Neural aspects of anticipatory behavior

Area of Science:

• Neuroscience
• Cognitive Science
• Behavioral Science

Background:

• Anticipatory behavior manifests in both perceptual and motor domains.
• Expectant attention and motor preparation involve signal selection to improve signal-to-noise ratio.
• Functional similarities suggest shared underlying anatomical substrates.

Purpose of the Study:

• To explore the functional and anatomical similarities between anticipatory attention and motor preparation.
• To investigate the role of the prefrontal cortex in organizing anticipatory behavior.
• To hypothesize the role of thalamic nuclei in motor preparation, drawing parallels with selective attention models.

Main Methods:

• Review of existing literature on anticipatory behavior, attention, and motor preparation.
• Analysis of the anatomical connections and functional roles of the prefrontal cortex and thalamic nuclei.
• Examination of psychophysiological evidence related to anticipatory processes.

Main Results:

• The prefrontal cortex organizes anticipatory behavior via top-down activation of cortico-cortical and thalamo-cortical loops.
• Sensory and motor areas are primed by the prefrontal cortex for stimulus reception and motor program execution.
• Specific thalamic nuclei (dorsomedial nucleus, pulvinar) are activated by the prefrontal cortex.

Conclusions:

• Anticipatory attention and motor preparation share functional similarities reflected in their anatomical organization.
• The prefrontal cortex plays a crucial top-down role in orchestrating anticipatory behaviors.
• The reticular nucleus of the thalamus is hypothesized to play a key inhibitory role in motor preparation, similar to its role in selective attention.