Significant damage to which of the following parts of the brain will most likely cause a person to fall into a deep coma from which the person will be unable to awaken?

a. hypothalamus
b. frontal lobe
c. reticular formation
d. amygdala
e. thalamus

The answer is hypothalamus

Explanation:

Coma represent a state of deep sleep difficult to wake from. Now, as a result of hypothalamus being the control centre for autonomic nervous system and many involuntary actions such as

- sleep

- feeling of pain, pleasure and anger

- and also plays vital role in homeostasis

Significant damage to the hypothalamus would GREATLY prolong sleep rhythms and inhibit sensory response to stimuli of touch, thus, making victim unable to be waken up

geologic time scale (for gradpoint) =)