Drugs Flashcards Preview

Neuroscience > Drugs > Flashcards

Flashcards in Drugs Deck (33)
Loading flashcards...
1

What is a psychoactive drug?

Substances that act to alter mood, thought, or behavior
Influence chemical signaling in the synapse

2

What type of drug suppresses mental function and produces calming effects through low doses, or results in intoxication through high doses?

CNS Depressant

3

What type of drugs stimulate arousal by giving your body a rapid, but temporary, boost of energy and clarity?

CNS Stimulants

4

What type of drug alters perceptual experience and disturbs your sense of reality?

Hallucinogen

5

What is an example of a CNS Depressant?

Alcohol, opiates, anxiolytics

6

What is an example of a CNS Stimulant?

Amphetamine, cocaine, caffeine, nicotine

7

What is an example of a Hallucinogen?

Marijuana, LSD, MDMA

8

The ingestion of psychoactive substances in moderate amounts in which the substance does not interfere with everyday function.

Substance Use

9

The use of a substance significantly interferes with the users life.

Substance Abuse

10

The state in which the user is psychologically and physiologically dependent on a drug - showing tolerance and withdrawal.

Substance Dependence

11

What is an Addiction?

Uncontrolled drug use that persists in spite of negative consequences associated with taking or obtaining the drug.

12

What is Tolerance?

The increase in required dose to obtain desired effect.

13

What is Withdrawal?

Physical and psychological behaviors that are displayed by an addict when drug use ends.

14

Withdrawal and Homeostasis

1. Brain normally exists in a state of drug-free homeostasis
2. Taking drug leads to an imbalance
3. Compensatory adaptations attempt to restore homeostasis
4. Quitting drugs leads to an imbalance in opposite direction - withdrawal

15

What is the term for diagnosing an addiction?

Substance Use Disorder

16

Whats are the DSM-5 requirements for diagnosing a Substance Use Disorder on top of maladaptive patterns of use?

1. Failure to fulfill major role obligations due to substance use
2. Spend great deal of time trying to get drug
3. Legal problems associated with substance
4. Cravings
5. Tolerance
6. Withdrawal

17

What is Reward?

Desirable or positive stimuli that can affect behavior

18

What is Intracranial Self-Stimulation?

A research model where a rat is fitted with an electrode located in certain parts of the brain which is connected to a level in the rat's cage.

19

What type of behavior did rats used in the ICSS model exhibit?

They would press the lever almost endlessly
They would ignore everything around them (food, water, sex) and focus only on the lever
They would eventually either collapse or need to be removed

20

What discovery did the ICSS lead to?

The Reward System

21

What is the Reward System?

A circuit in the brain that is responsible for rewarding behaviors and the accompanying sensations of pleasure - Mesocorticolimbic System

22

What is the pathway of the Mesocorticolimbic System and what Neurotransmitter is involved?

Ventral Tegmental Area (VTA) contains neurons that produce dopamine and whose axons project to the Prefrontal Cortex, Nucleus Accumbens, and Hippocampus

23

Which area of the Mesocortioclimbic System is involved in the feeling of subjective pleasure?

Nucleus Accumbens

24

Which area of the Mesocortioclimbic System is involved in learned association between rewarding feeling and specific stimuli?

Hippocampus

25

Which area of the Mesocortioclimbic System is involved in the cognitive control necessary to seek or avoid the rewarding stimulus?

Prefrontal Cortex

26

How is dopamine release in the Reward system used as a teaching signal?

Rewarding stimuli lead to encoding of associated features of the stimuli - the more we experience the stimuli the stronger these associations get and eventually turn into cues and can trigger an expectation which produces increase in DA release

27

What is the purpose of the Reward System?

Designed to motivate animals to engage in life-sustaining endeavors such as reproducing, eating, and maintaining social relationships

28

What is the effect of drugs on the mesocorticolimbic system?

Supraphysiological dopamine release in reward system leading to over-prioritization of behaviors associated with drug

29

What is cocaine?

A CNS stimulant which produces an increase in neural and behavioral activity

Highly addictive

30

Many physiological and psychological effects of cocaine resemble what happens when which nervous system is activated?

Sympathetic Nervous System