title: Effects of lesions to area V6A in monkeys.
abstract: In order to assess the role played by area V6A in visuomotor control, two adult green monkeys ( Cercopithecus aethiops) were subjected to small, bilateral lesions in the anterior bank of the parieto-occipital sulcus. Before and after the lesions, monkeys were tested for naturally designed reaching, grasping and picking-up pieces of food from various positions on a plate and from a differently oriented narrow slit. All movements were recorded with closed circuit TV and analysed offline on a single-photogram basis for defective reaching and wrist orientation. V6A lesions provoked parietal weakness, reluctance to move, and specific deficits in reaching, wrist orientation and grasping. Recovery from the observed deficits was rapid, even after a second, contralateral lesion was given, creating a bilateral lesion. Thus, together with previous anatomical and electrophysiological data, these results directly support the hypothesis that area V6A is part of the network involved in the control of reaching movements and wrist orientation.
authors.affiliation: Center for Neuroscience, University of Trieste, Italy. battagli@units.it
authors.forename: Piero Paolo
authors.initials: PP
authors.lastname: Battaglini
authors.forename: Amir
authors.initials: A
authors.lastname: Muzur
authors.forename: Claudio
authors.initials: C
authors.lastname: Galletti
authors.forename: Miran
authors.initials: M
authors.lastname: Skrap
authors.forename: Andrea
authors.initials: A
authors.lastname: Brovelli
authors.forename: Patrizia
authors.initials: P
authors.lastname: Fattori
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D001930:Brain Injuries / Q000503:physiopathology; D002522:Chlorocebus aethiops / Q000033:anatomy & histology / Q000502:physiology*; D005260:Female; D005385:Fingers / Q000294:innervation / Q000502:physiology; D018737:Hand Strength / Q000502:physiology; D008297:Male; D019957:Motor Skills Disorders / Q000209:etiology / Q000473:pathology / Q000503:physiopathology*; D009068:Movement / Q000502:physiology*; D009949:Orientation / Q000502:physiology; D010296:Parietal Lobe / Q000293:injuries / Q000473:pathology / Q000503:physiopathology*; D011187:Posture / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D014793:Visual Cortex / Q000293:injuries / Q000473:pathology / Q000503:physiopathology*