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Anatomy of the Brain
Various parts of the brain, neurons, neurotransmitters, and their functions.
52
Psychology
Undergraduate 1
04/24/2006

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Term
Cerebral Cortex
Definition
Primary motor area, somatosensory area, visual area, auditory, and association.
Term
Corpus Callosum
Definition
Connects Two Hemispheres of the brain
Term
Hippocampus
Definition
Memory, especially episodes
Term
Amygdala
Definition
mediating emotion, especially fear
Term
Thalamus
Definition
Directs incoming information from the sense receptors to the cerebrum; helps control sleep and wakefulness
Term
Hypothalmus
Definition
Mediates eating, drinking and sexual behavior; regulates endocrine activity and maintains homeostasis; has a part in emotion and response to stress.
Term
Cerebellum
Definition
Concerned with the coordination of movement and motor learning.
Term
Reticular formation
Definition
Helps control arousal and focus attention on specific stimulii
Term
Medulla
Definition
Controls breathing and reflexes to help maintain upright posture.
Term
Somatic system
Definition
Carries messages to and from teh sense receptors, muscles and surface of the body.
Term
Autonomic system
Definition
Connects with the internal organs and glands.
Term
Central core
Definition
Regulates primitive behaviors
Term
Limbic system
Definition
Controls emotions
Term
Cerebral cortex
Definition
Outer Layer of cerebrum "gray matter"
Term
Central sulcus
Definition
groove that separates frontal lobe from rest of brain.
Term
Primary Motor Area
Definition
Directly in front of central fissure, different areas of PMA cause different body parts to move.
Term
Primary Somatosensory Area
Definition
Opposite side of central fissure from Primary motor area, Different areas of PSA connected to senses of different parts of body.
Term
Primary Visual area
Definition
At back of each occipital lobe.
Term
Primary Auditory Area
Definition
Located at the side of each hemisphere. Different areas represent different tones.
Term
Left Hemisphere
Definition
Right visual field, Main language center, calculation, speech writing, olfaction left nostril
Term
Right hemisphere
Definition
Left visual field, nonverbal ideation, spacial construction, olfaction right nostril.
Term
aphasia
Definition
language deficits caused by brain damage
Term
Weinicke Area
Definition
Temporal lobe of left hemisphere, understanding of verbal communication.
Term
sympathetic nercous system
Definition
active during intense arousal
Term
parasympathetic nervous system
Definition
associated with rest
Term
hormones
Definition
chemicals secreted by the endocrine glands into the bloodstream and transported to other parts of teh body, where they have specific effects on cells that recognize their message.
Term
Behavior genetics
Definition
Combines the methods of genetics and psychology to study the inheritance of behavioraal characeristics.
Term
sexual selection
Definition
yields traits that promote reproductive success in the sex with the greater potential reproductive rate.
Term
Acetylcholine
Definition
connected to alzheimer's disease, controls muscles, some nerve gases block the release which results in you stopping breathing.
Term
Norepinephrine
Definition
Connected to mood, Cocaine and amphetamines increase amounts by slowing reuptake, lithium speeds up reuptake
Term
Dopamine
Definition
Intense feelings of pleasure, connected to addiction, schizophrenia (too much), parkinsons disease (too little)
Term
Serotonin
Definition
mood regulation, low levels connected to depression, lsd binds to it
Term
Glutamate
Definition
depolarizes neurons, schizophrenia
Term
GABA
Definition
Gamma-aminobutryric acid, inhibitory transmitter.
Term
Neuron
Definition
a specialized cell that transmits neural impulses or messages to other neuron, glands, and muscles
Term
dendrites
Definition
receive neural impulses from adjacent neurons.
Term
axon
Definition
slender tube that extends from teh soma and transmits messages to other neurons
Term
synapse
Definition
slight gap between the terminal button and the cell body or dendrites of the receiving neuron
Term
neurotransmitter
Definition
a chemical that diffuses across the synaptic gap and stimulates the next neuron
Term
nerve
Definition
a buncle of elongated axons belonging to hundreds or thousands of neurons
Term
glial cells
Definition
nonneural cells in the nervous system, glue/padding
Term
action potential
Definition
an electrochemical impulse that travels from teh cell body down to the end of the axon
Term
ion channels
Definition
doughnut shaped protein molecules that form pores across the cell membrane, regulate flow of ions such as NA, K, Ca, and Cl
Term
resting membrane potential
Definition
electrical potential of a neuron at rest
Term
saltatory conduction
Definition
nerve impulse jumps from one node of ranvier to the next
Term
node of ranvier
Definition
gap between myelin sheathes
Term
myelin sheath
Definition
glial cell wrapped around axon which speeds up electrical transmissions
Term
receptors
Definition
proteins lodged in the dendritic membrane of the receiving or postsynaptic neuron
Term
excitatory effect
Definition
depolarizes neuron
Term
inhibitory effect
Definition
hyperpolarizes neuron
Term
reuptake
Definition
reabsorption of the neurotransmitter by the synaptic terminals from which it was released
Term
degredation
Definition
the reaction of enzymes in a synaptic gap with the neurotransmitter to break it up chemically and make it inactive
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