behavioral Flashcards
what is functionalism
how mental processes help people adapt to environment
what are the functions of the forebrain (cerebral cortex, basal ganglia, limbic system, thalamus, hypothalamus) what is the limbic system comprised of
cerebral - complex cognitive and behavioral processes basal ganglia - smooth movement limbic - emotion and memory thalamus - sensory relay hypothalamus - hunger, thirst and heightened emotion (the four F’s - feeding, fighting, flighting, sexual functioning) - septal nuclei, amygdala, hippocampus
what are the functions of the midbrain? two colliculi functions?
sensorimotor reflexes superior colliculi - visual reflexes inferior colliculi - auditory reflexes
what are the functions of the hindbrain (pons, medulla, cerebellum, reticular formation)
pons - sensory pathway medulla - (vital functioning) breathing, heart rate and blood pressure cerebellum - posture/balance/ coordination reticular formation - arousal and alertness
-encephalons of the forebrain (outer/basal+thalamus+hypothalamus) -encephalon of the hindbrain (pons+cerebellum/medulla)
outer - telencephalon inner - diencephalon pons - metencephalon medulla - myelencephalon
if lateral hypothalamus is damaged, a person will _____ if anterior hypothalamus is stimulated, a person will _________ if ventromedial hypothalamus is damaged, a person will _______
LH - lack eating (stop eating) VM - very hungry (never stop eating) AH - intense sexual behavior
what is the pineal gland for
biological rhythm like circadian
where is Brocas area located? Wenickes? what is the difference between these two?
brocas - frontal - speech formation wernickes - temporal - language comprehension
what is concordance rates?
likelihood twins will exhibit the same trait
during embryonic neurulation, neural groove is formed from what? and neural plates will fuse together to form neural tube what does the neural crest do? - what is the difference between alar and basal plates?
ECTOderm migrates to become different tissue alar- sensory neurons basal - motor neurons
moro and babinski reflexes?
moro - infant puts arms up and then slowly moves down and cries babinski - spreads toes when sole of foot is stimulated
what do ___________ respond to? photoreceptors? hair cells? nociceptors? thermoreceptors? osmoreceptors? olfactory receptors? taste receptors?
electromagnetic waves in visible spectrum respond to movement of fluid in inner ear structures painful/noxious stimuli temperature changes osmolarity of the blood volatile compounds (smell) dissolved compounds (taste)
what is webers law of perception?
there is a constant ratio between the change in stimulus magnitude needed to produce jnd and the magnitude of the original stimuli - for example, we can hear the difference between 440 Hz and 443 Hz - Webers percentage would be 3/440 = 0.68% - if we wanted to know the jnd at 1000 Hz, you would just multiple 1000 Hz by 0.68% o jnd = over 1006.68 Hz
what is signal detection theory ?
changes in perception of the same stimuli depending on internal and external context
cornea
light enters this domelike window in the front of the eye - gathers and focuses the light
anterior chamber
behind the cornea and in front of the iris
iris – what is it and what are the muscles of it?
colored part, comprised of two muscles 1. dilator pupillae – sympathetic 2. constrictor pupillae – parasympathetic - iris is continuous with both choroid and ciliary body
ciliary body function?
produces aqueous humor
ciliary muscles function?
under parasympathetic control and will pull suspensory ligaments to change the shape of the lens
canal of Schlemm function?
drains aqueous humor
choroidal vessels location?
intermingling of blood vessels between sclera and retina
sclera?
thick structural layer (white of the eye) - does not cover cornea
cones vs rods?
cones – detect color vision and sense fine details o S – blue wavelengths o M – green wavelengths o L – red wavelengths rods – light and dark -all contain single pigment rhodopsin
macula and fovea?
macula - center of the retina, contains the fovea fovea - contains only cones for high visual acuity
as the number of photoreceptors that converge onto ganglion increases, what happens to resolution?
decreases!
what is parallel processing in visual processing?
ability to simultaneously analyze and combine information regarding color, shape, and motion which is then compared to memory to determine what is being viewed - being able to recognize a car from a distance
parvocellular cells vs magnocellular cells in visual parallel processing (feature detection)
parvo (p) - high spatial resolution, low temporal - very detailed at rest magno (m) - low spatial, high temporal - blurry in motion
what are the three small bones of the ossicles of the ear?
stirrup (stapes) - connected to oval window of inner ear anvil (incus) hammer (malleus)
what is the utricle and saccule? what is their function?
vestibulae - detects linear motion so spatial awareness
where are otolith hair cells located and where are ampulla hair cells located?
otolith - vestibulae for linear motion ampulla - semicircular canals for rotational motion
where does sound travel from vestibulocochlear nerve to cortex and what is it modified by?
to the MGN (music) - LGN is site (look) to the temporal lobe auditory cortex - modified by inferior colliculus and superior olive
how is the cochlea organized? how far do high frequency pitches vibrate hair cells down the basilar membrane?
tonotopically - very close to the oval window
order of olfactory transmission signals?
odor molecules are inhaled into nasal passage bind to chemoreceptors on olfactory nerves in olfactory epithelium send signal to olfactory bulbs brain
signal pathway for taste signal?
dissolved compounds bind to chemoreceptors (acid for sour, sodium for salt) on taste buds (papillae) brainstem thalamus higher order
somatosensation: 4 modalities of sensation? 1. Pacinian corpuscles – 2. Meissner corpuscles – 3. Merkel cells – 4. ruffini endings – 5. free nerve endings –
pressure, temperature, vibration, pain pressure and vibration light touch pressure and texture stretch pain and temperature
what is proprioception?
kinesthetic sense - where your body is in space
law of pragnanz ?
perceptual organization will always be as simple, regular, and symmetric as possible 1. law of proximity – elements close to another tend to be perceived as a unit 2. law of similarity – objects that are similar tend to be grouped together 3. law of good continuation – elements that appear to follow in the same pathway tend to be grouped together 4. subjective contours – perceive contours resulting in shapes that are not actually there 5. law of closure – space is enclosed by a contour, it is perceived as a full picture
operant conditioning - define the following negative reinforcement – positive reinforcement – negative punishment – positive punishment – negative reinforcement includes two subdivisions - escape and avoidance learning. define these
negative reinforcement – increase behavior by taking away something unpleasant positive reinforcement – increase behavior by giving something pleasant negative punishment – decrease behavior by taking something away positive punishment – decrease behavior by giving something -escape learning- behavior is to reduce bad stimuli that is already happening -avoidance learning – behavior to reduce the probability of something bad happening in the future
psychosexual development (Sigmund freud)
- identity and sexuality linked - each stage, tries to mitigate libidinal tension - unresolved conflict: fixation anxiety neurosis (mental disorder)
5 stages of psychosexual development
5 stages 1. oral stage (0-1) - libidinal energy focused on mouth - if fixation is not resolved at this stage, high levels of dependency may emerge later in life 2. anal stage (1-3) - focused on anus (release of tension by eliminating fecal waste) - if fixation not resolved o child becomes orderly or sloppy 3. Phallic stage (3-5) - males o Oedipus complex: jealousy (fathers relationship with mother) o will relate to father, develop sexual identity, internalize moral code, pick up hobbies - females o electra complex: similar to Oedipus 4. latency (5-puberty) - nothing really happens 5. genital stage (puberty- adulthood) - if all other stages were developed normally, normal heterosexual relationships occur - if not, other adult relationships would occur stages: orangutans always play with little gorillas
Psychosocial theory (Erik Erikson)
- social needs and social demands or pressure - emotional development and role of social environment - previous conflict does NOT have to be resolved before moving on to the next - resolution of conflict can be positive or negative, depending on skills/traits an individual gains from that stage and carries on to the next stage
Moral thinking (Lawrence Kohlberg) 3 phases - how many stages?
6 1. pre-conventional (focus on consequence) – pre-adolescent stage 1 – avoids punishment, “he could get arrested” stage 2 – desire to gain rewards, “he could live long time with wife” 2. conventional (focus on relationships with others) – adolescent stage 3 – obedience to social norms, “its not okay to steal” stage 4 – maintenance of social order, “if he broke the rules, everyone might too” 3. post-conventional (high level of reasoning) – adulthood stage 5 – focus on individual rights, “the druggist should not overcharge” stage 6 – considers abstract/universal ethical principles, “human life has infinite worth”
Cultural and Biosocial Development (Lev Vygotsky) zone of proximal development
a skill that is between what the child can do alone and what the child can do with adult guidance (knowledgable other)
reinforcement schedules for learning. 4 different ones, what are they?
- fixed-ratio (FR) – reinforces behavior after a specific number of performances of that behavior o rat being rewarded with pellet every third time it does behavior - continuous reinforcement is a fixed-ratio schedule in which behavior is rewarded every time is performed 2. variable-ratio (VR) – reinforces behavior after a varying number of performances, but such that the average number of performances to receive reward is relatively constant 3. fixed interval (FI) – reinforces behavior after a specified time period has elapsed o rat getting pellet after pushing level the first time, but must wait 60 seconds until it can get another pellet 4. variable interval (VI) – reinforces behavior the first time a behavior is performed after varying interval of time (changes between 60, 90, 3 min for example)
which reinforcement schedule generates the greatest response?
variable ratio
latent learning
– learning that occurs without a reward but that is spontaneously demonstrated once a reward is introduced
mirror neurons - where are they located and what do they do?
located in parietal and frontal lobes of cerebral cortex - fires when they perform an action or when they see someone else perform that action
what is explicit memory and what two subdivisions does it contain?
(declarative) memory – memories that require conscious recall - includes semantic memory (the facts we know) and episodic memory (our experiences)
what is semantic memory and what is episodic memory?
semantic - facts we know episodic - emotional/experiences
serial position effect for recall … what will the individual remember most and what is this called?
retrieval cue that appears while learning lists primacy - remembering the first recency - remembering the last items
what is korsakoffs syndrome?
form of memory loss that includes both retrograde (loss of previously formed memories) and anterograde amnesia (inability to form new memories) -formation of vivid memories to fill in the gaps
interference of recalling memories: two kinds
a retrieval error caused by the existence of other, usually similar, information - proactive interference: old memories interfere with forming new memories - retroactive interference: new memories interfere with old memories
source-monitoring error
confusion between semantic and episodic memory - a person remembers a the details of an event, but confuses the context under which those details were gained