What effect does hypothermia have on the central nervous system (CNS)?

Hypothermia leads to a significant decrease in the temperature of the body, which directly impacts central nervous system (CNS) function. As body temperature drops, metabolic activity within the CNS slows down, resulting in reduced overall CNS activity. This can manifest as decreased alertness, impaired cognitive function, and diminished motor coordination.

In more severe cases of hypothermia, individuals may exhibit confusion, lethargy, and even loss of consciousness due to the effects on neurotransmitter release and synaptic function. This decreased CNS activity is a protective mechanism of the body, aiming to conserve energy and prevent cellular damage in response to the low temperatures.

The other options suggest increased awareness, heightened reflexes, or enhanced sensory perception, which are not consistent with the physiological effects of hypothermia, as it typically causes a slowdown in bodily responses and functions.