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Organization of the Brain01:30

Organization of the Brain

The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
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Cerebrum: Anatomical Overview I01:26

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The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...
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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen. The...

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Microdissection of Mouse Brain into Functionally and Anatomically Different Regions
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Published on: February 15, 2021

Un modelo a gran escala del funcionamiento del cerebro.

Chris Eliasmith1, Terrence C Stewart, Xuan Choo

  • 1Centre for Theoretical Neuroscience, University of Waterloo, Waterloo, ON N2J 3G1, Canada. celiasmith@uwaterloo.ca

Science (New York, N.Y.)
|December 1, 2012
PubMed
Resumen
Este resumen es generado por máquina.

Desarrollamos Spaun, un modelo cerebral de 2,5 millones de neuronas, para vincular la actividad cerebral compleja con diversos comportamientos animales. Este modelo cierra con éxito la brecha entre los procesos neuronales y las acciones observables en varias tareas.

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Área de la Ciencia:

  • Neurociencia cognitiva y neurociencia cognitiva.
  • La neurociencia de sistemas es la neurociencia de sistemas.
  • La neurociencia computacional es una neurociencia computacional.

Sus antecedentes:

  • Relacionar la actividad cerebral compleja con el comportamiento animal sigue siendo un desafío central en la neurociencia.
  • Los modelos neuronales existentes a gran escala no han cerrado completamente la brecha entre la actividad neuronal y la función biológica.

Objetivo del estudio:

  • Para presentar un modelo neural novedoso y a gran escala (Spaun) capaz de cerrar la brecha entre la actividad cerebral y el comportamiento.
  • Para demostrar la capacidad del modelo para exhibir diversos comportamientos en respuesta a estímulos visuales.

Principales métodos:

  • Desarrollo de un modelo computacional de 2,5 millones de neuronas llamado "Spaun".
  • El modelo procesa secuencias de imágenes visuales como entrada.
  • Se utiliza un brazo modelado físicamente para generar todas las respuestas del modelo, simulando la salida del motor.

Principales resultados:

  • El modelo de Spaun cierra con éxito la brecha entre la actividad neuronal y la función biológica.
  • El modelo exhibe una amplia gama de comportamientos en ocho tareas diversas.
  • Spaun captura aspectos clave de la neuroanatomía, la neurofisiología y el comportamiento psicológico.

Conclusiones:

  • El modelo de Spaun representa un avance significativo en la vinculación de la complejidad neuronal con el comportamiento.
  • Este modelo proporciona un marco para comprender cómo la actividad cerebral integrada puede generar diversos comportamientos.
  • La investigación adicional puede basarse en Spaun para explorar funciones cognitivas más complejas y mecanismos neuronales.