Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

Lesions in the two divisions of parietal cortex, 5/7b/MIP and 7a/LIP, produce dissociable reaching deficits. Monkeys with 5/7b/MIP removals were tested on reaching in the dark under two different conditions. All the reaches made on any day were from the same starting position to the same target position in the control condition. In the "transfer" condition, all the reaches were made to the same target position but consecutive reaches were made from different starting positions. The target could be represented as a constant pattern of joint and muscle positions in the control condition. The transfer condition required a representation of the starting position of the hand and/or a representation of the target in terms of its position in space. Removal of areas 5, 7b and MIP produced only a very mild impairment in the control condition and a severe impairment in the transfer condition. This suggests that 5/7b/MIP does not represent the limb in simple sensory or motor coordinates but in terms of its spatial position.


Journal article


Exp Brain Res

Publication Date





311 - 323


Animals, Arm, Brain Mapping, Conditioning, Operant, Darkness, Light, Macaca fascicularis, Male, Movement, Parietal Lobe, Space Perception