointing movements and saccades towards a moving target ___________ 98
5.1 Abstract______________________________________________________98
5.2 Introduction___________________________________________________98
5.3 Method_____________________________________________________101
5.4 Results106
5.5 Discussion112
5.6 Acknowledgements____________________________________________116
5.7 References ___________________________________________________ 117
6 Haptic target texture influences the kinematics of pointing movements, but not
of eye movements 119
6.1 Abstract119
6.2 Introduction__________________________________________________
6.3 Method_____________________________________________________120
6.4 Results______________________________________________________123
6.5 Discussion___________________________________________________125
6.6 References 128
7 Summary and conclusions _____________________________________________ 129
7.1 Chapter 2: Spatial and temporal aspects of eye-hand coordination across
different tasks ________________________________________________ 130
7.2 Chapter 3: Global effect of a nearby distracter on targeting eye and hand
movements __________________________________________________ 132
7.3 Chapter 4: Static hand position affects the landing position of eye
movements 134
7.4 Chapter 5: Predictive pointing movements and saccades towards a moving
target _______________________________________________________ 135
7.5 Chapter 6: Haptic target texture influences the kinematics of pointing
movements, but not of eye movements_____________________________ 136
7.6 General conclusion____________________________________________137
7.7 References ___________________________________________________ 143
8 Acknowledgements 144
9 Appendix A: Deutsche Zusammenfassung ________________________________ 145
9.1 Kapitel 2: Räumliche und zeitliche Kopplung von Hand und Auge in
verschiedenen Aufgaben ________________________________________ 146 Contents
9.2 Kapitel 3: Wirkung eines zielnahen Ablenkers auf Hand- und Augen-
bewegungen__________________________________________________ 148
9.3 Kapitel 4: Einfluß statischer Handposition auf die Landeposition von
Augenbewegungen ____________________________________________ 151
9.4 Kapitel 5: Prädiktion eines bewegten Ziels__________________________ 152
9.5 Kapitel 6: Differentielle Effekte der Oberflächenbeschaffenheit des Ziels
auf die Kinematik von Augen- und Handbewegungen _________________ 154
9.6 Fazit________________________________________________________155
10 Appendix B: Lebenslauf _______________________________________________ 161
1 General Introduction
Every day of our lives starts with a succession of actions that require eye-hand coordination.
From the time we try to turn off the alarm clock and get dressed, to putting toothpaste on the
brush and preparing coffee: all these goal-directed hand movements need to be coordinated
with information from the eye.
When performing such simultaneous goal-directed eye and hand movements, both the
time and location at which eye and hand land on the object need to be harmonised. For better
localising the alarm clock, we need to see it before we hit it. In order to use this visual
information for an accurate hand movement, we need the eye to land at the same position, i.e.
eye and hand both need to be on the alarm clock instead the water glass beside. These two
aspects, temporal and spatial coordination, have encouraged a great deal of research. On the
following pages, first a number of existent findings will be summarised on how this
coordination could be achieved. Then the experiments performed within this thesis to extend
the results in the literature will be described.
1.1 Temporal coupling
The term “temporal coupling” of eye and hand encompasses two aspects: one is the temporal
organisation of eye and hand, i.e. the order in which eye and hand are executed or the point in
time at which eye and hand movements are initiated relatively to each other. The second
aspect of temporal coupling is the question whether there is one common start signal to
initiate the movements, or two separate ones.
1.1.1 Order of movement execution
Historically, studies on eye-hand coordination first dealt with its temporal aspect. Typically,
the eye is on target before the hand (e.g. Abrams et al. 1990, Carnahan & Marteniuk 1991).
Foveating a target before manipulating an object has several advantages: information with
higher resolution provided by the fovea may help in the initial phases of the hand movement,
for example in preshaping the hand. Moreover, foveation of the target provides more detailed
information to compare the target with the moving hand (e.g. about distance, grasp size). This
information can be used to correct the ongoing hand movement’s grasp component and 2 Chapter 1
trajectory. More specifically, it was shown that the primary saccade is completed around the
time the hand achieves peak velocity (e.g. Helsen et al. 2000). In this way, important visual
information for movement correction can be picked up and used for an online adjustment of
hand movements. Indeed, it has repeatedly been shown that hand movement accuracy drops
when foveation of the target is prevented (e.g., Abrams et al. 1990, Vercher et al. 1994).
Other results indicate that this temporal yoking of hand to eye is not a one-way street.
Neggers and Bekkering (2000) found that saccade onset to a second target was delayed until
an arm movement to the first target was completed. This finding shows that not only the hand
is dependent on the eye, but also the eye is coupled to the hand.
Recently, the investigation of the temporal organisation of eye and hand has been
extended to real-life situations. The behaviour induced by a restricted laboratory context may