Ventromedial frontal areas & handedness Flashcards
What area was likely damaged in the case of Phineas Gage?
Ventromedial region of both frontal lobes
T/F Damage to the ventromedial frontal area has no impact on personality
False; damage can considerably alter personality
The ventromedial frontal area is reciprocally connected with what?
Subcortical nuclei, like the amygdala and hypothalamus
It is hypothesized that the ventromedial frontal area functions in what?
Emotion and decision making
A high concentration of _______ receptors was found in monkeys with socially adapted behavior
Serotonin S2
A low concentration of serotonin S2 receptors was present in monkeys with _____ behavior
Aggressive and socially uncooperative
Functions of the prefrontal association area include:
Judgment
Planning for the future
Holding and organizing events from memory for prospectivr action
About 95% of the population uses which cerebral hemisphere?
Left hemisphere
T/F If the dominate hemisphere is damaged early in life, the non-dominate hemisphere cannot develop the speech and language comprehension capabilities
False, the non-dominant hemisphere can develop those capabilities (plasticity)
General interpretive functions of ____ and ____ gyrus are more well developed in one cerebral hemisphere
Wernicke’s and angular gyrus
T/F Speech and motor are more well developed in one cerebral hemisphere
True
What percentage of right handed people have a left hemisphere dominance?
96%
What percentage of right handed people have equal left and right hemisphere dominance?
0%
T/F Most left handed people have right hemisphere dominance.
False; most are left dominant (70%)
What percentage of left handed people have equal dominance between the left and right hemispheres?
15%
The left hemisphere is usually associated with what characteristics?
Language based intellectual functions Interpretive functions of symbolism, understanding spoken and written words Analytical functions (like math) Speech
The right hemisphere is associated with what?
Music
Non-verbal visual experiences (body language)
Spatial relations
Bidirectional communication between anterior portions of the temporal lobe occurs through what?
Anterior commisure
Bidirectional communication between most of the cortical hemispheres occurs through what?
Corpus callosum
The corpus callosum does not provide communication between what lobe?
Anterior portions of temporal lobe
If the corpus callosum is sectioned, what no longer occurs?
Information transfer from one cortex to the other
Why was the corpus callosum originally split?
To prevent spread of seizure activity from one hemisphere to the other in severe cases of epilepsy
The left hemisphere usually matches based on what?
Function
The right hemisphere usually matches based on _____
Appearance
