Reference frames for planning reach movement in the parietal and premotor cortices

by Bahareh Taghizadeh
Doctoral thesis
Date of Examination:2015-02-17
Date of issue:2016-02-16
Advisor:Prof. Dr. Alexander Gail
Referee:Prof. Hansjörg Scherberger
Referee:Prof. Dr. Florentin Wörgötter
Referee:Prof. Dr. Stefan Treue
Persistent Address: http://dx.doi.org/10.53846/goediss-5518

 

 

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Abstract

English

Human and nonhuman primates are able to plan and execute goal-directed behavior and flexibly respond to their surrounding stimuli. Their ability to adapt to changes in their environment is a crucial factor for their survival. Primates use their hands to reach to objects, grasp and manipulate them. Planning a goal-directed hand reaching movement towards an object is a distributed task that engages many cortical and subcortical areas in primate's brain, prior and during the reaching movement. This work addresses planning goal-directed reach movements in human and nonhuman primates. More specifically, the present thesis investigates different representations of spatial parameters, namely egocentric and allocentric, which are required for planning a reach movement towards an object.
Keywords: goal-directed reach movement; parietal cortex; premotor cortex; extracellular recordings; sensorimotor transformation; reference frame; egocentric; allocentric; size encoding; spatial encoding; dynamic spatial selectivity; flexible encoding; electrophysiology
 
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