Exam 1: week 3 Flashcards
What are the different neurotransmitters that are released by neurons in the brain that pertain to mental health
- norepinephrine
- serotonin
- dopamine
- glutamate
- γ aminobutyric acid (GABA)
- acetylcholine
- epinephrine
What are the two ways that neurotransmitters are destroyed
Enzymes
- acetylcholinesterase breaks down acetylcholine
Reuptake
- excess neurotransmitters are absorbed back into the presynaptic neuron
- norepinephrine
What is insufficient transmission
When either there isn’t enough neurotransmitter released from presynaptic neuron or there is an issue with the receptors making them unable to bind enough neurotransmitter
What is the limbic system of the brain
Area of the cerebrum that plays a major role in emotional status and psychological function
Which neurotransmitters are active in the limbic system of the brain
- norepinephrine
- serotonin
- dopamine
What is the function of the brain stem
Processes sensory information then passes that information to the limbic system
What is the function of the hypothalamus
- basic drives
- link between thought and emotion
- function of internal organs
What is the function of the cerebellum
- coordinates smooth muscle
- regulates skeletal muscle
- maintains equilibrium and balance
What is the function of the cerebrum
- consciousness
- emotional status
- memory
- skeletal muscle movement
- language/communication
What are the three ways we can visualize the brain
- electrical
- structural
- functional
What does electrical visualization of the brain entail
Shows the electrical signals in the brain
- electroencephalography (EEG)
What is an EEG
An electrical method of visualization of the brain that shows the state a person is in and supports the identification of brain abnormalities
What are structural imaging techniques for visualizing the brain
Provide overall images of the brain and its layers
- can reveal schizophrenia and cognitive disorders
- computed tomography (CT)
- magnetic resonance imaging (MRI)
What is a CT
An xray showing slices of the brain. It is done fast (2.5 minutes) and can be used in an urgent situation.
Can see:
- large masses
- bleeds
- lesions
- infarcts
What is an MRI
A detailed imaging technique using magnetic fields. This takes longer than a CT (30-60 minutes).
Can see:
- edema
- trauma
- ischemia
- neoplasms
What are the functional imagine techniques for visualizing the brain
Reveals the physiological activity of the brain
- can detect schizophrenia, mood disorders, and adult ADHD
- functional magnetic resonance imaging (fMRI)
- positron emission tomography (PET)
- single photon emission computed tomography (SPECT)
What is an fMRI
Visualizes brain activity through blood O2
What is a PET scan
A tracer is injected to show the activity of the brain through a 3D image of the brain
What is SPECT
Just like a PET scan but shows the activity of each brain layer as well as the whole brain
What occurs with too much acetylcholine
Depression
What does acetylcholine do in the brain
- learning
- memory
- regulates mood
- affect sexual behavior
- affect aggressive behavior
- stimulates parasympathetic nervous system
What occurs with too little acetylcholine
- dementia
- Alzheimer’s
- Huntington’s
- Parkinson’s
What does dopamine do in the brain
- fine muscle movement
- integrates emotions and thoughts
- decision making (frontal lobe)
- Stimulates hypothalamus to release hormones
What occurs with too much dopamine
- schizophrenia
- mania
What occurs with too little dopamine
- ADHD (frontal cortex)
- Parkinson’s (substantia nigra in the midbrain)
What does serotonin do in the brain
- sleep regulation
- hunger
- mood
- pain perception
- hormonal activity
- aggression
- sexual behavior
What occurs with too little serotonin
- depression
- OCD
What occurs with too much serotonin
anxiety
What does GABA do in the brain
- inhibition of aggression, anxiety, and excitation
- anticonvulsant properties
- muscle relaxant properties
What occurs with too little GABA
- anxiety
- schizophrenia
- mania
- Huntington’s
What occurs with too much GABA
anxiety reduction
What does norepinephrine do in the brain
- mood
- attention
- arousal
- stimulates sympathetic “fight-or-flight”
What occurs with too little norepinephrine
depression
What occurs with too much norepinephrine
- schizophrenia
- mania
- anxiety
What does glutamate do in the brain
- learning
- memory
- excitatory
What occurs with too little glutamate
psychosis
what occurs with too much glutamate
- Alzheimer’s
- neurotoxic
What occurs with too little epinephrine
depression
What occurs with too much epinephrine
anxiety
What is pharmacodynamics
what drugs do in the body and how they do it
What is pharmacokinetics
Movement of the drug through the body
- Absorption
- Distribution
- Metabolism
- Excretion
What are benzodiazepines
Drugs that promote activity of GABA and has a calming effect
- anti-anxiety
- hypnotic
- anticonvulsant
- amnestic
- muscle relaxant
- addictive
What are some common benzodiazepine drugs for anxiety
All are schedule c-IV according to the DEA
- diazepam (Valium)
- clonazepam (Klonopin)
- alprazolam (Xanax)
- lorazepam (Ativan)
What is the scale used to determine if a patient has an anxiety disorder
SWICKIR anxiety scale; worries plus 3 additional symptoms for at least 6 months
S- somatic symptoms
W- worries
I- irritability
C- concentration
K- keyed-up/on edge
I- initial insomnia
R- relaxation difficulties