[Affectivity in the nervous system]

Area of Science:

• Neuroscience
• Psychology

Context:

• Affectivity is a complex term encompassing mood, well-being, and emotional states.
• It relates to an organism's sensitivity and capacity for feelings and passions.

Purpose:

• To demonstrate that affectivity arises from the central nervous system's perception of internal and external stimuli.
• To differentiate the origins of affectivity from common assumptions, attributing it to the central brain rather than the cerebral cortex.

Summary:

• Affectivity is processed by the central brain, utilizing memory input from the limbic system and information from the hypothalamus and reticular system.
• The limbic cortex analyzes these states as favorable or unfavorable, translating them into pleasure or aversion in the central brain, thereby motivating action.
• These motivations are relayed to the prefrontal cortex, a center for action imitation, conscious activity, and affective memory, highlighting a two-tiered system of affectivity.

Impact:

• This research proposes an understanding of affectivity and affective memory residing in distinct neural centers: the limbic cortex (unconscious, motivational) and the prefrontal cortex (conscious).
• It suggests the existence of unconscious affectivity, drawing parallels with Freudian concepts of the unconscious mind.