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Physiology Exam 4- Lecture 13
Limbic System, Motivation, and Emotion
22
Physiology
Professional
11/14/2011

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Term
What are the four primary motivations?
Definition
1. Feeding
2. Flight/fight
3. Fahrenheit (temperature regulation)
4. Fornication
Term
Define "secondary motivation"
Definition
Behaviors or motivations that are derived from primary motivations, such as what to eat or drink, what clothes to put on, etc. Moods you are in, your habits or preferences, skills you have can all affect secondary motivations.
Term
What are the two components to emotion
Definition
a. The inner emotion itself, such as fear, love, joy, anger; this is the conscious experience of emotions.

b. The outer expression or motor component of the emotion; this is emotional behavior.
Term
What area in the brain controls and regulates motivations and emotions
Definition
The limbic system
Term
List the Papez circuit
Definition
Cingulate cortex → hippocampus → mammilary body → anterior nucleus of thalamus → back to cingulate cortex
Term
What is thought to be the role of the hippocampus?
Definition
Memory
Term
What is Kluver-Bucy syndrome?
Definition
Large bilateral destruction of the temporal lobe, including the hippocampus, amygdala, and temporal cortex
Term
What phenomena does Kluver-Bucy sundrome cause?
Definition
1. Visual agnosia
2. Increased oral tendencies
3. Increased motor seeking behavior
4. Increased vocal activity
5. Hypersexuality
6. Loss of fear response
Term
What is the function of the amygdala?
Definition
Thought to be fear, rage, aggression, and emotional significance to events

Fear/ higher reward conditioning
Term
What cortical areas are responsible for experiencing emotions?
Definition
Orbital and medial prefrontal cortex, and anterior cingulate cortex
Term
What is a primary function of the hypothalamus?
Definition
Emotional expression (e.g., the autonomic responses to emotions)

The hypothalamus has connections to both autonomic and somatic cell groups that mediate motor responses (such as laughing and crying) to emotional stimuli.
Term
Define the ventral striatum
Definition
This portion of the basal ganglia helps select the appropriate behavior for a situation (analogous to the motor function of the basal ganglia in which appropriate motor programs are selected.
Term
Define the mediodorsal thalamic nucleus
Definition
The thalamic relay nucleus associated with the limbic system
Term
Describe the James-Lange theory of emotions
Definition
Physical changes from external stimuli are the emotion.

“We feel sorry because we cry, angry because we strike, afraid because we tremble.”
Term
Describe the Cannon-Bard theory of emotions
Definition
One set of physiological changes is not associated with just one set of emotions.

Sensory input divides to go to the sensorimotor cortex and to the limbic system. In effect, the experience of emotion and the physiological reactions occur simultaneously.
Term
Can sensory input effect emotional state?
Definition
Yes

-Spinal cord damage can reduce emotional intensity
-Smiling makes you happier :)
Term
What are the four major reward areas/ pleasure centers associated with primary motivations?
Definition
Dorsal pons, ventral tegmental area, lateral hypothalamus, and septal area.
Term
What neurotransmitter is associated with the reward/pleasure centers?
Definition
Dopamine

-why most addictive psychoactive drugs enhance dopamine
Term
Who was Phineas Gage?
Definition
A railroad foreman who had a metal rod pierce his skull and left frontal cortex, changing his personality to be more restless, loud, profane, and impulsive
Term
How do many drugs treat depression?
Definition
Drugs used to treat depression block reuptake of norepinephrine, dopamine, and/or serotonin in the limbic system
Term
What may cause schizophrenia?
Definition
Possibly overactive dopamine pathways
Term
What is a common side effect of schizophrenia medication, and why?
Definition
Muscle tics- because dopamine antagonists lead to extrapyramidal effects
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