Theories Flashcards
Aggression
Behaviour intended to cause injury psychological or physical. Establish or maintain dominance
Frontal lobe
High order reasoning
Decision making
Impulse control
Parietal lobe
Sensation and movement
Temporal lobe
Emotion and memory
Occipital lobe
Vision
Limbic system
Regulate emotional responses
Hypothalamus
Controls Flights or fight
Spinal cord
Consist of nerves that carry incoming and outgoing messages between brain and the body
Dendrites
Receptors Receives neurotransmitters
Found on cell body
Axon
Carries electrical Impulse
Where is electrical Impulse generated
Axon hillock
Myelin sheath /terminal buttons
Insulates the axon
Have vesicles that contain neutransmittter that diffuse from presynaptic neuron to post
What needs to happen before Neurotransmission can take place
Btw _ mv to _mv
Neuron is resting negatively charged at -70mV
-70mV to -55mV reached voltage needed to fire
Eletrical signal travels down the terminal buttons where neurotransmitters are released
Excitation and inhibition
More positive more negative
Promote firing suppress firing
Cancellation
Both Excit and inhibit cancel each other out
Spatial summation
Excit potentials from many neurons trigger threshold
Temporal summation
Many excit potenticals from one neuron triggers threshold
Cocaine definition
Stimulant drug connects to frontal lobe
What is the part of the brain cocaine reaches
Nucleus accumbens
What is the nucleus accumbens linked too
Dopamine
Action of cocaine
Neurotransmitters is fired
Presynaptic neuron reabsorbed the excess dopamine back into cell
Cocaine then blocks the dopamine transporter
Causes a higher concentration dopamine to bind to postsynaptic neuron
Causinga feeling of pleasure
Long term effects of cocaine edut
Downregulated dopamine receptors
Fewer active receptors
Quantity of dopamine declines and experience withdrawal
Heroin
Opioid drug that slows down CNS activity including neurons that process pain
Where does heroin act on
Neurons with opoid receptors in cerebral cortex