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Organization of the Brain

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
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...

Functional Brain Systems: Reticular Formation

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...

Cerebrum: Anatomical Overview I

Cerebrum: Anatomical Overview I

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...

Functional Brain Systems: Limbic System

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...

Cerebrum: Anatomical Overview II

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...

Diencephalon: Anatomical Regions

Diencephalon: Anatomical Regions

The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the subthalamic...

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Related Experiment Video

Updated: Jul 11, 2026

Functional Magnetic Resonance Imaging (fMRI) with Auditory Stimulation in Songbirds

Functional Magnetic Resonance Imaging (fMRI) with Auditory Stimulation in Songbirds

Published on: June 3, 2013

ABCD: a functional database for the avian brain.

Aniko Schrott¹, Peter Kabai

¹Department of Ecology, Faculty of Veterinary Science, Szent Istvan Egyetem, Hungary. abcd.database@gmail.com

Journal of Neuroscience Methods

|September 25, 2007

Summary

The Avian Brain Circuitry Database (ABCD) is a new resource for neuroscience, detailing avian brain connectivity. It organizes information on brain regions, connections, and terminology to aid research.

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Area of Science:

Neuroscience
Comparative Neuroanatomy
Avian Biology

Background:

Understanding avian brain connectivity is crucial for neuroscience and comparative anatomy.
Existing data on avian brain connections are fragmented and lack standardized terminology.
A centralized resource is needed to consolidate and cross-reference this information.

Purpose of the Study:

To introduce the Avian Brain Circuitry Database (ABCD), the first database for avian brain connectivity.
To provide a comprehensive repository for avian brain region terminology, hierarchy, and connections.
To facilitate data sharing and network research in avian neuroscience.

Main Methods:

Data compilation from primary neuroscience literature and textbooks.
Development of a database storing information on brain areas, connections, and functional keywords.
Implementation of an online submission system for direct researcher contributions.

Main Results:

The Avian Brain Circuitry Database (ABCD) is now available, containing extensive connectivity data.
It includes both historical and current terminology for avian brain structures.
A functional keyword system links brain regions and their connections.

Conclusions:

The ABCD database serves as a vital tool for avian neuroscience research.
It promotes the dissemination of avian connectivity studies and revised nomenclature.
The database supports advanced brain network research in birds.