Related Experiment Video
Updated: Mar 20, 2026
05:30
Controlled Cortical Impact Model for Traumatic Brain Injury
Published on: August 5, 2014
29.9K
Catecholamines and cognition after traumatic brain injury.
Peter O Jenkins1, Mitul A Mehta2, David J Sharp3
11 The Division of Brain Sciences, The Department of Medicine, Imperial College London, UK.
Brain : a Journal of Neurology
|June 4, 2016
Summary
Traumatic brain injury often causes cognitive problems. Targeting catecholamine systems, like dopamine and noradrenaline, with drugs may help, but individual responses vary, necessitating personalized treatment strategies.
Area of Science:
- Neuroscience
- Neuropharmacology
- Cognitive Science
Background:
- Cognitive deficits are a primary cause of disability post-traumatic brain injury (TBI).
- Heterogeneity in TBI and resulting cognitive impairments complicates treatment.
- Disruption of neuromodulatory neurotransmitter systems, particularly catecholamines, contributes significantly to cognitive impairment after TBI.
Purpose of the Study:
- To review the evidence implicating catecholamine system disruption in TBI-related cognitive deficits.
- To evaluate the efficacy of catecholaminergic drugs for treating post-TBI cognitive impairments.
- To explore advanced imaging techniques for personalized TBI treatment.
Main Methods:
- Review of existing evidence on catecholamine systems and TBI.
- Analysis of the efficacy of catecholaminergic drugs.
- Discussion of advanced structural and molecular imaging techniques.
- Assessment of structural and functional connectivity measures.
Main Results:
- Catecholamine (dopamine and noradrenaline) disruption is a key factor in TBI cognitive impairment.
- Catecholaminergic drug efficacy is variable due to injury heterogeneity and non-linear drug effects.
- Individual variability in treatment response highlights the need for personalized approaches.
Conclusions:
- Targeted treatment for cognitive enhancement post-TBI requires understanding underlying pathology.
- Advanced imaging can identify catecholaminergic system disruption and guide therapy.
- Measuring catecholamine levels and network connectivity may enable stratified treatment selection and monitoring.
Related Concept Videos
01:30Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
807
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
807
01:27Adrenergic Neurons: Neurotransmission
5.7K
Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism.
Synthesis: Catecholamine synthesis requires tyrosine, which...
Synthesis: Catecholamine synthesis requires tyrosine, which...
5.7K
01:21Drugs Affecting Neurotransmitter Release or Uptake
1.8K
Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
1.8K
01:20Traumatic Memory
667
Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
667
01:25Adrenergic Agonists: Indirect-Acting Agents
3.0K
Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
3.0K
01:14Role of Cerebellum and Prefrontal Cortex in Memory
1.4K
The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
1.4K