Psych/Soc Flashcards
What is Franz Gall known for?
Phrenology: The shape and size of the brain is correlated with mental ability; disproven.
What is Pierre Flourens known for?
Identified that different areas of the brain have different functions through ablation/extirpation.
What is William James known for?
Founder of American psychology. Known for functionalism, which is the study of how different mental processes help individuals adapt to their environments.
What is John Dewey known for?
Like William James, he’s known for functionalism. However, he focused on the study of the organism as a whole as it functioned to adapt to its environment.
What is Paul Broca known for?
Identified Broca’s Area (speech prod.) through studying the effects of brain damage.
Hermann Von Helmholtz
Measured nerve impulse speed.
Sir Charles Sherrington
Discovered synapses. However, through they were electrical, not chemical.
What is the parasympathetic response?
Rest-and-digest
What is the sympathetic response?
Fight-or-flight
What is the function of the hindbrain?
The hindbrain functions in refined motor movements, vital functioning, and arousal + alertness.
What is the function of the midbrain?
The midbrain functions in sensorimotor reflexes (superior and inferior colliculi)
What is the function of the forebrain?
The forebrain function in perceptual, cognitive, and behavioral processing; emotion and memory
What are some brain mapping methods?
EEG, rCBF, CT, PET, MRI, fMRI
What structures surround and protect the brain?
The brain is protected by meninges (pia mater, arachnoid mater, and dura mater), bone, periosteum, and skin
What is the function of the basal ganglia?
Smooth movement
What is the function of the cerebellum
Coordinated movement
What is the function of the cerebral cortex?
Complex perceptual, cognitive, and behavioral processes
What is the function of the hypothalamus?
Hunger & thirst; emotion
What is the function of the inferior and superior Colliculi?
Sensorimotor reflexes
What is the function of the limbic system?
Emotion & memory
What is the function of the medulla oblongata?
Vital function (breathing, digestion)
What is the function of the reticular formation?
Arousal & alertness
What is the function of the thalamus?
Sensory relay station
What is the function of the frontal lobe?
The frontal lobe functions in impulse control, motor function, speech prod., long-term planning
What is another function of the parietal lobe aside from somatosensory processing?
Spatial processing, orientation, and manipulation
What is another function of the temporal lobe aside from auditory processing?
Speech perception (Wernicke’s area), memory and emotion (limbic system)
What is ipsilateral communication?
Same body side communication with hemisphere
How is the dominant hemisphere defined?
The dominant hemisphere is the one the is more heavily stimulated during language reception and production
What is the function of dopamine?
Smooth movements and steady processing
What is the function of GABA/Glycine
Brain “stabilizer”
What is the function of glutamate?
Brain excitation
Which endocrine organs influence behaviour?
- Hypothalamus: releases pituitary hormones, which triggers the release of other hormones
- Adrenal Medulla: produces epinephrine which causes a sympathetic response
- Adrenal Cortex: Produces cortisol which causes a stress response
- Adrenal Cortex + Testes: Produces testosterone which is associated with aggression and libido
What are the sample and control groups in a twin study?
The sample group is monozygotic twins, while the control group is dizygotic twins.
What are the sample and control groups in an adoption study?
The sample group is the adotive family, and the control group is the biological family.
Describe the process of neuralation.
- Ectoderm overlying the notochord begins to furrow forming a neural groove surrounded by two neural folds
- Cells at the edge of the neural fold are called neural crest cells, these cells migrate and differentiate
- The furrow then closes to form the neural tube, which ultimately forms the CNS
What is the rooting reflex in infants?
Cheek turns when touched.
What is the moro reflex?
Arms flair when baby’s head moves suddenly.
What is the babinski reflex?
Toes fan outwards when sole of foot is brushed.
What is the grasping reflex?
Holding onto any object placed in hand
What are the two main themes in early motor development?
- Gross motor development proceeds from head to toe
- Fine motor development proceeds from core to periphery
Describe the pathway for stimuli to reach conscious perception.
Sensory receptor → afferent neuron → efferent neuron → sensory ganglion → spinal cord → brain (projection areas)
What is the function of hair cells?
Sense motion of fluid in inner ear
What is the function of noicereceptors?
Sense painful or bothersome physical stimuli
What is the function of olfactory receptors?
Sense volatile chemicals
What is the function of osmoreceptors?
Sense changes in blood concentration
What is the function of photoreceptors?
Sense electromagnetic radiation in the visible range
What is the function of taste receptors?
Sense dissolved receptors
What is the function of thermoceptors?
Sense changes in temperature
What is absolute threshold?
Minimum amount of stimuli needed to be detected by sensory receptors
What is the difference threshold?
The minimum difference b/n stimuli to detect difference b/n them
What is Weber’s Law?
Just noticible differences are best expressed as a ratio, which is constant over the range of most sensory stimuli
What is signal detection theory?
Concerns the threshold to sense a stimulus given obscuring internal/external stimuli
What is the function of a cornea?
The cornea gathers and focuses incoming light
What is the function of the pupil?
The pupil allows the passage of light from anterior to posterior chamber
What is the function of the iris?
The iris controls the size of the pupli w/ 2 muscles (dilator pupillae & constrictor pupillae)
What is the function of the ciliary body?
The ciliary body produces the aqueous humor (bathes the front part of the eye) & contains ciliary muscle which is responsible for accomodation
What is the function of the canal of Schlemm?
The canal of Schlemm drains the aqueous humor
What is the function of the lens?
The lens lies right behind the iris & controls the refraction of incoming light
What is the function of the retina?
The retina detects images
What is the function of the sclera?
The sclera is the white of the eye, and it provides structural support
List the structures in the visual pathway.
Cornea → pupil → lens → vitreous → retina (rods → cones → bipolar cells → ganglion cells) → optic nerve → optic chiasm → optic tract → lateral geniculate nucleus (LGN) of thalamus → radiations through parietal & temporal lobes → visual cortex (occipital lobe)
What is parallel processing?
Parallel processing is the simultaneous analysis of color, shape, and motion of an object → calls on memory systems to compare visual stimuli to past experiences in order to help determine an object’s identity
What cells are responsible for detecting shape?
Parvocellular cells
What cells are responsible for detecting motion?
Magnocellular cells
What is the function of bipolar cells?
Bipolar cells highlight the gradient b/n adjacent rods/cones
What is the function of ganglion cells?
Ganglion cells group together to form the optic nerve
What structures are used to detect linear acceleration? rotational acceleration?
The vestibule (utricle and saccule) are used to detect linear accleration, and the semicircular canals are used to detect rotational acceleration
List the structures in the auditory pathway.
pinna/auricle → external auditory canal → tympanic membrane → malleus → incus → stapes → oval window → perilymph in cochlea → basilar membrane → hair cells → vestibulocochlear nerve → brainstem → medial geniculate nucleus (MGN) of thalamus → auditory cortex (temporal lobe)
How does the organization of the cochlea indicate the pitch of an incoming sound?
The basilar membrane is tonotopically organized → high-pitched sounds cause vibrations at the base of the cochlea and lower-pitched sounds cause vibrations at the apex of the cochlea
List the stuctures in the olfactory pathway.
nostrils → nasal cavity → olfactory chemoreceptors (olfactory nerves) or olfactory epithelium → olfactory bulb → olfactory tract → higher-order brain regions, including the limbic system
What are the four main modalities of somatosensation?
- Pressure
- Vibration
- Pain
- Temperature
What is bottom-up processing?
parts → whole