MCAT Quicksheets Behavioral Sciences Flashcards
What are the three types of neurons in the nervous system?
Motor (efferent)
interneurons
sensory (afferent)
What is the parasympathetic branch of the nervous system focused on?
Rest and digest
What is the sympathetic branch of the nervous system focused on?
Fight or flight
What are some of the effects from parasympathetic nervous system activation?
Constriction of pupils Stimulates saliva flow Constricts bronchi Slows heartbeat Stimulates peristalsis and secretion Stimulates bile production Contracts bladder
What are some of the effects from sympathetic nervous system activation?
Dilates pupils inhibits salivation Relaxes bronchi Accelerates heartbeat Piloerection or sweating Inhibits peristalsis Stimulates glucose production and release Secretion of adrenaline and noradrenaline Inhibits bladder contraction Stimulates orgasm
What is the organization of the hindbrain?
Contains the cerebellum, medulla oblongata, and reticular formation
What is the organization of the midbrain?
contains inferior and superior colliculi
What is the organization of the Forebrain?
contains the thalamus, hypothalamus, basal ganglia, limbic system, and cerebral cortex
what is the purpose of the thalamus?
relay station for sensory information
what is the purpose of the the hypothalamus?
maintains homeostasis and integrates with the endocrine system through the hypophyseal portal system that connects the anterior pituitary
what is the purpose of the basal ganglia?
smoothens movements and helps maintain postural stability
what is the purpose of the Limbic system?
controls emotion and memory
includes: Septal nuclei amygdala hippocampus fornix
What do the Septal nuclei do in the Limbic system?
pleasure-seeking
What does the amygdala control?
fear and aggression
What does the hippocampus aid in?
memory
What purpose does the fornix serve in the Limbic system?
Communication within the system
What are the 4 lobes of the cerebral cortex?
Frontal, Parietal, Occipital, and Temporal
What functions does the Frontal lobe serve?
Executive function Impulse Control Long-term planning Motor function Speech production
Long term planning in the frontal lobe occurs in?
the prefrontal cortex
Speech production in the frontal lobe occurs in?
Broca’s Area
What functions does the Parietal lobes serve?
Sensation of touch, pressure, temp, and pain
Spatial processing, orientation, and manipulation
What function does the Occipital lobe serve?
Visual Processing
What function does the temporal lobe serve?
Sound processing, speech perception, memory, and emotion
Sound processing occurs in what area of the temporal lobe?
auditory cortex
Speech perception occurs in what area of the temporal lobe?
Wernicke’s area
What are the 7 main neurotransmitters?
Acetylcholine Epinephrine and norepinephrine Dopamine Serotonin GABA, Glycine Glutamate Endorpins
What is Acetylcholine responsible for?
Voluntary muscle control
Parasympathetic nervous system
attention
alertness
What is Epinephrine and Norepinephrine responsible for?
Fight or Flight respnses
Wakefulness
Alertness
What is serotonin responsible for?
Mood
sleep
eating
dreaming
What is GABA, Glycine responsible for
brain “stablization”
What is glutamate responsible for?
brain “excitation”
What are endorphins responsible for?
natural painkillers
What is sensation?
the conversion of physical stimuli into neurological signals
What is perception?
the processing of sensory information to make sense of it’s significance
What do sensory receptors do?
respond to stimuli and trigger electrical signals
Sensory neurons do what?
transmit information from sensory receptors to the CNS
Where are sensory stimuli transmitted to?
projection areas in the brain which further analyze the sensory input
What is threshold?
the minimum stimulus that causes a change in signal transduction
What is Weber’s law?
states that 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
What is signal detection theory?
studies the effects of nonsensory factors, such as experiences, motives, and expectations on perception of stimuli
Adaptation in regards to behavioral sciences is?
a decrease in response t a stimulus over time
What is the visual pathway of the eye?
retina->optic nerve->optic chiasm->optic tracts->lateral geniculate nucleus of thalamus->visual radiations->visual cortex
Really nice cats that totally remember class.
What does the cochlea do?
detects sound
What does the utricle and saccule do?
detect LINEAR acceleration
What do the semicircular canals do?
detect ROTATIONAL acceleration
What is the auditory pathway?
Cochlea->vestibulocochear nerve->medial geniculate nucleus (MGN) of thalamus->auditory cortex
Could very nice tall cats audit?
Smell is?
detection of volatile or aerosolized chemicals by olfactory chemoreceptors
Taste is?
detection of dissolved compounds by taste buds in papillae
What is somatosensation?
four touch modalities
pressure, vibration, pain, and temperature
What is kinesthetic sense (proprioception)
Ability to tell where one’s body is in space
What is Bottoms up (data driven) processing?
recognition of objects by parallel processing and feature detection.
Slower, but less prone to mistakes
What is Top down (conceptually driven processing)?
recognition of objects by memories and expectations with little attention to detail.
Faster but more prone to mistakes
What are the Gestalt principles?
ways that the brain can infer missing parts of an image when it is incomplete
Habituation is?
the process of becoming used to a stimulus
Dishabituation is?
occurs when a second stimulus intervenes, causing a resensitization to original stimulus
What is observational learning?
the acquisition of behavior by watching others
What is associative learning?
pairing together stimuli and responses, behavior and consequences
What is classical conditioning?
a form of associative learning in which a neutral stimulus becomes associated with an unconditioned stimulus. This stimulus then becomes the conditioned stimulus
*think pavlov
What is operant conditioning?
a form of associate learning in which the frequency pf a bahvior is modifed using reinforcement (increasing behavior) or punishment (decreasing behavior)
What is encoding (in behavioral sciences)?
the process of putting new information to memory
Where are memory facts stored?
via semantic networks
What is retrival of information based on?
Priming
What type of information retrevial is stronger?
Recognition of information is stronger than recall
What are the EEG waves and features of the awake stage of consciousness?
Beta and alpha waves
Able to perceive, process, access, and express information
What are the EEG waves and features of the 1 stage of consciousness?
Theta
Light sleep
What are the EEG waves and features of the 2 stage of consciousness?
Theta
Sleep spindles and K complexes
What are the EEG waves and features of the 3/4 stage of consciousness?
Delta
Slow-wave sleep, dreams, declarative memory, memory consolidation, some sleep disorders
What are the EEG waves and features of the REM stage of consciousness?
Mostly Beta
Appears awake physiologically, dreams, paralyzed, procedural memory consolidation, some sleep disorders
What are dyssomnias?
(amount of time sleeping) Include: insomnia narcolepsy sleep apnea sleep deprivation
What are parasomnias?
(odd behavior during sleep)
night terrors
sleepwalking
What is drug addiction mediated by?
The mesolimbic system
what is the main neurotransmitter involved in drug addiction?
dopamine
Examples of depressants are?
alcohol, barbituates and benzodiazopines
What are the functions of depressants?
sense of relaxation and reduced anxiety
What are some examples of stimulants?
amphetamines, cocaine, ecstasy
What are the functions of stimulants?
Increased arousal
What are some examples of opiates?
heroin, morphine, opium, pain pills
What are the function of opiates?
Decreased reaction to pain and euphoria