Learning, Memory, and Emotions: Neuroscience Key Concepts

What is learning?

Acquisition of sensory information that alters our nervous system to affect perception and behavior over time.

What is memory?

Maintenance or storage of information over short or long periods of time.

What part of the brain is primarily focused on learning?

The mammalian brain, particularly the medial temporal lobe.

What do we learn about learning and memory from?

Case studies of brain damage.

What structure is contained in the medial temporal lobe?

The hippocampus.

What happened to Patient H.M?

He had a large region of the medial temporal lobe removed to treat epilepsy.

What were the effects of the virus infection on Patient E.P?

Most thinking skills survived, but he had impaired short-term memory.

What is retrograde amnesia?

A brain injury that causes a person to forget everything about their life up until the injury.

What is anterograde amnesia?

A condition where a person cannot learn new information or store new facts about the world.

What types of memories are created and stored differently in the brain?

Declarative memories, motor memories, emotional memories, and short-term memories.

What are declarative memories?

Explicit memories that can be described or declared.

What is semantic memory?

Memories of specific facts and pieces of information.

What is episodic memory?

Memories of one's own past experiences.

What is non-declarative memory?

Implicit memory, encompassing skills, initial learning, priming, and conditioning.

What is motor learning?

Improving at specific tasks through practice over time.

What is the role of the hippocampus in memory formation?

It packages sensory information into a single memory that can be accessed later.

What is memory consolidation?

The process by which short-term memories are transformed into long-term memories.

What triggers memory recall?

The process of accessing information stored in long-term memory.

What is reconsolidation?

The process triggered by memory recall that can solidify and edit the memory trace.

What is a downside of reconsolidation?

Witness testimony can be manipulated or contaminated through conversations.

What is the upside of reconsolidation in PTSD?

It may allow for the reduction of intense emotions associated with traumatic memories.

What is the Morris water maze used for?

To study escape latency and spatial memory in rodents.

What is synaptic plasticity?

The ability of synapses to strengthen or weaken over time, contributing to learning and memory.

What role does adult neurogenesis play in memory?

It can contribute to memory resilience as we age.

How are hippocampal circuits structured?

They consist of axons projecting to the next neuron, releasing glutamate.

What happens during the initial stages of memory consolidation?

The hippocampus is required to bind sensory activity into a memory.

When is the hippocampus no longer needed for memory maintenance?

Once the memory trace has been well established in the cortex.

Define memory.

Maintenance or storage of information over short or long periods of time.

What happened to Patient H.M.?

He had a large region of the medial temporal lobe removed to treat epilepsy.

What were the effects of the virus infection on Patient E.P.?

Most thinking skills survived, but he had impaired short-term memory.

What can Patient E.P. do despite his memory impairment?

He can learn new skills but has no memory of performing the tasks before.

What are the conclusions from studying amnesic patients?

There are multiple distinct memory systems in the brain.

What type of memories are created and stored differently from motor and emotional memories?

Declarative memories.

What brain areas are related to motor learning?

Motor cortex, basal ganglia, and cerebellum.

What is the process of memory consolidation?

The process by which short-term memories are transformed into long-term memories.

What can affect witness testimony?

Conversations with law enforcement or other witnesses can manipulate or contaminate memories.

What is the significance of the Morris water maze in rodent studies?

It helps understand the neurobiological underpinnings of learning and memory.

How does the hippocampus contribute to memory resilience?

Through adult neurogenesis, which can help maintain memory function as we age.

What happens to the hippocampus after a memory trace is established?

It is no longer needed for the maintenance of that memory.

What can be modified to change synapse strength?

The amount of neurotransmitter released.

What does more neurotransmitter in the synaptic cleft lead to?

More opportunities for receptors to be activated, resulting in a larger postsynaptic response.

What is long-term potentiation (LTP)?

A process that strengthens synapses based on recent patterns of activity.

How can we probe circuits within the hippocampus?

Using electrophysiology to record responses from sets of neurons.

What are some innate and universal emotions?

Anger, disgust, fear, happiness, sadness, and surprise.

Why is studying emotions in animals limited?

Many emotions are hard to study in animals, especially beyond fear.

What does the James-Lange theory of emotion propose?

Feeling emotions is the perception of physiological changes in response to a stimulus.

What is the Cannon-Bard theory of emotion?

Emotions and physiological responses occur independently and simultaneously.

What does the Schachter-Singer two-factor theory state?

Emotional responses are based on physiological reactions and cognitive labeling.

What is the role of the limbic system in emotions?

It is a set of interconnected brain regions important for emotional feelings and expression.

What is the amygdala's function?

It processes sensory information and is essential for fear and stress responses.

What happened to Patient SM?

She lost her amygdala and felt no fear, unable to detect fear or aggression in others.

What is learned fear?

The process by which organisms learn to fear previously neutral stimuli associated with pain.

What is the stress response?

Changes in the body and brain when encountering something scary, involving the HPA axis.

What does the HPA axis consist of?

The hypothalamus, pituitary gland, and adrenal glands working together to release stress hormones.

What is the role of the amygdala in the stress response?

It acts as an ON switch for activating the fight or flight response.

What role does the hippocampus play in the stress response?

It acts as an OFF switch to prevent the stress response from being constantly activated.

What is the role of the pituitary gland?

It is the master gland that controls the release of hormones from many other glands.

Where is the pituitary gland located?

It dangles below the hypothalamus.

What are tropic hormones?

Hormones produced by the pituitary gland that stimulate the release of other hormones.

What are the two main divisions of the pituitary gland?

Anterior pituitary and posterior pituitary.

How does the anterior pituitary receive signals?

It receives hormones from the hypothalamus via a portal system.

What hormones are released by the posterior pituitary?

Oxytocin and vasopressin.

What is the HPA axis?

The hypothalamic-pituitary-adrenal axis that regulates stress response.

What hormone does the hypothalamus release to trigger the HPA axis?

Corticotropin-releasing hormone (CRH).

What is the effect of cortisol in the bloodstream?

It binds to glucocorticoid receptors throughout the body and brain.

What is the role of norepinephrine in the brain?

It is an arousal-promoting neurotransmitter that helps with the fight or flight response.

What triggers aggressive behavior?

Anger and aggression are often directed at others in perceived threats or stressful situations.

What is the difference between anger and aggression?

Anger is an internal feeling, while aggression is an outward display.

What part of the brain is crucial for emotional responses?

The prefrontal cortex helps control emotional responses.

How does the amygdala relate to aggression?

It is important for regulating aggressive behavior.

What are the three main elements of romantic love?

Attraction, lust/libido, and attachment.

What regulates male and female sexual behaviors?

Different hypothalamic nuclei.

What is the role of oxytocin in bonding?

It is important for bonding with partners and offspring.

What effect does administering oxytocin intranasally have on humans?

It increases trust and improves the ability to infer mental states from facial expressions.

What is the effect of vasopressin on social behavior?

It promotes social dominance and aggression.

How does vasopressin affect mate bonding in prairie voles?

Blocking vasopressin receptors impairs bonding and induces polygamous behavior.

What happens to cortisol levels during stress?

They rapidly elevate in the bloodstream.

What is the impact of prolonged cortisol elevation on the brain?

It can damage hippocampal neurons and impair long-term potentiation (LTP).

What is the significance of the limbic system in stress response?

It evaluates threats through the amygdala.

What is the role of the hypothalamus in aggression?

It triggers aggressive behaviors when activated.

What is the relationship between the prefrontal cortex and aggression?

It helps inhibit aggressive impulses from the amygdala and hypothalamus.

What is the significance of the prairie vole in studies of mate bonding?

Prairie voles are monogamous and show strong pair bonding after mating.

What does the prairie vole experiment demonstrate about mate bonding?

Prairie voles spend more time with their partner than alone or with strangers.