The Microbiota-Brain Connection

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Questions and Answers

What are psychobiotics?

Digestible microorganisms that provide health benefits (correct)
Foods that contribute to showing signs of disorders
Non-digestible substances that stimulate beneficial bacteria
Bacterial species essential for maturation of essential systems

What is the role of psychobiotics in influencing mental health, cognitive function, and behavior?

Inducing gut dysbiosis leading to mental disorders
Regulating neuroimmune axes through interaction with commensal gut bacteria (correct)
Directly affecting neurotransmitter levels in the brain
Stimulating excessive production of harmful gut bacteria

What are prebiotics?

Bacterial species essential for maturation of essential systems
Digestible microorganisms that provide health benefits
Stimulating beneficial bacteria that help maintain gut health (correct)
Foods that contribute to showing signs of disorders

What do psychobiotics include?

Foods like kombucha, kimchi, and yogurt (D) Signup and view all the answers

What do probiotic bacteria do in influencing the brain-gut axis?

Produce neuroactive substances (B) Signup and view all the answers

What is the role of incentive salience in hedonic hotspots?

Causing stimuli to seem attractive by attributing a sense of desirability through mesolimbic dopamine neurotransmission (D) Signup and view all the answers

What is anhedonia?

The lack of pleasure, a symptom of many mental illnesses including depression (B) Signup and view all the answers

How do hedonic hotspots interact to enhance 'liking' reactions?

By forming a functional integrated circuit and requiring multiple unanimous 'votes' from participating hotspots (A) Signup and view all the answers

What is the relationship between hedonic hotspots and the default network?

Bridging hedonia and eudaimonia (B) Signup and view all the answers

What is the impact of loss of pleasure termed as?

Anhedonia (D) Signup and view all the answers

What plays a role in causing stimuli to seem attractive?

Mesolimbic dopamine neurotransmission (B) Signup and view all the answers

Which type of cherry showed benefits in sleep, with effects varying based on cherry cultivar?

Montmorency tart cherry (C) Signup and view all the answers

What was associated with less time spent in N3 sleep stage?

Saturated fat intake (D) Signup and view all the answers

What was linked with increased arousal during sleep?

Sugar intake (B) Signup and view all the answers

Which lifestyle factor was associated with increased time in N3 sleep stage?

Consuming more fiber (C) Signup and view all the answers

What has a strong association with depression, schizophrenia, and psychosis?

Smoking (B) Signup and view all the answers

What significantly increases the risk of clinical depression and bipolar disorder?

Sleep disturbances (D) Signup and view all the answers

What is the impact of aberrant light exposure on mood?

It affects mood through direct and indirect connections with the brain (C) Signup and view all the answers

What is the definition of good sleep?

Low sleep latency, low number of awakenings, and sleeping 7-9 hours (C) Signup and view all the answers

What is the impact of prolonged jet lag on cognitive function?

It leads to impairments in learning, memory, and cognitive deficits (A) Signup and view all the answers

What is the role of circadian genes in mood regulation?

Circadian genes play critical roles in mood regulation (D) Signup and view all the answers

What effect does tryptophan consumption have on sleep?

It increases total sleep time, improves sleep efficiency, and makes falling asleep easier (B) Signup and view all the answers

How does light exposure affect the circadian system?

Intrinsically photosensitive retinal ganglion cells (ipRGCs) suppress melatonin and make the circadian system respond to light (B) Signup and view all the answers

Which of the following is true about the role of microbiota in affecting mood and behavior?

Microbiota produce neurotransmitters such as serotonin and norepinephrine, which affect mood, behavior, and gut motility (C) Signup and view all the answers

How does L. rhamnosus administration affect anxiety and depression in mice?

L. rhamnosus administration in mice reduced anxiety/depression and downregulated HPA axis (D) Signup and view all the answers

What is the impact of probiotic presence on GABA expression in the hippocampus?

Probiotic presence led to lower GABA expression in the hippocampus, modulating stress/anxiety/depression (C) Signup and view all the answers

How do psychobiotics impact the gut microbiome and mental health disorders?

Psychobiotics can alter gut microbiome to treat mental health disorders and strengthen memory (C) Signup and view all the answers

What is the role of prebiotic intake in physiological system development?

Prebiotic intake is important for normal physiological system development and has neuroprotective effects (C) Signup and view all the answers

Which system regulates circadian rhythms and food-entrainable oscillators?

Circadian rhythms are regulated by the suprachiasmatic nucleus (SCN) and food-entrainable oscillators (C) Signup and view all the answers

Flashcards

Psychobiotics

Digestible microorganisms offering health benefits.

Psychobiotics Role

They regulate neuroimmune axes via gut bacteria interaction.