Behavioural Sciences Flashcards
hindbrain
- cerebellum = blanace/refined motor
- medulla oblongata = vitals
- reticular formation = alertness/arousal
midbrain
sensory/motor info from body
REFLEXES
forebrain
NOT needed for survival, complex processes
cortex, basal ganglia, limbic, thalamus, hypothalamus, posterior pituitary, pineal
thalamus
sensory waystation (NOT smell)
MGN = auditory info
LGN = visual infor
hypothalamus
homeostasis
* LH = triggers eating (damage = lack hunger)
* VMH = triggers satiety (damage = very much hungry)
* AH = sexual, sleep, body temp
posterior pituitary
oxytocin + ADH from hypothalamus
pineal gland
melatonin – biological rhythms
basal ganglia
smooth movement + posture
limbic system
- amygdala = aggression/defensive, processes environment, external cues, learns from surroundings
- hippocampus = long term mems, learning/memory
- hypothalamus = homeostasis
- thalamus = relays sensory info (EXCEPT SMELL)
- septal nuclei = pleasure centre
cortex
- frontal = prefrontal cortex (superivse), motor cortex (precentral gyrus), Broca’s area
- parietal = somatosensory cortex, integrate sensory information
- occipital = vision
- temporal = auditory, Wenicke, hippocampus
dominant hemisphere
- usually LEFT
- letters, words, speech, reading, math, language sounds, complex voluntary movement
non-dominant hemisphere
faces, music, emotions, geometry, direction
dopamine
role in movement/posture
HIGH in Schizophrenia
LOW in Parkinsons
serotonin
mood, sleeping, eating, dreaming
GABA
- inhibitory, hyperpolarization of post synaptic membrane, Cl- channel causing hyperpolarization
- reduces neuronal excitability
- LOW LEVELS in patients with anxiety
- does NOT really relate to MOOD disorders
glycine NT
inhibitory
hyperpolarization of postsynaptic membrane (same as GABA)
glutamate NT
excitatory NT
peptide NT
endorphins, natural painkillers
sensation VS transduction VS perception
sensation = receptors in PNS detect stimulus
transduction = convert physical stimuli to electrical signals in NS
perception = processing of this info to understand it
sensory receptors
- photoreceptors =EM waves
- hair cells = hearing, rot/lin acceleration
- nociceptors = pain
- thermoreceptors
- osmoreceptors
- olfactory receptors
- taste receptors
absolute threshold
minimum stimulus to activate SENSORY system
threshold of conscious perception
below this, stimulus arrives at CNS but is not perceived by higher brain structures
JND threshold
minimum difference between 2 stimuli to percieve difference
Weber’s Law
(discriminatory change/original value) x 100%
* constant ratio of discrimination – higher magnitude stimulus needs higher magnitute change to percieve difference
* LINEAR RELATIONSHIP
signal detection theory
change in our percpetion of stimuli based on context, how perception is influenced by memories/expectation
sclera
white of eye, not over front most cornea
retina
innermost layer, has photoreceptors (considered CNS)
cones = colour (bright light)
rids = light/dark (dark light)
fovea
middle of retina = macula
centremost region is fovea = ONLY CONES
as move away to edges, cones decrease and rods increase
resolution of photoreceptors
as # of receptors that converse through bipolar neurons increase, the resolution DECREASES
cones have HIGH resolution, so LESS converging at one ganglia
parallel processing
simultaneously analyze/combine colour, shape, motion
* colour = cone cells
* shape = parvocellular cells (HIGH spatial resolution, LOW temporal)
* motion = magnocellular cells (LOW spatial, HIGH temporal) blurry but moving
place theory
location of hair cell that gets vibrated on basilar membrane determines perception of PITCH
base (close) = HIGH frequencies, apex (end) LOW frequencies
vestibule
utricel & saccule
LINEAR acceleration, used in balance
semicircular canals
ROTATIONAL acceleration
pacinican corpuscles
deep pressure/vibration
meissner corpuscles
light touch
merkel discs
deep pressure/texture
ruffini endings
stretch
free nerve endings
pain + temperature
2 point threshold
minimum distance between 2 points of stimulation to feel as DISTINCT
depends on density of nerves
gate theory of pain
gate mechanism can turn pain on/off by spinal cord preferentially forwarding other sensory signals to the brain to lower pain perception
proprioception
kinesthetic sense, where body is in space
receptors found in muscle/joints
hand eye cord, balance, mobility
bottom up processing
slower, first time, parallel processing, combine stimuli to create image before determining what the object is
top down processing
faster, memories/expectations, quick recognition of object as a whole before recognizing components
gesalt principles
** law of pragnaz = perceptual organization always as simple, regular, symmetrical as possible**
* proximity = objects close together percieved as unit
* similarity = similar objects grouped together
* good continuation = elements seem to follow same pathway/pattern groped together, most simple pattern
* subjective contours = perciving shapes not present due to contours
* closure = percieve as complete figure even if not fully closed
PGSSC
classical conditioning
- involuntary behaviours instinctual reponse
- associate 2 unrelated stimuli\
- generalization = similar stimuli produce response
- discrimination = distinguish between 2 similar stimuli
operant conditioning
- VOLUNTARY behaviours with consequences
- escape learning = do something to reduce negative effect
- avoidance learning = do something to prevent negative effect
reinforcement schedules
- FR = after fixed # performances (2nd best)
- VR = after varying # performances (BEST – very rapid / very resistant)
- FI = after fixed interval of time, WORST
- VI = after varying intervals of time, 3rd best
**RATIO > INTERVAL, VARIABLE > FIXED
sensory memory
very short
maintained by snesory projection areas
fades quickly
short-term memory
hippocampus, 7 +/- 2 items in STM
can use rehearasal techniques to learn + move to LTM
working memory
allows up to manipulate few pieces of info
eg. simple math in heads
long term memory
BEST = elaborative rehearsal
hippocampus consolidates STM -> LTM
implicit and explicit memory
implicit memory
skills, conditioned responses, procedures
eg. tying shoe, riding a bike
explicit memory
- semantic memory = FACTS, concepts, ideas
- episodic memory = semantic memories in a specific context, our EXPERIENCES, emotional association
alzheimer’s
- retrograde memory loss
- APP mifolds ,form plaques from B-sheet insoluble
korsakoff’s syndrome
memoryloss due to thiamine deficiency + alcoholism
both retrograde and anterograde amnesia
confabulation
confabulation
false memory creation
long term potentiation
as simulus, repeated, neurons increase efficiency of releasing NTs, receptor sites on postsynaptic membrane increase, basis for LTM
proactive VS retroactive interference
- proactive = old information impairs ability to learn NEW
- retroactive = new information causes forgetting of OLD
piaget’s stages
1. sensorimotor (0-2) = 1/2 circular reactions, ENDS with object permanence
2. preoperational (2-7) = symbolic, centration, egocentrism, pretend play
3. concrete operational (7-11) = CONSERVATION, learn empathy and math skills
4. formal operational (11+) = abstract thinking, moral reasoning
vygotsky
culture influences development, scaffolding
zone of proximal development = space between what child can do on their own and what they can do with help
fluid vs crystallized intelligence
fluid intelligence = problem solving skills
crystaqllized intelligence = learned skills / knowledge
IQ
mental age / chronological age x 100
states of consciousness – “BATD”
- awake = beta waves, reticular formation (disrupted = coma)
- relaxed = alpha waves, slower, eyes closed
- Stage 1 = theta waves (irregular, slow)
- Stage 2 = sleep spindles, K complexes
- Stage 3+4 = delta waves (SWS), low freq high V
- REM intersperced between stages of sleep
One sleep cycle = 90 minutes, REM between
REM
- patterns mimic wakefulness (beta) but person is asleep
- memory consolidation, dreams
- most REM is at the END of the night
circadian rhythms
- low light = releases melatonin from pineal gland, controlled by hypothalamus connected to retina, makes you sleepy
- high light = CRF increases, stimulaties ACTH, cortex releases cortisol to keep you awake
dreaming theories
- activation synthesis = desires, needs, memories
- problem solving = use dreams to solve stuff
- cognitive process theory = dreams are stream of consciousness
dyssomnias
difficult to FALL, STAY, AVOID, sleep
insomnia, narcolepsy, sleep apnea
parasomnia
abnormal behaviour while sleeping
night terrors, sleepwalking
depressants
- REDUCE NS activity
- alcohol = increases GABA, brain inhibition, alcohol myopia
- benzos/barbituates = increase GABA, relaxation
stimulants
- increase frequency of action potentials
- amphetamines = increase dopamine/E/NE/serotonin, decrease reuptake
- cocaine = anesthetic + vasoconstrictive
- ecstasy
- opiates (morphine, codeine)
- opioids (oxycodone, hydrocodone, heroin)
marijuana
stimulant, depressant, and hallucinogen
INHIBITS GABA
also increase dopamine, serotonin, NE
mesolimbic reward pathway
- responsible for drug addiction
- pathway connecting the midbrain to the forebrain
- releases dopamine, reinforcing behaviours that are percieved as pleasurable
- dopamine = reinforces drug use
nativisty theory of language
innate capacity for language (LAD)
critical period for development = 2-puberty
learning theory of language
skinner, learn by operant conditioning, reinforcement by parents
social interactionist theory of language
interaction of biological and social processes
language driven by desire to communicate
wharfian hypothesis
language determines perception of reality
arcuate fasciculus
connects Broca + Wernicke
damage = conduction aphasia
speech + comprehension unaffected, but cannot repeat what’s been said
opponent process theory
when drug is taken repeatedly, body changes physiology to oppose drug’s effects
explains WITHDRAWL
3 elements of emotion
- physiological response
- behavioural response (facial + body lang)
- cognitive response (subjective interpretation of feeling)
common sense theory of emotion
stimulus – feel emotion – physiologic response
my heart is pounding because i am afraid
james-lange theory of emotion
stimulus – physiologic response – feel emotion
i am afraid because my heart is pounding
cannon-bard theory of emotion
stimulus – physiologic response & feel emotion
my heart is pounding and the wolf makes me afraid
* Cannon hypothesized the thalamus sent sensory info simultaneously to BOTH sympathetic NS and the cortex
* critique = fails to account for VAGUS nerve – feedback system sends info from periopheral organs to CNS, peripheral organs can still relay info to the brain even when afferent nerves severed
sachter-singer theory of emotion
stimulus – physiologic response &same time cognitive appraisal – feel emotion
my heart is pounding means i am afraid because i have interpreted the situation as dangerous
physiologic arousal and interpretation occur simultaneously, then leading to emotion
limbic system components list
amygdala, thalamus, hypothalamus, hippocampus, prefrontal cortex
amygdala
- fear, process environment, interpret facial expressions
- controls IMPLICIT memory
- aggressive behaviour
hippocampus
temporal lobe, controls EXPLICIT memory, creating LTM’s
storage + retrieval of emotional memories
prefrontal cotrex
- complex planning, decisions, personality
- dorsal = attention + cognition
- ventral = emotion
- venteromedial = controlling emotional responses from AMYGDALA
general adaptation syndrome
- alarm = initial reaction, SNS activated, trigger stress hormones
- reistance = continued hormones, SMS fight stressor, resistance to sickness
- exhaustion = body can’t maintain elevated response, sickness
Freud’s identity development
- oral (0-1) = mouth, fixtion = dependency
- anal (1-3), fixation = orderliness/messiness
- phallic (3-5), oepidal/electra conflict resolved, fixation = vanity, envy, self-obsession, sexual dysfunction
- latent (5-puberty) = libido silenced
- genital (puberty-adult) = healthy heterosexual relations
Erikson’s psychosocial development
(my silly girl in red is selling drugs)
trust v. mistrust (0-1)
autonomy v. shame (1-3)
initiative v. guilt (3-6)
industry v. inferiority (6-12)
identity v. role confusion (12-20)
intimacy v. isolation (20-40)
generativity v. stagnation (40-65)
integrity v. despair (65+)
kohlberg’s moral reasoning
- personality depends on development of moral reasoning
- Preconventional – 1. obedience (consequences) 2. self-interest (gain rewards)
- Conventional – 3. conformity (approval of others) 4. law/order (maintain social order)
- Postconventional – 5. social contract (moral rules = greater good) 6. universal human ethics (abstract)
vygotsky personality
driven by child’s internalization of culture, ZOPD
psychoanalytic perspective: personality
- Freud
- Jung
- Adler + Horney
Freud’s psychosexual
- inborn sexual instincts
- id = inborn urges, pleasure principle
- superego = perfectionist, judging, pride/guilt
- ego = oppose id, reality principle, moderates superego/ego
- *eg. id=child, superego=parents, ego = mediator
Jung
- libido in general, not just sexual
- inborn archetypes = Jungian archetypes
- archetypes = underlying forms/concepts, building blocks of common experiences
- ego = conscious mind
- unconscious mind = personal + collective
- SELF is the harmony between conscious, collective unconscious, personal unconscious
- 3 dichotomies of personality, led to Myers-Briggs Type Inventory
Jungian archetypes
- persona = personality we present to the world
- anima = man’s femininity, sex-inappropriate
- animus = woman’s masculinity, sex-inappropriate
- shadow = unpleasant + socially incorrect thoughts/feels
Adler + Horney
- adler = striving for superiority drives personality
- horney = diagree with Freud’s assumption about women – personality is governed by neurotic needs, if become the central focus this leads to neurotic need (ANXIETY)
humanistic perspective of personality
- Rogers Person Centred Theory = help client reflect, make choices, take action, power to control OWN behaviour
- person-centred, value individuals, how HEALTHY people strive to SELF REALIZATION (Maslow)
- Kelly = used himself, individuals = scientists, anxious means having diccifulty understanding environment
type theories
- ancient greek humours
- sheldon’s somatotypes
- type A (high strung), type B (relaxed)
- myers-briggs type inventory
trait theories
- Eysenck PEN model = psychotism (nonconformity), extraversion, neuroticism) – now the big 5 traits
- Allport = 3 types of traits — cardinal (big, organize life around), central (major trait), secondary (personal, limtied)
- McClelland = identified personality trait “N-Ach” = need for achievement
social cognitive theory of personality
reciprocal determinism where people shape environments based on personality, envrionment shapes thoughts/feelings/behaviours
people learn by watching others, especially when others receive rewards/punishments
behaviourist theory of personality
operant conditioning, behaviours one has LEARNED based on reward/punishment make up personality
biological theory of personality
behaviour a result of GENES, make up personality
schizophrenia
- delusions, hallucinations, disorganized thought, disorganized behaviour
- disturbance of AFFECT (emotion) and AVOLITION (ability to do things)
- HIGH dopamine
major depressive disorder
- 1+ depressive episode (5+ symptoms, 2+weeks, impairs functioning)
- sadness + SIG E CAPS
persistent depressive disorder
- suffer from depressed mood NOT severe enough for MDD
- usually 2+ years
SAD
- MDD with seasonal onset in winter
- abnormal melatonin metabolism
bipolar I
- manic episodes
- might have MDE’s
bipolar II
- hypomania (less severe than mania, doesn’t impair functioning)
- at least ONE MDE
cyclothymic disorder
- bipolar disorder
- combination of hypomanic episodes + low mood (NOT MDE)
generalized anxiety disorder
persistent worry about a variety of things
specific phobia
irrational fear of something
social anxiety
anxiety in social situations
agoraphobia
fear of being in places that are hard to escape from
panic disorder
fear, sweating, hyperventilating, sense of unreality
OCD
obsessions (stress-inducing thoughts)
compulsions (repetitive tasks to reduce the stress)
body dysmorphic disorder
- type of OCD related disorder
- unrealistic + negative view of body
PTSD
- intrusion = flashback/nightmare
- avoidance = people, places
- negative cognitie = forget, distanced
- arousal = startle, anxiety, irritability
- must have symptoms for at least one month, if less = acute stress disorder
dissociative disorders
escape one’s reality
dissociative amnesia, identity, derealization
dissociative amnesia
inability to recall past experiences, linked to trauma
dissociative identity disorder
2 or more personalities that take control of person’s behaviour
severe physical/sexual abuse as a child
derealization disorder
detached from mind/body, out of body experiences
doesn’t display psychotic symtpoms (delusion/hallucin.)
somtic symptom and related disorders
- somatic symptom = 1+ somatic symptom with disproportionate anxiety about its seriousness
- illness anxiety = consumed with thoughts of getting ill
- conversion = unexplained symptoms ex. blindness with no neurological impairment
personality disorder:
cluster A (cold/eccentric)
- paranoid = distrust
- schizotypal = odd/magical thinking
- schizoid = detached, low emotion, low social skills
personality disorder:
cluster B (erratic/drama)
- antisocial = no guilt/remorse for actions
- borderline = instability in mood+behaviour
- histrionic = attention seeking behaviour
- narcissistic
personality disorder:
cluster C (anxious/fearful)
- avoidant = shyness
- dependent = continous need
- OCPD = NOT OCD, perfectionist + inflexible, rules)
delusions
false beleifs NOT shared by others in the SAME CULTURE
* delusions of reference, persecution, grandeur
hallucinations
perceptions NOT due to external stimuli
disorganized behaviour
- can’t do activities of daily living
- catatonia = rigid posture/bizarre movement
- echolalia = repeat others words
- echopraxia = imitate actions of others
disorganized thought
speech with no structure, word salad, shifts ideas
disturbance of affect
reduction in ability to display intensity/appropriateness of emotion
avolition
low engagement in purposeful, goal-directed actions
prodromal phase
- BEFORE schizophrenia diagnosis
- clear deterioration, withdrawl, odd behaviour
SSRIs
block reuptake of serotonin by presynaptic neuron, increase serotonin levels
symptoms of depressive episode
- sadness + SIG E CAPS (need 5+ for MDE)
- sleep, interest, guilt, energy, concentration, appetite, psychomotor, suicidal
symptoms of manic episode
- DIG FAST – need 3+!
- Distractible, Insomnia, Grandiosity, Flight of ideas, Agitation, Speech, Thoughtlessness (risk)
ego-syntonic VS ego-dystonic personality disorders
- syntonic = they percieve their behaviour as correct
- dystonic = see the illness as intrusive/bothersome
borderline personality disorder
- cluster B personality disorder
- instability in mood/behaviour/self image
- fear of abandonment
- splitting as strategy – everyone good OR evil
- common in FEMALES
causes of schizophrenia
- hypoxemia at birth
- marijuana
- inherited genetics
- HIGH DOPAMINE – treat with neuroleptics to block receptors (antipsychotics)
causes of alzheimer’s
- presenilin gene (chr. 1 + 14)
- apolipoprotein (chr. 19)
- B-amyloid precursor gene (chr. 21) – HIGH in Down’s Syndrome
- atrophy of brain, flattened sulci, enlarged ventricles, low blood flow in PARIETAL lobe, low Ach, plaques, tau protein tangels
causes of parkinson’s
- LOW dopamine in basal ganglia
- basal ganglia for start/stop motor movements, smoothing movements
- brady kinesia (slow), resting tremor, pill-rolling tremor, masklike fascies (emotionless), muscle tension, shuffling gait
- depression + dementia COMMON
michelangelo phenomenon
ideal self can be SCULPTED with help from others
social action
action/behaviour a person is conscious of and performing becuse others are around
VS social interaction = action/behaviour of 2+ people
Yerkes-Dodson law
- presence of others (arousal) enhances performance of SIMPLE tasks, HINDERS complex tasks
bystander effect
- when people don’t help victims when others are around
- more likely to help if less people, not strangers, high severity, responsibility felt
- can be WORSENED when adding more moderators/securityi
social loafing
put in less effort in a group setting than individually
peer pressure
- social influence, can be + or -
- mechanism = identity shift effect = conform to norms of group