Neuroscience Flashcards
the biology of mind
neuroscience
belief feeling bumps on someone’s head to tell personalities, skull forms around the brain ~ the areas with the biggest bumps tell something about you
phrenology
who created the idea of phrenology
Franz Gall
what was the importance of phrenology?
introduced us to brain localization
different areas of the brain do different things
brain localization
which two things disconnected in the case of phineas gage?
frontal lobes and amygdala
how was phineas gage psychologically?
all over the place, emotions were everywhere
what happened between phineas gage’s frontal lobes and amygdala?
they were severed and couldn’t control eachother
the case of phineas gage tells us more about _____ _____?
brain localization
when was the case of phineas gage?
1848
staining cells to look at characteristics?
cajal
when was cajal used?
1887
neurons are individual units that “talk to” eachother
neurone doctrine
how many billion neurons and glial cells?
each 80-100 billion
what are the two components of a neuron?
- cell body
2. fibers
where all basic functions within a cell occur
cell body
(fibers)- receives signals from memories?
dendrites
(fibers)- transmits out signals?
axon; myelin sheath
disease where the myelin sheath erodes
MS; multiple sclerosis
information travels through an impulse that travels down an axon
neuron transmission
neurons communicate over a gap called…
a synapse
four steps of a neural connection
- action potential (AP) travels down the axon
- the AP causes a neurotransmitter to be released
- neurotransmitter crosses the synapse and binds to the receptor site on a receiving neuron
- causes the AP to be generated in the receiving neuron
the sending of neurons absorbs any excess neurotransmitters
reuptake
how many neurotransmitters; how many major
over 100; 21 major
large molecule neurotransmitters
neuropeptides
small molecule neurotransmitters
individual amino acids
mimics neurotransmitters, sometimes the brain is fooled
agonist
substance can block neurotransmitters
antagonist
type of neurotransmitters (1/7)- controls muscular movement; ex: venom
ACh (acetylcholine)
type of neurotransmitters (2/7)-controls movement, regulation of emotion; ex: Parkinson’s
dopamine
type of neurotransmitters (3/7)- related to mood, stronger than dopamine; ex: depression, skits
serotonin
type of neurotransmitters (4/7)- how alert you feel; ADHD, drowsy
norepinephrine
type of neurotransmitters (5/7)- regulates the levels of all the others, proper balance, regulator
GABA
type of neurotransmitters (6//7)- related to memory, essential for memory
glutamate
type of neurotransmitters (7//7)- to fight off painful sensations, related to mood a ~little~ bit; ex: heroin
endorphins
two components of the nervous system-
- central (CNS)
2. peripheral (PNS)
subcomponents of the CNS-
- brain
2. spinal cord
subcomponents of the PNS-
- somatic (conscious)
2. automatic (unconscious)
(ANS)- charges up your body, adrenaline
sympathetic
(ANS)- calms down your body
parasympathetic
three types of neurons-
- sensory neurons
- motor neurons
- interneurones
(neurons)- nerve cells within the nervous system responsible for converting external stimuli from the organism’s environment into internal electrical impulses
sensory neurons
(neurons)- sends messages to muscles, voluntarily
motor neurons
(neurons)- processing; thought, perception
interneurons
what are the six glands of the endocrine system?
- thyroid
- parathyroid
- adrenal
- pancreas
- every/testis
- pituitary gland
(endocrine system)- regulates the body’s metabolism
thyroid
(endocrine system)- regulates the calcium and potassium levels
parathyroid
(endocrine system)- regulates the ~adre~niline gland
adrenal
(endocrine system)- secrete insulin, regulates blood sugar level
pancrease
(endocrine system)- sexual reproduction
ovary/testis
(endocrine system)- mastery gland, sends messages trying to regulate other glands
pituitary gland
explain how the pituitary gland relates to growth hormones
growth hormones only happen at night, which is why doctors are worried about kids who are sleep deprived
what controls the pituitary gland?
hypothalamus
(true or false)- we only use 10% of our brain
false
how much of our brain do we use? __-__%
90-98%
three ways to look at the brain
- clinical observation
- EEG
- brain imaging techniques
(brain imaging)- tells us about structure and what they are doing
fMRI (functional magnetic resonance imaging)
(brain imaging)- trace brain wiring
diffusion spectrum imaging
two components of the brain structure-
- lower brain
2. higher brain
lower brain are found in _____; higher brain found in _____
other species; certain species
four components of the lower brain
- brainstem
- thalamus
- cerebellum
- limbic system
three components of the brain stem
- medulla
- pons
- reticular formation
(brainstem)- take care of the heart beat and respiration
medulla
(brainstem)- help coordinate movement, regulate sleep
pons
(brainstem)- regulate physiological arousal
reticular formation
(brain structure)- takes signals from all 5 senses from neurons, receives signals and lays them out to higher levels with work on
sensory switchboard of the brain
(brain structure)-
- coordinates movement
- controls balance
- primitive memory system, basic skills are stored here
cerebellum
three components of the limbic system-
- hippocampus
- amygdala
- hypothalamus
(limbic system)- transfers information from your short term memory to your long term memory
hippocampus
(limbic system)- emotional center of the brain, regulating emotions
amygdala
(limbic system)- involved in bodily maintenance
ex. hunger and thirst, body temperature, regulate sexual behavior
hypothalamus
the higher brain is the _____
cortex
the four regions of the higher brain
- frontal
- parietal
- temporal
- occipital
grey matter are the _____
cell bodies
white matter are the _____
axons
the four functions of the cortex
- motor functions
- sensory functions
- association functions
- language
(functions of the cortex)- motor neurons in the cortex that send messages down to the body; such as muscles
motor functions
(functions of the cortex)- thalamus with route to visual cortex; such as the auditory cortex
sensory functions
(functions of the cortex)- regulates emotions; such as memory, problem solving
associated functions
(functions of the cortex)- sets us apart from other species, has three functions
language
three components of language-
- Broca’s area
- Wernickle’s area
- angular gyrus
(language)- gives us the ability to speak
Broca’s area
language)- gives us the idea to understand speech
Wernickle’s area
language)- gives us the ability to read and understand letters
angular gyrus
the ability for the brain to repair itself after damage
brain plasticity
at what age would brain plasticity be easier?
at a younger age
production of new neurons, seen mostly in the hippocampus
neurogenesis
the brain is divided into two hemispheres and are connect by the corps callosum
brain lateralization
(brain lateralization)- side that deals with language, analytic reading, word processing
left hemisphere
(brain lateralization)- side that deals with music, facial recognization, expressions of emotion, picture processing, subtle interfacing in language, self-awareness
right hemisphere