Psychology and Sociology Flashcards
layers of the skull
skin, periosteum, bone, dura mater, arachnoid matter, pia matter
primary motor cortex location
precentral gyrus just in front of central sulcus tat divides frontal and parietal lobes, it initiates voluntary motor movement by sending neural impules down spinal cord, some areas take up more space than others depending on need for fine motor control
broca’s area
most commonly on left side of frontal lobe (though can be on right depending on dominance) fundamental to speech formation
somatosensory cortex
located on the psotcentral gyrus just behind the central sulcus part of the parietal lobe part of somatocsensory information processing
wernicke’s area
associated with language reception and comprehension on the temporal lobe, usually on the left side dominant hemisphere
basal ganglia
helsp mainain smooth movemens and maintain postural stability, with loss of the dopaminergic neurons in the basal ganglia will see parkinsons
dopamine and schizophrenia
theory that this mental illness occurs due to too much dopamine or oversensitivity to it in the brain
GABA and glycine
gamma aminobutyric acid produces inhibitory post synaptic potentials thought to play a role in stabilizing neural activity in the brain, causes hyperpolarization of the psotsynaptic membrane, glycnie increase chloride influx into neuron also hyperpolarizing
glutamate
excitatory neurotransmitter has numerous functions in the body including bonding ndma receptors
innate behavior vs learned behavior
genetically programmedas a result of evolutionand seen in individuals regardless of environment or experiences, vs based on experience and environment
family studies
assume thatgenetically related individuals are more similar genotypically than unrelated individuals so researcher compare rates of a given trait among family members to those among unrelated individuals, limited in that they annot distinguish environental factors from genetic factors
twin studies
compare concordance rates (likelihood of both twins exhibiting same trait) between identical and fraternal twins
primitive reflexes that dissapear with age
rooting reflex - automatic turning of head in direction of stimulus that touches cheek such as nipple during feeding
moro - flinging arms out in response to abrupt movements of their head
babinski - toes spread apart when sole of foot is stimulated
grasping reflex - fingers close arond objects placed in hands
sensation vs perception
sensation aligns with transduction which is conversion of physical stimuli of the external environment into electrical signals of the nervous system. Perception is processing this information to make sense of its significance
common types of sensory receptors
photoreceptors - respond to EMS waves
hair cells - respond to movement of fluid in inner ear structures
nociceptors - respond to pain or noxious stimuli
thermoreceptors - respond to changes in temp
osmoreceptors - respond to osmolarity of blood
olfactory receptors - respond to scent
taste receptors - respond to dissolved compounds
types of threshold (3)
absolute - minimum stimulus energy needed to activate sensory system, does not always impact perception** think subliminal
threshold of conscious perception - the threshold to cause conscious acknowledgement of a stimulus
Difference threshold - minimum difference in maagnitude between two stimuli before one can perceive the difference
weber’s law
there is a constant ratio between the change in stimulus magnitude needed to produce a just-noticable-differenece and the magnitude of the original stimulus, generally accurate for all sensory modalities except extreme high and low ends of each range
rods and cones
cones are used for color vision and see small fine details, rods are for reduced light permitting night vision
the medial receptors of the eye (which are seeing the temporal vision) do what at the optic chiasm
cross, then they become part of the optic tract
parallel processing
ability to simultaneously analyze and cobine info regarding color, shape, and motion, when compared to our memories to determien what is being viewed
ciliary body and cilliary muslce
produces aqueous humor that bathes the front part of the eye before draining into canal of schlemm, muscle is under parasympathetic control and as it contracts it pulls on suspensory ligaments to change shape of lens allowing for accomodation
vitrious humor
transparent gel that supports the retina
3 ossicle bones and their order
tympanic membrane, malleus, incus, stapes oval window
parts of the inner ear (3)
cochlea - hearing apparatus with organ of corti on a baasilar membrane with hair cells bathed in endolymph, has a round window to permit movement
vestibule - utricle and saccule for linear accelerations with otoliths that resist with motion
semicircular canals - rotational accelearation judged by swelling on the end called ampulla with hair cells so that different rotations can be detected
lateral geniculate nucleus of thalamus receives ___ sensory info, while medial geniculate nucleus receives ____
visual, auditory
smell pathway
nose to olfactory receptros on olfactory nerves which then send signals to the olfactory bulb and relay this to the olfactory tract which goes to the rest of the brain
4 different somatosensation types
pressure, vibration, pain, and temp
habituation
repeated exposure to the same stimulus causing a decrease in response
Dishabituation
recovery of repsonse to a stimulus after habituation has occurred, often happening when a 2nd stimulus is presented that interrupts the already habituated process thereby causes an increase in response to the ORIGINAL stimulus***
associative learning
pairing between stimuli or behavior and response, two types classical and operant conditioning
classical conditioning
works because first and foremost some stimuli cause innate or reflexive physiological response (salivating at smell of bread or sight of my beautiful wife or recoiling when hearing a loud noise), this is an unconditioned stimulus and unconditioned response. Stimuli that don’t produce a reflexive response are neutral stimuli. Neutral stimuli can be converted into conditioned stimuli that thru association causesa a reflexive conditioned response.
classical conditioning is also called
acquisition
extinction
if a conditioned stimmulus is presented without the unconditioned stimulus enough times, the organism can be habituated to the conditional stimulus and stop a conditioned response
spontaneous recovery
in case of extinction of a conditioned response, it is not always permanent sometimes if a conditiond stimuus is presented again after some time a weak conditioned response can be exhibited
generalization vs discrimination
broadening effect by which a stimulus similar enough to the conditioned stimulus can also produce a conditioned response (little albert)
an organism learns to distinguish between two similar stimuli
operant conditioning
links voluntary behavior with consequences in effort to alter frequency of those behaviors - positive reinforcement adding a positive consequences, negative reinforcement by removing something unpleasant, positive punishment adding an unpleasant consequence to behavior, negative punishment removing a pleasant stimulus as a consequence of behavior
2 types of negative reinforcement
escape learning - behavior to reduce unpleasantness of something that already exists like aspirin for a headache
avoidance learning - prevent unpleasantness of something that has yet to happen
reinforcemen schedules (4)
fixed ratio - reinforce a behavior after specific number of performances of that behavior, can be continuous if it is every time
variable ratio - random intervals
fixed interval - reinforce a behavior after a specified time period has elapsed
variable interval - reinforce a behavior after a variable interval of time
what reinforcement schedule works fastest for learning new behavior and is most resistant to extinction
variabler atio
shaping
process of rewariding increasingly specific behaviors
latent learning
learning that occurs without a reward but that is spontaneously demonstrated once a reward is introduced
preparedness
idea that not all behaviors can be taught using operant conditioning as many animals are predisposed to learn something based on their own natural abilities and instincts, (you can’t train a raccoon to place coins in a piggy bank as it goes against their natural food gathering instinct
difficulty in overcoming instinctive behaviors is
instinctive drift
observational learning
leaning new behavior or gaining info by watching others, different than imitation because can be used to teach individuals to avoid behavior as well if they see bad consequences
mirror neurons
located in frontal and parietal lobes of cerebral cortex that fire both when an individual performs an action and when that individual observes someone else performing that action
encoding
processof putting new information into memory, either automatic processing (abosrbed passively from environment) and controlled processing (trying to memorize)
different types of encoding
visual, acoustic, or semantic (put it into meaningful context, this is the stronges and visual encoding is the weakest)
self reference effect
we tend tor ecall info best when we can put it into the context of our own lives
maintenance rehearsal
repetition of a piece of info to keep it wihint the working memory to rpevent forgetting or to store it in short term and eventually long tem memory
method of loci
involves asociating each item in a list with a location along a route through a building that has already been memorized
peg word system
associates number with items that rhyme or resemble the numbers
chunking or clustering
memory trick that involves taking individual elements of a large list and grouping them together into groups of elements with related meaning
sensory memory
very short term memory generally under 1 second consisting of iconic (visual) and echoic (auditory) memory
short term memory
fades quickly over 30 seconds without rehearsal, typically liited in capacity to approx 7 items (7 + or - 2 rule), housed in hippocampus
working memory
similar to short term memroy, enables to keep a few pieces of info in our conscious simultanesously and to manipulate that information (simple math in head)
long term memory
moved from hippocampus to cerebral cortex, uses elaborative rehearsal which is association of information to knowledge already s tored in long term memory
2 types of longterm memory
implicit - our skills and conditioned responses
explicit - require conscious recall, either semantic (facts) or episodic (experiences)
retrieval
name given to process of demosntrating that something has been learned and retained
recognition
identifying a piece of info previously learned far easier than recall
relearning
idea that it is easier to rememorize a list muc more quickly 2nd time thru, as well as that spacing effect longer time between sessions improves retention of info later on
spreading acivation
idea that when one node of our semantic network is activated such as seeing the word red on a sign, other linked concepts around it are unconsciously activated known as spreading activation