Behavioural Science Flashcards
Sensory Neurons (known as and purpose)
afferent neurons, transmit sensory information from receptors to the spinal cord and brain
Motor Neurons (known as and purpose)
efferent neurons, transmit motor information from the brain and spinal cord to muscles and glands
Interneurons
found between other neurons and are the most numerous, located predominantly in the brain and spinal cord and are often linked to reflexive behaviour
Reflex Arcs
type of Neural circuits that control this type of behaviour (reflective)
Autonomic system branches
Sympathetic and Parasympathetic
Parasympathetic
rest and digest
Sympathetic
fight or flight
Parasympathetic system
- pupils
- saliva
- bronchi
- heartbeat
- peristalsis
- secretion
- bile
- bladder
- constricts pupils
- stimulates saliva
- constricts bronchi
- decreases heartbeat
- stimulates peristalsis
- increases secretion
- increases bile
- constricts bladder
Sympathetic system
- pupils
- saliva
- bronchi
- heartbeat
- peristalsis
- secretion
- bile
- bladder
- orgasm
- glucose production and release
- adrenaline and noradrenaline
- piloerection or sweating
- dilates pupils
- inhibits saliva
- dilates bronchi
- increases heartbeat
- inhibits peristalsis
- inhibits secretion
- decreases bile
- inhibits bladder contraction
- stimulates orgasm
- stimulates glucose production and release
- stimulates adrenaline and noradrenaline
- increases piloerection or sweating
What does the hindbrain contain
the cerebellum, medulla oblongata, and reticular formation
What does the midbrain contain
the inferior and superior colliculi
What does the forebrain contain
the thalamus, hypothalamus, basal ganglia, limbic system, and cerebral cortex
Thalamus
Relay station for sensory information
Hypothalamus
maintains homeostasis and integrates with the endocrine system through the hypophyseal portal system that connects it to the anterior pituitary
hypophyseal portal system
connects the hypothalamus to the anterior pituitary
Basal ganglia
smoothens movements and helps maintain postural stability
Limbic system
controls emotion and memory
Parts of the limbic system
septal nuclei
amygdala
hippocampus
fornix
septal nuclei
pleasure
amygdala
fear and aggression
hippocampus
memory
fornix
communication within the limbic system
cerebal cortex four lobes
frontal, parietal, temporal, occipital
frontal lobe function
executive function, long-term planning, motor functions (primary motor cortex), impulse control
parietal lobe function
orientation, spatial awareness, somatosensory, manipulation
temporal lobe function
emotion, speech perception, sound processing
occipital lobe function
vision processing
somatosensory cortex senses (4)
touch, pressure, temperature, and pain
Acetylcholine behaviour
the parasympathetic nervous system, voluntary muscle control, attention, alertness
Epinephrine and Norepinephrine
Fight or flight responses, wakefulness, alertness
Dopamine
Smooth movements, postural stability
Serotonin
Mood, sleep, eating, dreaming
GABA, Glycine
Brain “stabilization”
Glutamate
Brain “excitation”
Endorphins
Natural painkillers
nature
genetics
nurture
environment
Sensation
physical stimuli into neurological signals
perception
processing of sensory information to make sense of its significance
sensory receptors
respond to stimuli and trigger electrical signals
sensory neurons
transmit information from sensory receptors to the CNS
projection areas in the brain
further analyze the sensory input
Threshold
the minimum stimulus that causes a change in signal transduction
Weber’s Law
states the just-noticeable difference for a stimulus is proportional to the magnitude of the stimulus, and this proportion is constant over most of the range of possible stimuli
Signal Detection Theory
studies the effects of nonsensory factors, such as experiences, motives, and expectations, on the perception of stimuli
Response Bias
examined using signal detection experiments with four possible outcomes: hits, misses, false alarms, and correct negatives
Adaptation
a decrease in response to a stimulus
Eye
organ specialized to detect light in the form of photons
Visual pathway
retina–> optic nerve –> optic chiasm –> optic tracts –> lateral geniculate nucleus –> visual radiations –> visual cortex
Ear
transduces sound waves into electrical signals that can be interpreted by the brain
Cochlea
detects sound
Utricle and Saccule
detect linear acceleration
Semicircular canals
detect rotational acceleration
Auditory Pathway
cochlea–> vestibulocochlear nerve –> medial geniculate nucleus –> auditory cortex
Smell
detection of volatile or aerosolized chemicals
smell receptors
olfactory chemoreceptors
Taste
detection of dissolved compounds by taste bud in papillae
Somatosensation
four touch modalities
- temperature, pain, touch, pressure
kinesthetic sense
proprioception
ability to tell where one’s body is in space
Bottom-up processing
data driven
recognition of objects by parallel processing and feature detection
slower but less prone to mistakes
Top-down processing
conceptually driven
recognition of an object by memories and expectations, with little attention to detail
Faster, but more prone to mistakes
Gestalt principles
ways that the brain can infer missing parts of an image when it is incomplete
the process of becoming used to a stimulus
Habituation
occurs when a second stimulus intervenes
Dishabitutation
the acquisition of behaviour by watching others
Observational learning
pairing together stimuli and responses, or behaviours and consequences
Associative learning
Classical conditioning
form of associative learning in which a neutral stimulus becomes associated with an unconditioned stimulus
Operant conditioning
form of associative learning in which the frequency of behavior is modified by reinforcement and punishment
Increase frequency of behaviour
reinforcement
Decrease frequency of behaviour
punishment
Stimulus Added, Behavior continues
Positive reinforcement
Stimulus Removed, Behavior continues
Negative reinforcement
Stimulus Added, Behavior Stops
Positive punishment
Stimulus Removed, Behavior Stops
Negative punishment
Awake EEG waves
beta and alpha
Stage 1 EEG waves
Theta (mid frequency mid amplitude)
Stage 2 EEG waves
Theta (mid frequency mid amplitude)
Stage 3/4 EEG waves
Delta (Low frequency, high amplitude)
REM EEG waves
mostly beta (high frequency, low amplitude)
Awake features
able to perceive, process, access, and express information
Stage 1 features
Light sleep
Stage 2 features
sleep spindles and K complexes
Stage 3/4 features
slow-wave sleep; dreams; declarative memory consolidation; some sleep disorders
REM features
appears awake physiologically; dreams; paralyzes; procedural memory consolidation; some sleep disorders
dyssomnias
amount or timing of sleep
parasomnias
odd behavior during sleep
somnabulism
sleep walking
insomnia
sleep disorder in which you have trouble falling and/or staying asleep
narcolepsy
chronic neurological disorder that affects the brain’s ability to control sleep-wake cycles
sleep apnea
breathing repeatedly stops and starts during sleep
Drug addiction occurs in what pathway? which neurotransmitter?
Mesolimbic system… dopamine
Depressants Function
sense of relaxation and reduced anxiety
Stimulants Function
increased arousal
Opiate/opioids Function
decreased reaction to pain; euphoria
Hallucinogens
Distortion of reality and fantasy; introspection
3 human memory types
sensory memory, short term memory, long term memory
sensory memory time
<1 sec
short term memory
<1min
long term memory
lifetime
short term memory can turn into
working memory
2 long-term memory types
explicit and implicit
Explicit memory
conscious