Neurophysiology of Prehension. I. Posterior Parietal Cortex and Object-Oriented Hand Behaviors
نویسندگان
چکیده
منابع مشابه
Neurophysiology of prehension. I. Posterior parietal cortex and object-oriented hand behaviors.
Hand manipulation neurons in areas 5 and 7b/anterior intraparietal area (AIP) of posterior parietal cortex were analyzed in three macaque monkeys during a trained prehension task. Digital video recordings of hand kinematics synchronized to neuronal spike trains were used to correlate firing rates of 128 neurons with hand actions as the animals grasped and lifted rectangular and round objects. W...
متن کاملNeurophysiology of prehension. III. Representation of object features in posterior parietal cortex of the macaque monkey.
Neurons in posterior parietal cortex (PPC) may serve both proprioceptive and exteroceptive functions during prehension, signaling hand actions and object properties. To assess these roles, we used digital video recordings to analyze responses of 83 hand-manipulation neurons in area 5 as monkeys grasped and lifted objects that differed in shape (round and rectangular), size (large and small sphe...
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Studies of hand manipulation neurons in posterior parietal cortex of monkeys suggest that their spike trains represent objects by the hand postures needed for grasping or by the underlying patterns of muscle activation. To analyze the role of hand kinematics and object properties in a trained prehension task, we correlated the firing rates of neurons in anterior area 5 with hand behaviors as mo...
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Prehension movements of the right hand were recorded in a right-handed man (AC), with an injury to the left posterior parietal cortex (PPC) and with a section of the left half of the splenium. The kinematic analysis of AC's grasping movements in direct and perturbed conditions was compared to that of five control subjects. A novel effect in prehension was revealed--a hemispace effect--in health...
متن کاملComparison of direction and object selectivity of local field potentials and single units in macaque posterior parietal cortex during prehension.
Recent studies have shown that the local field potential (LFP) can provide a simple method for obtaining an accurate measure of reaching and saccade behaviors. However, it is not clear whether this signal is equally informative with respect to more complex movements. Here we recorded LFPs and single units (SUs) from different areas in the posterior parietal cortex of macaques during a prehensio...
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ژورنال
عنوان ژورنال: Journal of Neurophysiology
سال: 2007
ISSN: 0022-3077,1522-1598
DOI: 10.1152/jn.00558.2006