Published online by Cambridge University Press: 23 December 2009
Summary
This chapter offers an overview of the most recent techniques for recording of cortical activity in the awake, behaving monkey. We review the different types of signals that can be extracted from extracellular cortical recordings made with microelectrodes. We also discuss how these signals can be related to dexterous hand movements. This leads us to consider the functional organization of the motor cortex for the control of the distal muscles during grasp.
Introduction
The unique ability of human and non-human primates to interact with their environment is dependent upon the skilled use of the hands for grasping and manipulation of objects. The grasping of objects requires continuous interaction between the sensory processing of the object's physical properties and the motor mechanisms controlling the shape of the hand and the positioning of the hand and digits upon the object. Over the past 30 years, intracortical extracellular recording techniques in the awake monkey have been an essential tool to investigate the organization of the cortical circuits involved in the control of grasp. It has been shown that multiple areas in the parietal and frontal lobes contribute to the transformation from sensory inputs to motor outputs for efficient grasp. This cortical network influences the spinal circuitry that controls the distal hand and digit muscles. Part of this corticospinal control is mediated by direct cortico-motoneuronal (CM) projections from the primary motor cortex (M1) onto motoneurons innervating hand muscles.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.