Distinct Cortical Circuit Mechanisms for Complex Forelimb Movement and Motor Map Topography
نویسندگان
چکیده
منابع مشابه
Distinct Cortical Circuit Mechanisms for Complex Forelimb Movement and Motor Map Topography
Cortical motor maps are the basis of voluntary movement, but they have proven difficult to understand in the context of their underlying neuronal circuits. We applied light-based motor mapping of Channelrhodopsin-2 mice to reveal a functional subdivision of the forelimb motor cortex based on the direction of movement evoked by brief (10 ms) pulses. Prolonged trains of electrical or optogenetic ...
متن کاملComplex movement topography and extrinsic space representation in the rat forelimb motor cortex as defined by long-duration intracortical microstimulation.
Electrical stimulation of the motor cortex in the rat can evoke complex forelimb multi-joint movements, including movement of limb and paw. In this study, these movements have been quantified in terms of 3D displacement and kinematic variables of two markers positioned on the wrist and middle digits (limb and paw movement, respectively). Electrical microstimulation was applied to the motor cort...
متن کاملStriatal dopamine depletion induces forelimb motor impairments and disrupts forelimb movement representations within the motor cortex.
While limb motor deficits of Parkinson's disease are well characterized, the effects of striatal dopamine depletion on the motor cortex is poorly understood. We therefore aimed to 1) examine the effects of striatal dopamine depletion on forelimb function and cortical motor map topography and 2) explore potential relationships between forelimb function and cortical movement representations in an...
متن کاملSynthesizing complex movement fragment representations from motor cortical ensembles.
We have previously shown that the responses of primary motor cortical neurons are more accurately predicted if one assumes that individual neurons encode temporally-extensive movement fragments or preferred trajectories instead of static movement parameters (Hatsopoulos et al., 2007). Building on these findings, we examine here how these preferred trajectories can be combined to generate a rich...
متن کاملA circuit for motor cortical modulation of auditory cortical activity.
Normal hearing depends on the ability to distinguish self-generated sounds from other sounds, and this ability is thought to involve neural circuits that convey copies of motor command signals to various levels of the auditory system. Although such interactions at the cortical level are believed to facilitate auditory comprehension during movements and drive auditory hallucinations in pathologi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Neuron
سال: 2012
ISSN: 0896-6273
DOI: 10.1016/j.neuron.2012.02.028