Exams Flashcards
The human nervous system
- consists of the central nervous system and peripheral nervous system working together to monitor and control what we do
- consisting of billions of neurons
- uses electrical and chemical means to send messages
The role of the nervous system
- receives sensory information
- process information
- transmit messages around the body
- react to stimuli
CNS
central nervous system
- consists of brain and spinal cord
Spinal cord
- delicate cable of nerve fibres (brain to lower back)
- major thoroughfare for messages between the brain and rest of body
- efferent (motor) and afferent (sensory) neurons
- 31 segments/12 pairs of cranial nerves
- sensory neutrons leading into dorsal (back) side, motor nerves exiting from ventral (abdominal) side
Efferent neurons
motor
- transmit information via impulses away from the brain
Afferent neurons
sensory
- transmit information via impulses towards the brain
PNS
peripheral nervous system
- consists of all never outside the CNS
- carry sensory info from the body to CNS back to body e.g. temperature
Sympathetic Nervous System
- emergency/arousal system
- during times of stress/threat
- increase activity level of some body system
- adrenaline/noradrenaline released
Adrenaline/noradrenaline
- increase heat rate
- increase blood pressure
- increase energy and breathing rate
Parasympathetic Nervous System
- reverses effect of the sympathetic nervous system
- return body to normal/conserve energy
- keeps the body in a state of wellbeing or homeostasis
Neurons
- specialized nerve cell that receives, processes, and transmits information to other cells in the body
- connects enable messages to be transmitted from one neuron to another
Cell body
- contains the nucleus that controls the maintenance and metabolic functions of the cell
dendrites
- fine branches from the cell body that receive’s messages
axon
- transmits info from one neuron to another or cells in muscles or glands
myelin sheath
- protects the axon and assists with transmission of the nerve impulse
nucleus
- power house
Somatic nervous system
- monitors bodily functions
- receives sensory information from organs such as skin, ears, eyes
- carries messages from CNS to muscles
- helps to understand what is going on in the environment
Autonomic nervous system
- neurons sending messengers from brain to involuntary (smooth) muscles
- regulates involuntary functions
The parts of the brain
- forebrain
- cerebellum
- brainstem
the forebrain
- upper most part of brain consistent of the cerebrum and limbic system and thalamus and hypothalamus
- outer brain areas are involved in perception, learning, emotions
- centre brain e.g. temp, reproduction, eating, sleeping, emotions
- how we think, feel, behave
- outer layer (cerebral cortex)
the cerebrum (cerebral cortex)
- controls motor and mental activity
- divided into left and right
left hemisphere of cerebrum
- analytical thinking, logic, language, reasoning, math, writing, numbers, right hand
right hemisphere of cerebrum
- art, awareness, creativity, imagination, intuition, music, 3D forms, left hand
the cerebellum
- lies below cerebrum
- responsible for motor control and balance
- coordinated movements (precise)
- movements smooth rather than jerky
the brainstem
- connects brain to spinal cord
- relays messages
- important in vision and hearing
- functions; breathing, sleep patterns, hunger, thirst, blood pressure, heart rhythms, body temp
parts of the brainstem
- midbrain
- the pons
- the reticular system
- medulla oblongata
cranial nerves
- carry sensory input from the skin or motor output to the muscles of the head/face
lobes of the brain
- frontal
- parietal
- occipital
- temporal
frontal lobe
- associated with thinking, decision making, feeling and behaviour
- determines behavioural responses
- coordinates with functions of other lobes
primary motor cortex
- located at the back of the frontal lobe
- generates neural impulses that pass down the spinal cord to control movement
Broca’s area
- usually in left frontal lobe
- used in production of speech
- damage to this area can result in language loss (Brocas Aphasia)
Parietal lobe
- behind frontal lobe
- responsible for body sensations (mainly touch, pain and temp)
- spacial awareness, aspect and speech, enables us to read, write and solve problems
damage to the parietal lobe
- left; problems in math, reading and writing and neglect to right side of the body
- right; loss of imagery, visualisation and neglect to left side of the body
occipital lobe
- behind and below parietal lobe
- responsible for visual functions of the eyes
- consists of primary visual cortex which receives visual input from the retina
- involved in both visual perception and colour regulation
ARRRRRIIIIIICCCIIIIAAA
You smell
temporal lobe
- important in auditory perception (hearing), speech production, and memory
- receives information from ears and interprets different sounds
- contains; limbic system, amygdala, hippocampus, wernicks area
temporal lobe
- important in auditory perception (hearing), speech production, and memory
- receives information from ears and interprets different sounds
- contains; limbic system, amygdala, hippocampus, wernicks area
Wernicks area
- links to brocas
- describes a condition in which language comprehension is impaired, while speech production remains normal (wernick’s aphasia)
- receptive language is impaired
dopamine
- learning, attention, pleasurable sensations
seretonin
- sleep, mood
- less serotonin can be linked to depression
noradrenaline
- helps the body to deal with danger/threat/stress
endorphins
- allow perception of pain
- released when you experience a positive mood
multipolar neuron
- many dendrites
- one axon
- motor and interconnected (carries sensory and motor info) neurons
bipolar neuron
- one dendrite
- one axon attached to cell body
- only found in eye and ear
hormone
- a protein, amine or steroid molecule that acts as a chemical messenger to act upon target cells
- they are secreted from endocrine glands into the bloodstream where they are carried to target cell/organ
hormone
- a protein, amine or steroid molecule that acts as a chemical messenger to act upon target cells
- they are secreted from endocrine glands into the bloodstream where they are carried to target cell/organ
endocrine system
- hormones are released by endocrine gland throughout the body and travel through the bloodstream
- hormonal responses are slower than nervous responses
- hormones communicate with the body by heading towards their target cell to bring about a particular change/effect to cell
adrenaline
- gland; ADRENAL GLAND
- responsible for fight/flight
- increases heart rate, blood pressure
- expands air passages of lungs
- enlarges pupils
- alters metabolism
thyroxine
- gland; THYROID
- effects bones, reproductive, digestive, cardiovascular systems, energy production, basal metabolism rate (BMR), mental alertness
- BASICALLY THE BODIES METABOLISM
BMR (basal metabolism rate)
- the sum of all the bodies reactions at rest
- measure of hoe much energy the body uses at rest
Growth
- gland; pituitary
- growth and development
- secreted mostly during sleep
Testosterone
- gland; tests
- sperm production
- stimulates secondary sexual characteristics in males
Progesterone
- gland; ovaries/placenta
- maintain endometrium (prevents from breaking down)
heredity
- the passing on of physical and/or mental characteristics genetically from one generation to another
heredity
- the passing on of physical and/or mental characteristics genetically from one generation to another
biological influence
- conception - meeting of sperm and egg
- forms zygote (side goat) - contains all DNA required for a new individual (male - XY, female - XX)
- DNA (double helix), chromosomes (coiled up DNA, contains genes)
- cell devision - zygote goes through cell devision known as mitosis
- mitosis - interphase, prophase, metaphase, anaphase, telophase
- development - genes code for characteristics the individual will now ace - critical for the embryo - abnormalities may occur
- hormones - endocrine system, control growth, development, sexual characteristics
stimulant
- increase heart rate
- decrease appetite (due to blood sugar rising)
- gives energy and confidence boost (YAS WORK IT GURL)
- people use stimulant to stay awake (like studying all night for this psychology exam), lose weight, boost athletic performance
- after effect can include headaches, tiredness and irritability
- highly addictive
hallucinogens
- mind-altering drug
- change perception and can result in vivid images
- can be natural in origin such as marijuana (devil’s lettuce) and mushrooms
- some are synthetically produced such as LSD
LSD
- associated with 1960s-1970s
- ‘trip’ can range from one of euphoria to one of terror and panic
- users mood and expectations affects trip
Ecstacy
E-e-e-ecstacy (by Mr. G)
- club drug
- stimulant and mild hallucinogen
- creates heightened emotion and a feeling of connectedness with those around them
- effects; dehydration, overheating, increase in blood pressure
- death can occur if overdose and dehydration occurs
LONG TERM EFFECTS: brain serotonin, permanently deflated mood, memory loss, damage to immune system
Ecstacy
E-e-e-ecstacy (by Mr. G)
- club drug
- stimulant and mild hallucinogen
- creates heightened emotion and a feeling of connectedness with those around them
- effects; dehydration, overheating, increase in blood pressure
- death can occur if overdose and dehydration occurs
LONG TERM EFFECTS: brain serotonin, permanently deflated mood, memory loss, damage to immune system
alcohol effect of brain
- forebrain; assaults motor coordination and decision making
- midbrain; lose control over emotion and increase chance of blackout
- brainstem; affect heart rate, body temp, appetite and consciousness
alcohol effect of brain
- forebrain; assaults motor coordination and decision making
- midbrain; lose control over emotion and increase chance of blackout
- brainstem; affect heart rate, body temp, appetite and consciousness
nature vs nurture
- heredity (nature)
- environment (nurture)
- genetic component fixed at birth
- environment supports, encourages and teaches children to reach their potential
- twin studies, adoption studies
factors effecting behaviour, emotion, thought
physical activity
- numerous studies show that a moderate amount of exercise has benefits for our physical health, halving risks of heart attacks and adding 2 year to life expectancy
- study in Canada showed that 1 out of 4 Canadians who exercised regularly reported feeling more energetic, less depressed and tired less often
neurotransmitters
- are a chemical that affect the way messaged are passed from one neuron to another
- carry a message from sending neuron to synapse to a receptor site on receiving neuron
neurotransmitters
- are a chemical that affect the way messaged are passed from one neuron to another
- carry a message from sending neuron to synapse to a receptor site on receiving neuron
controlled variable
- variable that is not changed throughout experiment
- kept same so the changes observed are the results of the IV
e. g. testing reaction times, the size of computer screen would be kept the same
uncontrolled variable
- variable allowed to stay random because it is predicted to have no effect on the outcome of an experiment
e. g. persons eye colour
experimental group
- subject to IV
control group
- not subject to IV
- provides standard against which the behaviour of the experimental group can be compared to see if the IV has had an effect
groups in experiments need to be
- as similar as possible
- tested the same
ethics/participants rights
- ensure that no psychological or physical harm is caused to the research participants and the researcher must also respect the participants rights as an individual
confidentiality
- participants have a right to privacy
- all details of their involvement in the study cannot be revealed in a way that the participant can be identified
voluntary participation
- involvement must be voluntary
- no pressure to take part in the study
informed consent
- participants much informed of the nature and purpose of the investigation
- consent must be documented and consent form signed by participant (or guardian for those under 18)
withdrawal rights
- participant has ability to withdraw from the study at any time, without giving a reason and their results cannot be used
debriefing
- opportunity for participants to obtain appropriate information about the nature, results and conclusions of research
- researcher must correct any mistaken attitudes or beliefs that participants may have about the research
debriefing
- opportunity for participants to obtain appropriate information about the nature, results and conclusions of research
- researcher must correct any mistaken attitudes or beliefs that participants may have about the research
beneficence
- benefits bust outweigh the harm
placebo effect
- harmless substance given as if it were a treatment
- pretend IV
- given to controlled group that is blind on its status and think it is receiving the treatment
- used to control the effects of participants expectation
experimenter effect
- when the experimenter’s expectations may be bias and influence the observation, recording or interpretation of data
reliability
- consistent and stable over time
- same results under the same circumstances
validity
- extend to which the results reflect what the measurement instrument says it is measuring
steps in scientific method
- identify a research issue to investigate
- develop the exact research question
- choose a research design and method
- collect date
- examine evidence
- interpret data
- communicate the findings
case study
- direct behavioural observation of a single person
- used in clinical studies, where rare phenomena or unusual behaviour is observer and recored
e. g. piaget daughter under observation in preschool
disadvantages of case study
- long time (costly)
- intrusive
disadvantages of case study
- long time (costly)
- intrusive
survey
- self-reported data from participants who are randomly selected
- form of questionnaire with pre-determined answers
advantages of survey
- allow comparison to be made across groups
- difference across genders, age or location
disadvantages of survey
- not always honest
- no info as to why
- people ignore the explain
correlational studies
- find out if there is a relationship between variables and how strong it is
advantages of correlational studies
- rise alternative hypothesis that can be rested
archival research
- studying of existing data
- use past experiments to compare finding to see if there are any changes
- can be extended if they get in contact with original participants
advantages of archival research
- cheaper than collecting new data
- allow researchers to gather data of long periods of time
- larger scale of sample
disadvantages of archival research
- takes time to locate appropriate data
- obtain permission to use
- involve higher knowledge and skill
classical conditioning
stimulus: - event that causes response response: - an action made because a stimulus is detected innate: instinctive/inborn conditioned: learned
steps of classical conditioning
food (UCS) > dog drools (UCR)
bell (NS) + food (UCS) > drools (UCR)
bell (CS) > dog drools (CR)
UCR
unconditioned response
UCS
unconditioned stimulus
NS
neutral stimulus
CS
controlled stimulus
CR
controlled response
positive reinforcement
- a consequence that causes a behaviour to occur more frequently
positive reinforcement
-
positive punishment
- aversive (undesirable) consequence of behaviour that causes it to occur less frequently
negative reinforcement
- the removal of an unpleasant outcome after a behaviour to because it to occur more frequently
negative punishment
- removal of a pleasant stimulus
token economy
- a system in which a person is given a token in return for desired behaviour which can be exchanged for a reward
social learning theory
- like behaviourist theory their theory believes that human behaviour is created by environment but argues that role model played big role in shaping behaviour
Bandura Experiment
- investigates whether you children observe and imitate role models
- children watched and imitated adults aggressive behaviours
modelling
- a person copies the behaviour of a role model
- also referes to the behaviour being advertised by the role model
vicarious reinforcement
- something that is felt indirection by imaging what another person is feeling or experiencing
- observe someone else being either possibly or negatively reinforced for behaving in a certain way
- makes us want to observe and imitate other behaviour to receive the praise
vicarious reinforcement
- something that is felt indirection by imaging what another person is feeling or experiencing
- observe someone else being either possibly or negatively reinforced for behaving in a certain way
- makes us want to observe and imitate other behaviour to receive the praise
systematic desensitisation
- application of classical condition to fears and phobias on humans
- undertaken by a psychologist who has been consulted when a person realised he or she has a phobia with his or her fear
Walpe (1958)
- aim; therapy aims to extinguish an undesirable behaviour by replacing it with a more desirable one
- systematic desensitisation worked through reciprocal inhibition
- hierarchy of fear is formed - most frightening stimulus at one end and least at the other
hierarchy of fear
e. g. spider
1. think about spider
2. see picture of spider
3. be in same room as spider
4. sit next to glass with lid closed
5. sit next to glass with lid open
6. put hand in tank
7. hold spider in hands
how hierarchy of fear works
- subject made to relax at each stage and moving on once comfortable
findings of systematic desensitisation
- 80-90% of patients are ‘cured’ or much improved after and average of 25-30 sessions
disadvantages of token economy
- maintaining improvement in behaviour once the patient or inmate has left
- need to be respected with other social rewards
disadvantages of token economy
- maintaining improvement in behaviour once the patient or inmate has left
- need to be respected with other social rewards
memory
- the process of maintaining information over time
- most important mental process of humans
- we can draw upon past experience in order to use this information in the present
- IS THE TERM GIVEN TO THE STRUCTURE AND PROCESSES INVOLVED IN THE STORAGE AND SUBSEQUENT RETRIEVAL OF INFORMATION
encoding
- refers to the conversation of sensory information into a form that can be processed by the brain
- when information comes into our memory system (from sensory input), it needs to be changed into a form that the system can cop with
- there are 3 main ways in which information can be stored in
- visual (pictures)
- acoustic (sound)
- semantic (meaning)
encoding
- refers to the conversation of sensory information into a form that can be processed by the brain
- when information comes into our memory system (from sensory input), it needs to be changed into a form that the system can cop with
- there are 3 main ways in which information can be stored in
- visual (pictures)
- acoustic (sound)
- semantic (meaning)
storage
- refers to the retention of information. Information must be stored in a form that is accessible later
- concerns nature of memory
- Eg where, how long
retrieval
- is the recovery of information stored in the brain
- if the memory cannot be retrieved then can’t be proven to exist
- humans form associations between neutral networks to aid in retrieval (cue/prompt)
forms of memory
- sensory memory
- short-term memory
- long-term memory
sensory memory
- it is the ability to retain impressions of sensory information as a kind of buffer for stimuli received through the 5 sense
- 30 secs