UNIT 2: BIOLOGICAL BASES OF BEHAVIOR Flashcards
- LOBES OF THE BRAIN
Frontal Lobe
Executive function, higher level cognition
Parietal Lobe
Sensory Information
Occipital Lobe
Vision
Temporal Lobe
Sense of hearing/meaningful speech.
STRUCTURES OF THE BRAIN
Corpus Callosum
Connects two hemispheres
Medulla
Life sustaining functions, breathing, heart rate, blood pressure.
Cerebellum
Control coordination “balance”/voluntary movements.
Hypothalamus
Releasing hormones (regulate homeostasis of the body).
Hippocampus
Formation of memories
Amygdala “Fear Center”
Processing emotion and survival responses.
Neuroplasticity
Is the brain’s ability to constantly change both the structure and function of many cells in the brain.
Split Brain
Is the two hemispheres of the brain can’t communicate with each side (researched by Sperry and Gazzaniga).
Broca’s Area
Speech production
Wernicke’s Area
Comprehension of speech
Motor Cortex
Voluntary movement
Somatosensory Cortex
Receives and processes sensory information.
THE NERVOUS SYSTEM
Body’s communication network.
Central Nervous System
Brain and the spine
Peripheral Nervous System
Sensory nerves outside brain/spinal cord.
Somatic Nervous System
Voluntary moment from your brain to your muscles.
Autonomic Nervous System
Involuntary and unconscious actions (breathing, blood pumping, and etc).
Sympathetic Nervous System
Emergency response system “Fight, Flight, or Freeze”
Parasympathetic Nervous System
Calm a person “rest and digest”
THE NEURON
Dendrites
Receive message
Soma
Keep the neuron functional
Myelin Sheath
Protect nerve/speed up message
Axon
Carry messages
Axon Terminals
Send Signals
Neural Transmission
Information travels through a neuron electrochemically
Action Potential “Firing”
Neuron sends information
Resting Potential
Neuron is charge and ready to fire
All-or-None Principle
Neuron fires at full strength or not at all.
Neurotransmitters
Chemical messengers
Inhibitory Neurotransmitters
Prevent neurons from firing
Acetylcholine
Movement & memory
Serotonin
Mood
Dopamine
Pleasure chemical of the brain
Norepinephrine
Response to danger “flight or flight”
GABA
Calming the central nervous system
Glutamate
Thinking, memory, learning
Endorphines
Relieve pain and stress, feelings of pleasure/euphoria
Afferent Neuron
Sensory
neuron, sensory input to
spinal cord into the brain
Efferent Neuron
Motor neurons, carry signals away from central nervous system to initiate an action.
Inter-neuron
Middleman between the afferent and efferent neurons
Endocrine System
Glands that secrete chemical messengers called hormones
Pituitary Gland “Master Gland”
Controlled by the hypothalamus.
Nature
Genetics
Nurture
Environment
Identical Twins
Have the same DNA
Fraternal Twins
Have different DNA
Heritability
Extent to which differences in the appearance of a trait across several people can be accounted for by differences in their genes.
SLEEP CYCLES
Circadian Rhythm
24 hour cycle, body’s internal biological clock
Electroencephalography (EEG)
Test record electrical activity in the brain.
REM Sleep
Is your dream sleep. It is called Paradoxical sleep because brain waves are very active but muscles are paralyzed.
PSYCHOACTIVE DRUGS
Agonist
Mimic neurotransmitters
Antagonist
Block neurotransmitters
Depressants
Slow the activity of the central nervous system
Alcohol
Depresses the area of the brain that controls judgement and inhibition