Psych/Soci Flashcards
(166 cards)
Parasympathetic Nervous System (PNS) activation
“rest and digest”
- pupils constrict
- saliva stimulated
- constricts bronchii
- heart rate slows
- blood pressure lowers
- digestive peristalsis and secretion stimulated
- bile release stimulated
- contracts bladder
Sympathetic Nervous System (PNS) activation
“fight or flight”
- pupils dilate
- saliva inhibited
- relaxes bronchii
- heart rate increases
- blood pressure increases
- peristalsis and secretion inhibited
- glucose production and release stimulated
- release of epi + norepi from adrenal glands
- bladder inhibited from contraction
- orgasm stimulated
Hindbrain
cerebellum, medulla oblongata, pons, reticular formation
Midbrain
superior and anterior colliculi
Forebrain
Thalamus, hypothalamus, cerebral cortex, basal ganglia, limbic system
Thalamus function
relay system for sensory information
Hypothalamus function
maintains homeostasis and integrates with the endocrine system through the hypophyseal portal system that connects it with the anterior pituitary
Basal ganglia function
smooths movements and helps maintain postural stability
Limbic system (parts + function)
Amygdala - fear and agression
Hippocampus - memory storage
Septal nuclei - pleasure seeking
Fornix - communication with the limbic system
Frontal lobe function
Executive function, impulse control, long-term planning (PFC), motor function (primary motor cortex), speech production (Broca’s Area)
Parietal lobe function
Sensation of touch, pressure, temperature, and pain (somatosensory cortex), spatial processing, orientation, and manipulation
Occipital lobe function
Visual processing
Temporal lobe function
Sound processing (auditory cortex), speech perception (Wernicke’s area), memory, and emotion (limbic system)
Acetylcholine
Voluntary motor control, parasympathetic nervous system, attention, alertness
Epinephrine and norepinephrine
Fight-or-flight responses wakefulness, alertness
Dopamine
Smooth movements, postural stability
Serotonin
Mood, sleep, eating, dreaming
GABA
Brain “stabilization”; major inhibitory neurotransmitter
Endorphins
Natural painkillers
Sensation pathway
Sensory receptors respond to stimuli and trigger electrical signals; sensory neurons send impulses to the CNS, where the signals are transmitted to projection areas in the brain for further analysis.
Weber’s law
The just-noticeable-difference for a stimulus is proportional to the magnitude of the stimulus
Signal detection theory
The effects of nonsensory factors, such as experiences, motives, and expectations, on perception of stimuli (hit, miss, false alarm, correct rejection)
Adaptation
A decrease in response to a stimulus over time
Visual pathway
retina –> optic nerve –> optic chiasm –> optic tract –> LGN –> visual radiations –> visual cortex