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Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is to...
Dementia l: Introduction01:22

Dementia l: Introduction

Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
Parkinson's Disease: Treatment01:24

Parkinson's Disease: Treatment

Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of its...
Long-term Potentiation01:35

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...

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A Novel and Translational Rat Model of Concussion Combining Force and Rotation with In Vivo Cerebral Microdialysis
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Persistent cognitive dysfunction after traumatic brain injury: A dopamine hypothesis.

James W Bales1, Amy K Wagner, Anthony E Kline

  • 1Brain Trauma Research Center, University of Pittsburgh, PA 15260, USA.

Neuroscience and Biobehavioral Reviews
|July 8, 2009
PubMed
Summary
This summary is machine-generated.

Traumatic brain injury (TBI) impacts cognitive function. Dopamine (DA) therapies show promise for improving attention, executive function, and memory after TBI, though optimal treatment timing requires further research.

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Related Experiment Videos

Last Updated: Jun 21, 2026

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Published on: July 12, 2019

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07:54

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Neurology

Background:

  • Traumatic brain injury (TBI) is a major cause of death and disability.
  • Chronic cognitive deficits are a significant concern for TBI patients.
  • Evaluating TBI therapies is challenging due to injury complexity and patient variability.

Purpose of the Study:

  • To review clinical and experimental research on dopamine (DA) therapies post-TBI.
  • To clarify the role of DA in cognitive function and dysfunction after TBI.
  • To identify research gaps regarding DAergic treatments for TBI.

Main Methods:

  • Review of clinical studies on DAergic pharmacotherapies for TBI.
  • Analysis of experimental research in animal models of TBI.
  • Examination of the pathophysiology of DA alterations following TBI.

Main Results:

  • Dopamine (DA) targeting pharmacotherapies consistently demonstrate benefits in attention, executive function, and memory.
  • Research is beginning to elucidate the specific TBI pathologies affected by DA alterations.
  • The optimal timing for DAergic treatment interventions remains to be fully determined.

Conclusions:

  • Dopamine plays a crucial role in cognitive recovery after TBI.
  • Further research is needed to optimize DAergic therapeutic strategies for TBI patients.
  • Understanding the time-course of DA alterations is key to effective treatment.