LTP occurs only when the high-intensity, high-frequency stimulation activates the
both presynaptic and postsynaptic
Why do we have 2 memory systems- explicit and implicit- that are both capable of learning the same material? What advantage is there in having a second, conscious system? Recent evidence suggests that the answer is
The amygdala appears to be involved in the _____ component of memory, whereas the cerebellum apprears to be involved in the _____ component.
The striatum is thought to store
memories for consistent relationships between stimuli and responses AND the type of memories that develop incrementally over many trials (habit formation).
The current consensus is that memories of experiences are likely stored
diffusely throughout the structures of the brain that participated in the original experience
has been commonly studied in several different neural circuits in the hippocampus
The main reason why LTP is one of the most widely studied neuroscientific phenomena is that it
involves a synaptic change similar to the synaptic change that has been hypothesized to be the basis of memory storage.
A major contribution of H.M.'s case
was the first to strongly implicate the medial temporal lobes in memory, effectively challenged the view that memorial functions are diffusely and equivalently distributed throughout the brain, provided support for the view that there are distinct modes of short-term and long-term storage, and provided evidence of memory without conscious awareness.
Small amounts of food eaten prior to a meal ______. This is called _______.
increase; the appetizer effect
Although _____ agonists are effective in the treatment of obesity, they are currently not in wide use because they tend to have dangerous side effects.
As a meal is consumed,
there is a rapid decline in the positive-incentive values of the particular tastes that are being consumed AND there is a gradual decline in the positive-incentive value of all foods.
If you were to eliminate 500 calories from your daily diet, you would likely
initially lose weight, but the amount lost each day would decline until a new stable weight was reached
According to the text, many people who live in modern industrialized societies have difficulty eating a diet with enough vitamins and minerals because
they eat too many different flavors each day for their system to learn the relation between the flavor of a food and its effects
Leptin has proven effective in the treatment of obesity in
those who are homozygous for the mutant ob gene
Hormones influence sexual behavior by
directing the development of many of the anatomical, physiological and behavioral characteristics that distinguish one as male or female AND by activating the reproduction-related behavior of sexually mature adults
Which of the following statements is true?
a male pituitary gland into a female displays a cyclic pattern of hormone release
Although the pituitary is often referred to as the master gland, strictly speaking the master gland is the
There are often large minute-to-minute fluctuations in the levels of a person's circulating hormones, These fluctuations are often the result of
pulsatile hormone release
Which of the following statements describes our current understanding of differences in the structure of human female and human male brains?
many structural differences have been documented
The fact that the probability of homosexuality of human males increases as a function of the number of older brothers
is the fraternal birth order effect
Same sex sexual preferences have been induced in several species by perinatal
castration of males AND testosterone injections in females
In one study volunteers gradually reduced the number of hours that they slept each night until they felt that they had reached their limit. On the average, this limit was
In view of the evidence, the widespread practice of taking melatonin to promote sleep is
likely to be of no more than minor benefit
A vivid dreamlike state during wakefulness, often just as one awakens or falls asleep is
a hypnagogic hallucination
After a person falls asleep at night, the fourth stage of sleep EEG that is normally observed is
Professor Bland sometimes falls asleep while she is having a discussion. She would likely be diagnosed as having
Which of the following is NOT a change that signals the beginning of REM sleep?
an increase in the tension of the muscles of the body core
Which of the following is characterized by a low-amplitude, high frequency sleep EEG signal that is similar to that observed during active wakefulness?
Because REM sleep is similar to wakefulness in several respects, it makes sense that REM sleep circuits are controlled by a structure involved in maintaining wakefulness: the
reticular activating system
A condition in which a person's sleep is repeatedly disrupted by the inability to breath is called
Many addicts who are motivated to "kick the habit" manage to stop taking their drug, but often
According to the text, addicts are drug users who
continue to use a drug despite the drug's adverse effects on their health and social life, and despite their efforts to stop
According to the incentive-senitization theory of addiction, all addictive drugs produce
sensitization to the effects that influence the positive-incentitive value of the drug
Which of the following is a finding about addiction that is currently influencing the study of its brain mechanisms?
Addiction is psychologically complex.
Addiction involves many parts of the brain.
Addiction involves neurotransmitters other than dopamine.
Addictive behavior is a general problem that involves more than addiction to drugs.
The early physical-dependence theories of drug addiction were discredited by the observation that
detoxified addicts almost always return to their drug-taking
Modern physical-dependence theories of drug addiction attempt to account for the fact that addicts frequently relapse after lengthy drug-free periods by postulating
that conditioned withdrawal effects are the basis of drug craving.
In addition to the nucleus accumbens, the prefrontal cortex, the hippocampus, and the amygdala are thought to play major roles in
the initial taking of addictive drugs.
The severity of withdrawal symptoms depends upon the
particular drug in question, dose of the preceding drug, duration of the preceding drug, and speed with which the drug is cleared from the body
Originally, the nucleus accumbens was thought to mediate the experience of reward, but some current evidence suggests that increases in extracellular dopamine occur in the nucleus accumbens when the
subject expects the reward.
The lack of strong support for early physical-dependence theories of addiction lent indirect support to the notion that the primary factors in drug addiction are
the drug's positive-incentive properties.
As drug craving and compulsive drug taking develops, control of drug taking is thought to shift from the
ventral to dorsal striatum AND prefrontal cortex to stress circuits in the hypothalamus.
According to the Wernicke-Geschwind model, Broca's area contains the neural programs of
articulation (speech production).
The helping-hand phenomenon was demonstrated in a test
in which the test items were in open view on top of a table.
Evidence that the perception of music is lateralized comes from demonstrations that
the left ear is superior to the right in the melodic dichotic listening test.
The discovery of the lateralization of aphasia and apraxia led to the
concept of a dominant left hemisphere.
Although the symptoms of apraxia are ________, apraxia usually results from damage to the ________ hemisphere.
After the picture of a familiar object is flashed in the right visual field of a human split-brain patient, the patient can
say what the object was AND reach into a bag with her right hand and select the object that was presented from a group of test objects.
The results of sodium amytal tests suggest that the percentage of healthy right-handers in the general population that are left-hemisphere dominant for speech is
more than 90%.
During a test in which split-brain patients were asked to verbally specify which of two colors, red or green, had been presented in the left visual field, an interesting phenomenon was discovered. This phenomenon is
According to the text, which of the following statements is true?
Some evidence suggests that the brains of females are less lateralized than those of males.
The two hemispheres, although similar in appearance, differ in function. The study of these functional differences is commonly referred to as the study of
lateralization of function.
The left-hemisphere is dominant for speech in
nearly all right-handers and the majority of left-handers.
A spoon is presented in the left visual field of a split-brain patient, and an apple is simultaneously presented in the right. Then, the patient is instructed to reach into two bags (one with each hand) and feel around until he comes up with the object that was presented on the screen. However, before the objects are withdrawn, the patient is asked to tell the experimenter what he has in each hand. The patient is likely to say, "I have
an apple in each hand"
According to the Wernicke-Geschwind model, when we read, the output of the angular gyrus is transmitted to
The results of CT and structural MRI studies of aphasic patients indicate that
not all aphasic patients have damage to the classic Wernicke-Geschwind areas.
most aphasics have extensive damage to subcortical white matter.
few, if any, aphasics have damage restricted to the classic Wernicke-Geschwind areas.
large anterior lesions tend to be associated with deficits in language expression, whereas large posterior lesions tend to be associated with deficits in language comprehension.
The belief that putting on a happy face makes one feel happier is an example of the
facial feedback hypothesis
Ronda was threatened by a robber so she kicked him. Her response is an example of
a defensive attack
According to the James-Lange theory, the
experience of emotion is produced by the brain's perception of the body's reactions to emotional stimuli.
Research on the lateralization of emotion in humans using functional brain imaging suggests that the degree to which it is lateralized to the right hemisphere depends on
the particular brain structure under investigation.
In the short-term, stressors produce physiological changes that
increase the ability to deal effectively with the stressor.
The structure in which the emotional significance of sensory signals is learned and retained is believed to be the
The amygdala is thought to activate the appropriate sympathetic and behavioral responses to threat via the __________, respectively.
hypothalamus and PAG
According to the Cannon-Bard theory, different emotional stimuli induce __________ patterns of autonomic nervous system activity.
According to the Cannon-Bard theory, the feeling of emotion by the cortex and the expression of emotion by the autonomic and somatic nervous systems are
Correlations between aggressive behavior and testosterone levels do not necessarily mean that high testosterone levels cause aggressive behavior because
aggressive encounters often cause increases in testosterone levels.
Depression is often divided into two categories: reactive depression and __________ depression.
The __________ individual typically leaves behind a trail of unfinished projects, unpaid bills, and broken relationships.
Drugs that reduce depression without increasing mania or reduce mania without increasing depression are called
The monoamine theory of depression is based on the fact that
most drugs used to treat depression are monoamine agonists.
Many studies have found structural and functional brain pathology in patients suffering from affective disorders. Although there is little consensus about the exact location of the brain pathology, it is most commonly observed in two structures: the
amygdala and anterior cingulate cortex.
Disorders characterized by recurring uncontrollable anxiety-producing thoughts and impulses are classified as __________ disorders.
Studies of monozygotic and dizygotic twins suggest that schizophrenia
is greatly influenced by genetic factors.
Hallucinations associated with schizophrenia often take the form of
imaginary voices making critical comments or telling the patient what to do.
A major problem with the therapeutic use of neuroleptics in the treatment of schizophrenia is that they
help only a small proportion of patients.
tend to act on only some symptoms.
produce disturbing side effects.
Which of the following is a positive symptom of schizophrenia?
incoherent speech or thought
Depressed patients who do not experience periods of mania are said to suffer from __________ affective disorders.