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Related Concept Videos

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
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...
Diencephalon: Anatomical Regions01:30

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...
Diencephalon: Hypothalamus and Coordination01:23

Diencephalon: Hypothalamus and Coordination

The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...
Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological states or needs.
Brainstem01:19

Brainstem

The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...

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Related Experiment Video

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Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area
09:54

Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area

Published on: August 10, 2012

Dopamine systems in the forebrain.

John W Cave1, Harriet Baker

  • 1Department of Neurology and Neuroscience, Weill Cornell Medical College, Burke Medical Research Institute, White Plains, NY 10606, USA.

Advances in Experimental Medicine and Biology
|September 8, 2009
PubMed
Summary
This summary is machine-generated.

Dopamine (DA) interneurons in the olfactory bulb (OB) are crucial for detecting odors. Most of these neurons are generated after birth from stem cells and may offer therapeutic potential for neurological disorders.

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09:54

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Area of Science:

  • Neuroscience
  • Neurobiology
  • Cellular Biology

Background:

  • The brain utilizes dopamine (DA) in various regions, with the olfactory bulb (OB) housing a significant forebrain DA system.
  • OB DA cells, primarily periglomerular interneurons, are vital for odor discrimination and detection range.
  • These neurons originate from distinct embryonic regions but are predominantly generated postnatally from neural stem cells.

Purpose of the Study:

  • To investigate the developmental origins and characteristics of dopamine (DA) interneurons in the olfactory bulb (OB).
  • To explore the potential of adult-born OB DA neurons in the context of neurological diseases like Parkinson's disease.
  • To identify molecular genetic pathways regulating OB DA interneuron differentiation.

Main Methods:

  • Analysis of OB DA neuron development and origin from embryonic and postnatal sources.
  • Investigation of adult neurogenesis in the OB subventricular zone and rostral migratory stream.
  • Identification and study of genes, including transcription factors, involved in DA interneuron differentiation.

Main Results:

  • OB DA interneurons are generated both embryonically and postnatally, with significant adult neurogenesis occurring.
  • Adult-born OB DA neurons integrate into existing neural circuits and are resistant to degeneration in Parkinson's disease models.
  • Key genes and transcription factors regulating tyrosine hydroxylase expression and DA phenotype have been identified.

Conclusions:

  • The olfactory bulb's dopamine system is dynamically regulated by adult neurogenesis.
  • Adult-born OB DA neurons represent a potentially resilient cell population for therapeutic strategies.
  • Understanding the genetic regulation of OB DA neuron differentiation is crucial for developing treatments for neurological disorders.