Tomás Hromádka , Anthony M . Zador and
نویسندگان
چکیده
منابع مشابه
Toward the mechanisms of auditory attention.
Since the earliest studies of auditory cortex, it has been clear that an animal's behavioral or attentional state can play a crucial role in shaping the response characteristics of single neurons. Much of what has been learned about attention has been made using human and animal models, but little is known about the cellular and synaptic mechanisms by which attentional modulation of neuronal re...
متن کاملCorrelated connectivity and the distribution of firing rates in the neocortex.
Two recent experimental observations pose a challenge to many cortical models. First, the activity in the auditory cortex is sparse, and firing rates can be described by a lognormal distribution. Second, the distribution of nonzero synaptic strengths between nearby cortical neurons can also be described by a lognormal distribution. Here we use a simple model of cortical activity to reconcile th...
متن کامل1 Up - states are Rare in Awake Auditory 1 Cortex
18 The dynamics of subthreshold membrane potential provide insight into the 19 organization of activity in neural circuits. In many brain areas membrane potential is 20 bistable, transiting between a relatively hyperpolarized down-state and a depolarized 21 up-state. These up and down-states, which have been proposed to play a number of 22 computational roles, have mainly been studied in anesth...
متن کاملReliability and Representational Bandwidth in the Auditory Cortex
It is unclear why there are so many more neurons in sensory cortex than in the sensory periphery. One possibility is that these "extra" neurons are used to overcome cortical noise and faithfully represent the acoustic stimulus. Another possibility is that even after overcoming cortical noise, there is "excess representational bandwidth" available and that this bandwidth is used to represent con...
متن کاملUp states are rare in awake auditory cortex.
The dynamics of subthreshold membrane potential provide insight into the organization of activity in neural circuits. In many brain areas, membrane potential is bistable, transiting between a relatively hyperpolarized down state and a depolarized up state. These up and down states, which have been proposed to play a number of computational roles, have mainly been studied in anesthetized and in ...
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