Chapter 3A

Question 0

Dragons of Eden, Carl Sagan, 57b

Answer 0

Neural Chassis functions:
Basic neural machinery for 1)reproduction, 2) self-preservation 3) regulation of the heart 4) blood circulation 5) respiration

Question 1

Dragons of Eden, Carl Sagan, 57a

Answer 1

Triune Brain
Most Ancient part of the Brain: Medulla & Pons- combination of
1) Spinal Cord
2) hindbrain
3) midbrain (oldest of 3)

Question 2

Dragons of Eden, Carl Sagan, 63

Answer 2

Neural Chassis Behavioral Functions*

1) aggressive behavior
2) territoriality
3) ritual
4) establishment of social hierarchies

Question 3

Dragons of Eden, Carl Sagan, 58

Answer 3

R-Complex (reptilian part of the brain)
   •Evolved several hundred millions
     years ago 
   •involves the Midbrain 
                A) oldest of neural chassis
                B)olfactostriatum 
                C)corpus striatum
                D)globus pallidus

Question 4

Dragons of Eden, Carl Sagan,58b

Answer 4

Limbic System (surrounding R-Complex)

• Evolved more than 150 million y.a.
• share with other mammals but not, in its full elaboration, with the reptiles

Question 5

Dragons of Eden, Carl Sagan, 58c

Answer 5

Neocortex (surrounding rest of brain)

• Evolved several tens of million years ago but its development accelerated greatly in the last few million years ago
• share w/higher forms of primates, dolphins and whales(humans, dolphins, and whales possessing the most elaborately developed
• represents 85% of the brain*

Question 6

Dragons of Eden, Carl Sagan, 60

Answer 6

The brain of a human fetus develops from the inside out, and, roughly speaking, runs through the sequence:

1) Neural Chassis
2) R-Complex
3) Limbic System
4) Neocortex

Question 7

Dragons of Eden, Carl Sagan, 66

Answer 7

Characterized by vivid emotion
•Electrical Charges in Limbic system sometimes results in symptoms similar to those of psychoses or of those produced by psychedelic or hallucinogenic drugs
•Sites of action of many
psychotropic drugs are in the LS

Question 8

Dragons of Eden, Carl Sagan, 66b

Answer 8

Endocrine System intimate part of LS
      •endocrine imbalances cause 
       mood altering qualities 
      •Located in LS the Amygdala -- 
     deeply involved Aggression/Fear
      •Pituitary Gland

Question 9

Dragons of Eden, Carl Sagan, 66c

Answer 9

Hypothalamus (located in LS) exudes small hormonal proteins,one of which ACTH(adrenocorticotropic)
Influences 1)Visual Retention
2)Anxiety
3)Attention Span

• LS-oldest part Olfactory Cortex