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دسته بندی:
شبکه های نورونی - neuron-networks
سال انتشار:
2020
عنوان انگلیسی مقاله:
Origin and dynamics of cortical slow oscillations
ترجمه فارسی عنوان مقاله:
منشا و پویایی نوسانات آهسته قشر مغز
منبع:
Sciencedirect - Elsevier - Current Opinion in Psychology, 15 (2020) 217-223. doi:10.1016/j.cophys.2020.04.005
نویسنده:
Maria V Sanchez-Vives1,2
چکیده انگلیسی:
Slow oscillations are the coordinated activity of large neuronal
populations consisting of alternating active (Up states) and
silent periods (Down states). These oscillations occur in the
corticothalamocortical network during slow-wave sleep and
deep anesthesia. They also spontaneously occur in isolated
cortical slices or in disconnected ‘cortical islands’ in brain
damage. This rhythmic activity emerges in the cortical network
when there are no other driving inputs and is considered its
default activity pattern. During Up states, neocortical neurons
receive barrages of synaptic inputs and fire action potentials.
During Down states, neurons remain silent; rather they are
hyperpolarized, and synaptic activity is almost nonexistent.
From a dynamic perspective, this pattern is often referred to as
a state-dependent bistability. During Up states, the activity
expresses coherent oscillations at high frequencies in the beta
and gamma ranges, sharing properties with wakefulness. The
impact of Up/Down states on synaptic transmission and
plasticity and its relationship with sleep are discussed.
قیمت: رایگان
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